1
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Wang P, Su Y, Wu D, Xie B. Plasticizers inhibit food waste anaerobic digestion performance by affecting microbial succession and metabolism. JOURNAL OF HAZARDOUS MATERIALS 2024; 473:134554. [PMID: 38759407 DOI: 10.1016/j.jhazmat.2024.134554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/26/2024] [Accepted: 05/04/2024] [Indexed: 05/19/2024]
Abstract
The widely existed plastic additives plasticizers in organic wastes possibly pose negative influences on anaerobic digestion (AD) performance, the direct evidence about the effects of plasticizers on AD performance is still lacking. This study evaluated the influencing mechanism of two typical plasticizers bisphenol A (BPA) and dioctyl phthalate on the whole AD process. Results indicated that plasticizers addition inhibited methane production, and the inhibiting effects were reinforced with the increase of concentration. By contrast, 50 mg/L BPA exhibited the strongest inhibition on methane production. Physicochemical analysis showed plasticizers inhibited the metabolism efficiency of soluble polysaccharide and volatile fatty acids. Microbial communities analyses suggested that plasticizers inhibited the direct interspecies electron transfer participators of methanogenic archaea (especially Methanosarcina) and syntrophic bacteria. Furthermore, plasticizers inhibited the methane metabolisms, key coenzymes (CoB, CoM, CoF420 and methanofuran) biosynthesis and the metabolisms of major organic matters. This study shed light on the effects of plasticizers on AD performance and provided new insights for assessing the influences of plasticizers or plastic additives on the disposal of organic wastes.
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Affiliation(s)
- Panliang Wang
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Henan International Joint Laboratory of Aquatic Toxicology and Health Protection, College of Life Sciences, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Yinglong Su
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Dong Wu
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China
| | - Bing Xie
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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2
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K B, Pilli S, Rao PV, Tyagi RD. Predictive modelling of methane yield in biochar-amended cheese whey and septage co-digestion: Exploring synergistic effects using Gompertz and neural networks. CHEMOSPHERE 2024; 353:141558. [PMID: 38417486 DOI: 10.1016/j.chemosphere.2024.141558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/10/2024] [Accepted: 02/24/2024] [Indexed: 03/01/2024]
Abstract
This study performed bench scale studies on anaerobic co-digestion of cheese whey and septage mixed with biochar (BC) as additive at various dosages (0.5 g, 1 g, 2 g and 4 g) and total solids (TS) concentrations (5%, 7.5%, 10%,12.5% and 15%). The experimental results revealed 29.58% increase in methane yield (486 ± 11.32 mL/gVS) with 27% reduction in lag phase time at 10% TS concentration and 50 g/L of BC loading. The mechanistic investigations revealed that BC improved process stability by virtue of its robust buffering capacity and mitigated ammonia inhibition. Statistical analysis indicates BC dosage had a more pronounced effect (P < 0.0001) compared to the impact of TS concentrations. Additionally, the results were modelled using Gompertz model (GM) and artificial neural network (ANN) algorithm, which revealed the outperformance of ANN over GM with MSE 17.96, R2 value 0.9942 and error 0.27%. These findings validated the practicality of utilizing a high dosage of BC in semi-solid anaerobic digestion conditions.
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Affiliation(s)
- Bella K
- Department of Civil Engineering, National Institute of Technology Warangal, Quebec City, QC, Canada
| | - Sridhar Pilli
- Department of Civil Engineering, National Institute of Technology Warangal, Quebec City, QC, Canada
| | - P Venkateswara Rao
- Department of Civil Engineering, National Institute of Technology Warangal, Quebec City, QC, Canada.
| | - R D Tyagi
- BOSK Bio Products, Quebec City, QC, Canada
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3
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Jiang Z, Huang X, Wang S, Xiong J, Xie C, Chen Y. Divalent manganese stimulates the removal of nitrate by anaerobic sludge. RSC Adv 2024; 14:2447-2452. [PMID: 38223698 PMCID: PMC10784783 DOI: 10.1039/d3ra07088c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 01/07/2024] [Indexed: 01/16/2024] Open
Abstract
This study investigated the effect of different concentrations of Mn2+ on the removal of nitrate by anaerobic sludge and changes in the microbial communities through batch experiments. The results showed that the addition of Mn2+ promoted nitrate removal by anaerobic sludge; the nitrate was completely removed within 6 d in the treatment group with >5 mM Mn2+. With the increase in Mn2+, the concentration of nitrite and nitrous oxide increased in the first 4 d and then decreased to 0 μM after 8 d of incubation. The increasing tendency of ammonium increased firstly and then decreased with the addition of Mn2+ compared to A. Moreover, the Mn2+ removal efficiency gradually decreased with the increase of Mn2+ concentration. The changes of microflora structure in sludge before and after adding Mn2+ were analyzed, and the results revealed that the microbial communities in the sludge may have evolved towards an energy-efficient association of short-cut nitrification, denitrification, and anaerobic ammonia oxidation after adding Mn2+. Mn2+ stimulated the removal of nitrate by anaerobic sludge mainly by promoting the growth of PHOS-HE36.
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Affiliation(s)
- Zhaojie Jiang
- School of Resources, Environment and Materials, Guangxi University Nanning 530004 China
| | - Xuejiao Huang
- Guangxi Key Laboratory of Agro-Environment and Agro-Product Safety, College of Agriculture, Guangxi University Nanning Guangxi 530004 +86 18577976592
- Guangxi Bossco Environmental Protection Technology Co., Ltd. Nanning 530007 Guangxi China
| | - Shuangfei Wang
- College of Light Industry and Food Engineering, Guangxi University Nanning Guangxi 530004 China
| | - Jianhua Xiong
- School of Resources, Environment and Materials, Guangxi University Nanning 530004 China
- Guangxi Bossco Environmental Protection Technology Co., Ltd. Nanning 530007 Guangxi China
| | - Chunmin Xie
- Guangxi Bossco Environmental Protection Technology Co., Ltd. Nanning 530007 Guangxi China
| | - Yongli Chen
- Guangxi Bossco Environmental Protection Technology Co., Ltd. Nanning 530007 Guangxi China
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4
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Kang JH, Ahn JH. Optimization of cobalt, nickel, and iron supplement for mesophilic and thermophilic anaerobic digestion treating high-solid food waste. ENVIRONMENTAL TECHNOLOGY 2024; 45:779-793. [PMID: 36154558 DOI: 10.1080/09593330.2022.2128890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 08/31/2022] [Indexed: 06/16/2023]
Abstract
ABSTRACTThe effects of trace metals (iron (Fe), cobalt (Co) + Fe, and Co + nickel (Ni) + Fe) on mesophilic and thermophilic anaerobic digestion of food waste were quantified experimentally. Supplementation with 0 ≤ [Co] ≤ 5 mg/L, 0 ≤ [Ni] ≤ 10 mg/L, or 0 ≤ [Fe] ≤ 200 mg/L can significantly improve the productivity of mesophilic (MD) and thermophilic (TD) digesters. Addition of micronutrients increased biogas production, but excessive addition of trace metals hindered the production. Supplementation with Fe + Co or Fe + Co + Ni increased biogas production more than the addition of only Fe did. Within the design boundaries, the optimal concentrations for supplementation with three trace metals in MD were [Co] = 0.33 mg/L, [Ni] = 0.43 mg/L, and [Fe] = 5.35 mg/L, and in TD were [Co] = 1.41 mg/L, [Ni] = 3.84 mg/L, and [Fe] = 200 mg/L. TD required larger amounts of the trace metals than MD (4.3-37.4 times). The results can give quantitative information on trace metal supplementation for successful anaerobic digestion.
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Affiliation(s)
- Jang-Hyun Kang
- Department of Environmental Engineering, College of Engineering, Kangwon National University, Chuncheon, Korea
- Department of Environmental Resources Research, National Institute of Environmental Research, Incheon, Korea
| | - Johng-Hwa Ahn
- Department of Environmental Engineering, College of Engineering, Kangwon National University, Chuncheon, Korea
- Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon, Korea
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5
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Tang H, Liu Y, Liu X, Zhang A, Yang R, Han Y, Liu P, He HB, Li Z. Regulation methods and enhanced mechanism on the efficient degradation of aromatics in biochemical treatment system of coal chemical wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 348:119358. [PMID: 37890402 DOI: 10.1016/j.jenvman.2023.119358] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 10/08/2023] [Accepted: 10/14/2023] [Indexed: 10/29/2023]
Abstract
In order to address the problems of poor treatment effect of coal chemical wastewater (CCW) biochemical treatment system resulting in non-compliance with effluent standards and unstable operation, a combination regulation method of co-substrate metabolism and predominant flora enhancement was constructed, and the performance and mechanism of enhanced degradation of aromatics in CCW was also investigated in this study. The results showed that when the influent concentration of chemical oxygen demand (COD) and aromatics was less than 600 mg/L and 180 mg/L respectively, there was no significant effect of the combined regulation method on the enhanced treatment of aromatics, the removal rate of total organic carbon (TOC) in the system could all more than 73%; while when the influent concentration of COD increased to 800 mg/L and the aromatics concentration increased to more than 240 mg/L, the ordinary activated sludge system had collapsed. Compared with the regulation method of co-substrate metabolism alone, the combination regulation method increased the removal rate of TOC by 21%. The analysis of antioxidant enzyme activity showed that under the combination regulation method, the antioxidant enzyme activity of microorganisms was higher and their resistance to adverse environments was stronger. EPS and dehydrogenase analysis indicated that the combination regulation method was more conducive to microbial degradation of aromatics. Meanwhile, the analysis of microbial community structure showed that the aromatics degradation bacteria genera Rhodococcus, Luteococcus, etc. were enriched under the combination regulation method. The study provides a theoretical basis and technical guidance for solving the problems of unstable operation of CCW biochemical treatment systems and non-compliance with effluent standards.
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Affiliation(s)
- Hui Tang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Yongjun Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xingshe Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Aining Zhang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Rushuo Yang
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Yulu Han
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Pan Liu
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Hao Bo He
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China
| | - Zhihua Li
- School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Yan Ta Road. No.13, Xi'an, 710055, China; Key Lab of Northwest Water Resource, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
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6
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Afroze N, Nakhla G, Kim M, Yazdanpanah A. Effects of trace elements on digester performance and microbial community response in anaerobic digestion systems. ENVIRONMENTAL TECHNOLOGY 2023; 44:4157-4172. [PMID: 35611656 DOI: 10.1080/09593330.2022.2082324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 04/05/2022] [Indexed: 06/15/2023]
Abstract
Trace elements (TE), as micronutrients for microorganisms, have a significant impact on the stability of anaerobic digestion (AD). Studies have been conducted on process stability and performance of the AD of food waste (FW) by supplementing TEs. In this study, mesophilic batch biomethane potential (BMP) tests using FW were conducted to investigate the effect of TEs (Fe, Ni, Co, Se, and Mo) as single and mixed ions. In view of their scarcity, correlations between the microbial community and digester performance such as first-order hydrolysis coefficient (Kh), volatile fatty acids (VFA), methane yield, and methane production rate (MPR) have been developed. Ni2+ at 1 and 1.5 mg/L increased the methane yield by 27% and 23% respectively. Similarly, Co2+ at 0.1 and 0.5 mg/L increased the yield by 21% and 23% respectively, compared to control. Although Se4+ at all concentrations enhanced the methane yield, Fe2+ at only 50 mg/L increased methane yield by 22%. For mixed TEs, the combination of Ni2+ [1 mg/L] +Co2+ was the best and increased methane for all Co2+ concentrations (0.1, 0.4 and 0.5 mg/L) by 16%, 14% and 12% respectively. Firmicutes and Methanosaeta were the most abundant phyla among hydrolytic and methanogenic microbial groups, respectively, constituting 42%-61% and 60-80% of their respective microbial groups. The most significant positive correlations were observed between aceto/acidogenic microorganisms and final VFA concentrations with Pearson correlation factors of 0.91.
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Affiliation(s)
- Niema Afroze
- Civil and Environmental Engineering, University of Western Ontario, London, ON, Canada
| | - George Nakhla
- Civil and Environmental Engineering, University of Western Ontario, London, ON, Canada
- Chemical and Biochemical Engineering, University of Western Ontario, London, ON, Canada
| | - Mingu Kim
- Chemical and Biochemical Engineering, University of Western Ontario, London, ON, Canada
| | - Andisheh Yazdanpanah
- Civil and Environmental Engineering, University of Western Ontario, London, ON, Canada
- Black & Veatch, Markham, ON, Canada
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7
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Kundu R, Kunnoth B, Pilli S, Polisetty VR, Tyagi RD. Biochar symbiosis in anaerobic digestion to enhance biogas production: A comprehensive review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 344:118743. [PMID: 37572403 DOI: 10.1016/j.jenvman.2023.118743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/24/2023] [Accepted: 08/05/2023] [Indexed: 08/14/2023]
Abstract
In recent years, anaerobic digestion (AD) has gained popularity as a practical method for generating clean energy and efficiently managing organic waste. However, the effectiveness of the reactor is compromised by the accumulation of ammonia, acids, and nutrients, leading to inhibition and instability. Because of its adaptability, biochar (BC) has sparked a substantial interest in biogas production and can be created by charring biomass and waste materials. Adding BC to the AD process could yield the following benefits: mitigating toxic inhibition, reducing the duration of the methanogenic lag phase, immobilising functional bacteria, and enhancing the rate of electron transfer between methanogenic and acetogenic microorganisms. Nonetheless, there remains to be more comprehensive knowledge regarding the multifaceted function of BC and its intricate mechanisms in the generation of biogas in AD. The research summarises scattered information from the literature on BC production from various feedstocks and factors affecting its characteristics. Additionally, a comprehensive analysis of the utilisation of BC as an additive within AD is presented here, emphasising how BC characteristics impact AD processes and how they effectively engage key challenges.
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Affiliation(s)
- Ranarup Kundu
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India
| | - Bella Kunnoth
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India
| | - Sridhar Pilli
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India.
| | - Venkateswara Rao Polisetty
- Water and Environment Division, Department of Civil Engineering, National Institute of Technology, Warangal, Telangana, India.
| | - R D Tyagi
- BOSK Bioproducts, Quebec City, QC, Canada
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8
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Gupta R, Sethi S, Sahu R, Bharshankh A, Biswas R. Long-term effect of seasonal and constant low temperatures on mesophilic biomass treating sewage in continuously stirred tank anaerobic granular reactor. BIORESOURCE TECHNOLOGY 2023; 386:129471. [PMID: 37453660 DOI: 10.1016/j.biortech.2023.129471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/27/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023]
Abstract
A Continuously Stirred Tank Anaerobic Granular Reactor seeded with mesophilic biomass was studied for 1733 days analysing the impact of seasonal (12-23 °C) and controlled (8-15 °C) low temperatures on anaerobic treatment of sewage. Aided by intermittent dosing of 0.04% (v/v) methanol, the microbiota quickly adapted to temperature fluctuations. Chemical oxygen demand (COD) removal efficiency was high but low temperatures affected methane production. Under low-temperature stress, the Methanomythylovorans and Methanosaeta-dominated methanogenic community shifted focus to cellular repair and transport, with carbon diversion towards assimilative pathways, thereby decreasing methane yields. Specific methanogenic activity at 15 °C and 30 °C increased by five and four times, respectively, from their initial values indicating microbiota retained its mesophilic properties. Despite lower methane yield, stable and high COD removals, along with low dissolved methane and volatile fatty acids indicated that low-temperature anaerobic sewage treatment using mesophilic biomass in the long run is sustainable.
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Affiliation(s)
- Rohan Gupta
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India
| | - Shradhanjali Sethi
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Rojalin Sahu
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Ankita Bharshankh
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India
| | - Rima Biswas
- Wastewater Technology Division, CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra 440020, India; Academy of Scientific and Innovative Research (AcSIR), CSIR-Human Resource Development Centre (CSIR-HRDC), Ghaziabad 201002, India.
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9
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Sharma P, Parakh SK, Tsui TH, Bano A, Singh SP, Singh VP, Lam SS, Nadda AK, Tong YW. Synergetic anaerobic digestion of food waste for enhanced production of biogas and value-added products: strategies, challenges, and techno-economic analysis. Crit Rev Biotechnol 2023:1-21. [PMID: 37643972 DOI: 10.1080/07388551.2023.2241112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/18/2023] [Accepted: 06/22/2023] [Indexed: 08/31/2023]
Abstract
The generation of food waste (FW) is increasing at an alarming rate, contributing to a total of 32% of all the waste produced globally. Anaerobic digestion (AD) is an effective method for dealing with organic wastes of various compositions, like FW. Waste valorization into value-added products has increased due to the conversion of FW into biogas using AD technology. A variety of pathways are adopted by microbes to avoid unfavorable conditions in AD, including competition between sulfate-reducing bacteria and methane (CH4)-forming bacteria. Anaerobic bacteria decompose organic matter to produce biogas, a digester gas. The composition depends on the type of raw material and the method by which the digestion process is conducted. Studies have shown that the biogas produced by AD contains 65-75% CH4 and 35-45% carbon dioxide (CO2). Methanothrix soehngenii and Methanosaeta concilii are examples of species that convert acetate to CH4 and CO2. Methanobacterium bryantii, Methanobacterium thermoautotrophicum, and Methanobrevibacter arboriphilus are examples of species that produce CH4 from hydrogen and CO2. Methanobacterium formicicum, Methanobrevibacter smithii, and Methanococcus voltae are examples of species that consume formate, hydrogen, and CO2 and produce CH4. The popularity of AD has increased for the development of biorefinery because it is seen as a more environmentally acceptable alternative in comparison to physico-chemical techniques for resource and energy recovery. The review examines the possibility of using accessible FW to produce important value-added products such as organic acids (acetate/butyrate), biopolymers, and other essential value-added products.
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Affiliation(s)
- Pooja Sharma
- NUS Environmental Research Institute, National University of Singapore, Singapore
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore
| | - Sheetal Kishor Parakh
- NUS Environmental Research Institute, National University of Singapore, Singapore
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore
| | - To Hung Tsui
- NUS Environmental Research Institute, National University of Singapore, Singapore
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore
| | - Ambreen Bano
- Department of Biosciences, Faculty of Sciences, IIRC-3, Plant-Microbe Interaction, and Molecular Immunology Laboratory, Integral University, Lucknow, India
| | - Surendra Pratap Singh
- Department of Botany, Plant Molecular Biology Laboratory, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, India
| | - Vijay Pratap Singh
- Department of Botany, Plant Physiology Laboratory, C.M.P. Degree College, a Constituent Post Graduate College of University of Allahabad, Prayagraj, India
| | - Su Shiung Lam
- Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, Kuala Nerus, Terengganu, Malaysia
| | - Ashok Kumar Nadda
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
| | - Yen Wah Tong
- NUS Environmental Research Institute, National University of Singapore, Singapore
- Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore
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10
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Shang Z, Wang R, Zhang X, Tu Y, Sheng C, Yuan H, Wen L, Li Y, Zhang J, Wang X, Yang G, Feng Y, Ren G. Differential effects of petroleum-based and bio-based microplastics on anaerobic digestion: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162674. [PMID: 36894074 DOI: 10.1016/j.scitotenv.2023.162674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 02/22/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
The number of plastics is increasing owing to the rapid development of the plastics industry. Microplastics (MPs) are formed during the use of both petroleum-based plastics and newly developed bio-based plastics. These MPs are inevitably released into the environment and are enriched in wastewater treatment plant sludge. Anaerobic digestion is a popular sludge stabilization method for wastewater treatment plants. Understanding the potential impacts of different MPs on anaerobic digestion is critical. This paper provides a comprehensive review of the mechanisms of petroleum-based MPs and bio-based MPs in anaerobic digestion methane production and compares their potential effects on biochemical pathways, key enzyme activities, and microbial communities. Finally, it identifies problems that must be solved in the future, proposes the focus of future research, and predicts the future development direction of the plastics industry.
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Affiliation(s)
- Zezhou Shang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Rui Wang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Xiyi Zhang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Yongle Tu
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China
| | - Chenjing Sheng
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Huan Yuan
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Lei Wen
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Yulu Li
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Jing Zhang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Xiaojiao Wang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China.
| | - Gaihe Yang
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Yongzhong Feng
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
| | - Guangxin Ren
- College of Agronomy, Northwest A & F University, Yangling 712100, Shaanxi, China; Shaanxi Engineering Research Center of Circular Agriculture, Yangling 712100, Shaanxi, China
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11
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Jin Y, Lu Y. Syntrophic Propionate Oxidation: One of the Rate-Limiting Steps of Organic Matter Decomposition in Anoxic Environments. Appl Environ Microbiol 2023; 89:e0038423. [PMID: 37097179 PMCID: PMC10231205 DOI: 10.1128/aem.00384-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023] Open
Abstract
Syntrophic propionate oxidation is one of the rate-limiting steps during anaerobic decomposition of organic matter in anoxic environments. Syntrophic propionate-oxidizing bacteria (SPOB) are members of the "rare biosphere" living at the edge of the thermodynamic limit in most natural habitats. Hitherto, only 10 bacterial species capable of syntrophic propionate oxidization have been identified. SPOB employ different metabolisms for propionate oxidation (e.g., methylmalonyl-CoA pathway and C6 dismutation pathway) and show diverse life strategies (e.g., obligately and facultatively syntrophic lifestyle). The flavin-based electron bifurcation/confurcation (FBEB/C) systems have been proposed to help solve the thermodynamic dilemma during the formation of the low-potential products H2 and formate. Molecular ecological approaches, such as DNA stable isotope probing (DNA-SIP) and metagenomics, have been used to detect SPOB in natural environments. Furthermore, the biogeographical pattern of SPOB has been recently described in paddy soils. A comprehensive understanding of SPOB is essential for better predicting and managing organic matter decomposition and carbon cycling in anoxic environments. In this review, we described the critical role of syntrophic propionate oxidation in anaerobic decomposition of organic matter, phylogenetic and metabolic diversity, life strategies and ecophysiology, composition of syntrophic partners, and pattern of biogeographic distribution of SPOB in natural environments. We ended up with a few perspectives for future research.
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Affiliation(s)
- Yidan Jin
- College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Yahai Lu
- College of Urban and Environmental Sciences, Peking University, Beijing, China
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Mu L, Wang Y, Xu F, Li J, Tao J, Sun Y, Song Y, Duan Z, Li S, Chen G. Emerging Strategies for Enhancing Propionate Conversion in Anaerobic Digestion: A Review. Molecules 2023; 28:3883. [PMID: 37175291 PMCID: PMC10180298 DOI: 10.3390/molecules28093883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/18/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Anaerobic digestion (AD) is a triple-benefit biotechnology for organic waste treatment, renewable production, and carbon emission reduction. In the process of anaerobic digestion, pH, temperature, organic load, ammonia nitrogen, VFAs, and other factors affect fermentation efficiency and stability. The balance between the generation and consumption of volatile fatty acids (VFAs) in the anaerobic digestion process is the key to stable AD operation. However, the accumulation of VFAs frequently occurs, especially propionate, because its oxidation has the highest Gibbs free energy when compared to other VFAs. In order to solve this problem, some strategies, including buffering addition, suspension of feeding, decreased organic loading rate, and so on, have been proposed. Emerging methods, such as bioaugmentation, supplementary trace elements, the addition of electronic receptors, conductive materials, and the degasification of dissolved hydrogen, have been recently researched, presenting promising results. But the efficacy of these methods still requires further studies and tests regarding full-scale application. The main objective of this paper is to provide a comprehensive review of the mechanisms of propionate generation, the metabolic pathways and the influencing factors during the AD process, and the recent literature regarding the experimental research related to the efficacy of various strategies for enhancing propionate biodegradation. In addition, the issues that must be addressed in the future and the focus of future research are identified, and the potential directions for future development are predicted.
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Affiliation(s)
- Lan Mu
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
| | - Yifan Wang
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Fenglian Xu
- School of Biotechnology and Food Science, Tianjin University of Commerce, Tianjin 300134, China
| | - Jinhe Li
- Tianjin Capital Environmental Protection Group Co., Ltd., Tianjin 300133, China
| | - Junyu Tao
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
| | - Yunan Sun
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
| | - Yingjin Song
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China;
| | - Zhaodan Duan
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
| | - Siyi Li
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
| | - Guanyi Chen
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China; (L.M.)
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13
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Leca E, Zennaro B, Hamelin J, Carrère H, Sambusiti C. Use of additives to improve collective biogas plant performances: A comprehensive review. Biotechnol Adv 2023; 65:108129. [PMID: 36933869 DOI: 10.1016/j.biotechadv.2023.108129] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 02/28/2023] [Accepted: 03/13/2023] [Indexed: 03/17/2023]
Abstract
Nowadays, anaerobic digestion (AD) is being increasingly encouraged to increase the production of biogas and thus of biomethane. Due to the high diversity among feedstocks used, the variability of operating parameters and the size of collective biogas plants, different incidents and limitations may occur (e.g., inhibitions, foaming, complex rheology). To improve performance and overcome these limitations, several additives can be used. This literature review aims to summarize the effects of the addition of various additives in co-digestion continuous or semi-continuous reactors to fit as much as possible with collective biogas plant challenges. The addition of (i) microbial strains or consortia, (ii) enzymes and (iii) inorganic additives (trace elements, carbon-based materials) in digester is analyzed and discussed. Several challenges associated with the use of additives for AD process at collective biogas plant scale requiring further research work are highlighted: elucidation of mechanisms, dosage and combination of additives, environmental assessment, economic feasibility, etc.
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Affiliation(s)
- Estelle Leca
- TotalEnergies, CSTJF, Centre Scientifique et Technique Jean Féger, Av. Larribau, 64000 Pau, France
| | - Bastien Zennaro
- INRAE Transfert, 60 Rue Nicolas Leblanc, 11100 Narbonne, France
| | - Jérôme Hamelin
- INRAE, Univ Montpellier, LBE, 102 Avenue des Etangs, 11100 Narbonne, France
| | - Hélène Carrère
- INRAE, Univ Montpellier, LBE, 102 Avenue des Etangs, 11100 Narbonne, France
| | - Cecilia Sambusiti
- TotalEnergies, CSTJF, Centre Scientifique et Technique Jean Féger, Av. Larribau, 64000 Pau, France.
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Application of Bioelectrochemical Systems and Anaerobic Additives in Wastewater Treatment: A Conceptual Review. Int J Mol Sci 2023; 24:ijms24054753. [PMID: 36902185 PMCID: PMC10003464 DOI: 10.3390/ijms24054753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/25/2023] [Accepted: 02/28/2023] [Indexed: 03/06/2023] Open
Abstract
The interspecies electron transfer (IET) between microbes and archaea is the key to how the anaerobic digestion process performs. However, renewable energy technology that utilizes the application of a bioelectrochemical system together with anaerobic additives such as magnetite-nanoparticles can promote both direct interspecies electron transfer (DIET) as well as indirect interspecies electron transfer (IIET). This has several advantages, including higher removal of toxic pollutants present in municipal wastewater, higher biomass to renewable energy conversion, and greater electrochemical efficiencies. This review explores the synergistic influence of bioelectrochemical systems and anaerobic additives on the anaerobic digestion of complex substrates such as sewage sludge. The review discussions present the mechanisms and limitations of the conventional anaerobic digestion process. In addition, the applicability of additives in syntrophic, metabolic, catalytic, enzymatic, and cation exchange activities of the anaerobic digestion process are highlighted. The synergistic effect of bio-additives and operational factors of the bioelectrochemical system is explored. It is elucidated that a bioelectrochemical system coupled with nanomaterial additives can increase biogas-methane potential compared to anaerobic digestion. Therefore, the prospects of a bioelectrochemical system for wastewater require research attention.
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Feng L, He S, Gao Z, Zhao W, Jiang J, Zhao Q, Wei L. Mechanisms, performance, and the impact on microbial structure of direct interspecies electron transfer for enhancing anaerobic digestion-A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 862:160813. [PMID: 36502975 DOI: 10.1016/j.scitotenv.2022.160813] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/22/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Direct interspecies electron transfer (DIET) has been received tremendous attention, recently, due to the advantages of accelerating methane production via organics reduction during anaerobic digestion (AD) process. DIET-based syntrophic relationships not only occurred with the existence of pili and some proteins in the microorganism, but also can be conducted by conductive materials. Therefore, more researches into understanding and strengthening DIET-based syntrophy have been conducted with the aim of improving methanogenesis kinetics and further enhance methane productivity in AD systems. This study summarized the mechanisms, application and microbial structures of typical conductive materials (carbon-based materials and iron-based materials) during AD reactors operation. Meanwhile, detail analysis of studies on DIET (from substrates, dosage and effectiveness) via conductive materials was also presented in the study. Moreover, the challenges of applying conductive materials in boosting methane production were also proposed, which was supposed to provide a deep insight in DIET for full scale application.
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Affiliation(s)
- Likui Feng
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shufei He
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Zhelu Gao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Weixin Zhao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Junqiu Jiang
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Qingliang Zhao
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Liangliang Wei
- State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), Harbin 150090, China; School of Environment, Harbin Institute of Technology, Harbin 150090, China.
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Jaman K, Idrus S, Wahab AMA, Harun R, Daud NNN, Ahsan A, Shams S, Uddin MA. Influence of Molasses Residue on Treatment of Cow Manure in an Anaerobic Filter with Perforated Weed Membrane and a Conventional Reactor: Variations of Organic Loading and a Machine Learning Application. MEMBRANES 2023; 13:159. [PMID: 36837662 PMCID: PMC9966026 DOI: 10.3390/membranes13020159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 01/16/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
This study highlighted the influence of molasses residue (MR) on the anaerobic treatment of cow manure (CM) at various organic loading and mixing ratios of these two substrates. Further investigation was conducted on a model-fitting comparison between a kinetic study and an artificial neural network (ANN) using biomethane potential (BMP) test data. A continuous stirred tank reactor (CSTR) and an anaerobic filter with a perforated membrane (AF) were fed with similar substrate at the organic loading rates of (OLR) 1 to OLR 7 g/L/day. Following the inhibition signs at OLR 7 (50:50 mixing ratio), 30:70 and 70:30 ratios were applied. Both the CSTR and the AF with the co-digestion substrate (CM + MR) successfully enhanced the performance, where the CSTR resulted in higher biogas production (29 L/d), SMP (1.24 LCH4/gVSadded), and VS removal (>80%) at the optimum OLR 5 g/L/day. Likewise, the AF showed an increment of 69% for biogas production at OLR 4 g/L/day. The modified Gompertz (MG), logistic (LG), and first order (FO) were the applied kinetic models. Meanwhile, two sets of ANN models were developed, using feedforward back propagation. The FO model provided the best fit with Root Mean Square Error (RMSE) (57.204) and correlation coefficient (R2) 0.94035. Moreover, implementing the ANN algorithms resulted in 0.164 and 0.97164 for RMSE and R2, respectively. This reveals that the ANN model exhibited higher predictive accuracy, and was proven as a more robust system to control the performance and to function as a precursor in commercial applications as compared to the kinetic models. The highest projection electrical energy produced from the on-farm scale (OFS) for the AF and the CSTR was 101 kWh and 425 kWh, respectively. This investigation indicates the high potential of MR as the most suitable co-substrate in CM treatment for the enhancement of energy production and the betterment of waste management in a large-scale application.
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Affiliation(s)
- Khairina Jaman
- Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Syazwani Idrus
- Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Abdul Malek Abdul Wahab
- School of Mechanical Engineering, College of Engineering, Universiti Teknologi MARA, Shah Alam 40450, Malaysia
| | - Razif Harun
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Nik Norsyahariati Nik Daud
- Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang 43400, Malaysia
| | - Amimul Ahsan
- Department of Civil and Environmental Engineering, Islamic University of Technology (IUT), Gazipur 1704, Bangladesh
- Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne, VIC 3000, Australia
| | - Shahriar Shams
- Faculty of Engineering, Universiti Teknologi Brunei, Gadong BE1410, Brunei
| | - Md. Alhaz Uddin
- Department of Civil Engineering, College of Engineering, Jouf University, Sakaka 42421, Saudi Arabia
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17
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Abid N, Karray F, Kallel I, Slim M, Barakat A, Mhiri N, Chamkha M, Sayadi S. Role of biochar in anaerobic microbiome enrichment and methane production enhancement during olive mill wastewater biomethanization. Front Bioeng Biotechnol 2023; 10:1100533. [PMID: 36686251 PMCID: PMC9846136 DOI: 10.3389/fbioe.2022.1100533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/08/2022] [Indexed: 01/05/2023] Open
Abstract
The current research work attempted to investigate, for the first time, the impact of biochar addition, on anaerobic digestion of olive mill wastewater with different initial chemical oxygen demand loads in batch cultures (10 g/L, 15 g/L, and 20 g/L). Methane yields were compared by applying one-way analysis of variance (ANOVA) followed by post-hoc Tukey's analysis. The results demonstrated that adding at 5 g/L biochar to olive mill wastewater with an initial chemical oxygen demand load of 20 g/L increased methane yield by 97.8% and mitigated volatile fatty acid accumulation compared to the control batch. According to the results of microbial community succession revealed by the Illumina amplicon sequencing, biochar supplementation significantly increased diversity of the microbial community and improved the abundance of potential genera involved in direct interspecies electron transfer, including Methanothrix and Methanosarcina. Consequently, biochar can be a promising alternative in terms of the recovery of metabolic activity during anaerobic digestion of olive mill wastewater at a large scale.
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Affiliation(s)
- Nozha Abid
- Laboratory of Environmental Bioprocesses, Center of Biotechnology of Sfax, Sfax, Tunisia,*Correspondence: Nozha Abid, ; Sami Sayadi,
| | - Fatma Karray
- Laboratory of Environmental Bioprocesses, Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Imen Kallel
- Research Laboratory of Environmental Toxicology-Microbiology and Health (LR17ES06), Faculty of Sciences, University of Sfax, Sfax, Tunisia
| | - Mariam Slim
- Laboratory of Environmental Bioprocesses, Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Abdellatif Barakat
- IATE, Montpellier University, INRAE, Agro Institut, Montpellier, France,Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco
| | - Najla Mhiri
- Laboratory of Environmental Bioprocesses, Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Mohamed Chamkha
- Laboratory of Environmental Bioprocesses, Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Sami Sayadi
- Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha, Qatar,*Correspondence: Nozha Abid, ; Sami Sayadi,
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18
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Johnravindar D, Kumar R, Luo L, Jun Z, Manu MK, Wang H, Wong JWC. Influence of inoculum-to-substrate ratio on biogas enhancement during biochar-assisted co-digestion of food waste and sludge. ENVIRONMENTAL TECHNOLOGY 2023:1-13. [PMID: 36546529 DOI: 10.1080/09593330.2022.2161949] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
High accumulation of volatile fatty acids (VFAs) is one of the major concerns during mesophilic anaerobic co-digestion of food waste (FW) and sewage sludge (SS). Therefore, improving the stability of the anaerobic digestion process could surpass quick acidification while accelerating methanogenesis. In this study, the suitability of biochar-assisted co-digestion was evaluated at different inoculum and substrate ratios (I/S ratios: 0.1, 0.3, 0.6, and 0.9). The maximum methane yield of 256.85 mL/gVSadd was observed at an I/S ratio of 0.6. The results indicated fast volatile solid removal (∼ 47.17% to 73%) and a critical role of biochar addition in alleviating the underlying inhibitions. Substantial changes in the microbial community composition including Methanosata, Methanobrevibacter, and Methanosarcina were also observed which predominated and stabilised the methanogenesis process at higher I/S ratios. These results emphasised that the anaerobic co-digestion of FW/sludge is a promising approach, wherein the biochar amendment at different I/S ratios should be well maintained to avoid inhibitions from excess microbial VFA acidification of organic waste feedstocks.
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Affiliation(s)
- Davidraj Johnravindar
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | - Rajat Kumar
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | - Liwen Luo
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | - Zhao Jun
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | - M K Manu
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
| | - Hailong Wang
- School of Environmental and Chemical Engineering, Foshan University, Foshan, People's Republic of China
| | - Jonathan W C Wong
- Department of Biology, Institute of Bioresource and Agriculture, Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong
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19
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Huang Y, Cai B, Dong H, Li H, Yuan J, Xu H, Wu H, Xu Z, Sun D, Dang Y, Holmes DE. Enhancing anaerobic digestion of food waste with granular activated carbon immobilized with riboflavin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 851:158172. [PMID: 35988634 DOI: 10.1016/j.scitotenv.2022.158172] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 06/15/2023]
Abstract
Previous studies have shown that anaerobic digestion of food waste can be enhanced by addition of conductive materials that stimulate direct interspecies electron transfer (DIET) between bacteria and methanogens. However, at extremely high organic loading rates (OLRs), volatile fatty acids (VFAs) still tend to accumulate even in the presence of conductive materials because of an imbalance between the formation of fermentation products and the rate of methanogenesis. In this study, granular activated carbon (GAC) immobilized with riboflavin (GAC-riboflavin) was added to an anaerobic digester treating food waste. The GAC-riboflavin reactor operated stably at OLRs as high as 11.5 kgCOD/ (m3·d) and kept VFA concentrations below 69.4 mM, COD removal efficiencies, methane production rates, and biogas methane concentrations were much higher in the GAC-riboflavin reactor than the GAC- and non-amended reactors. Transcripts associated with genes that code for proteins involved in DIET based metabolism were somewhat more highly expressed by Methanothrix in the GAC-riboflavin reactor. However, it is unlikely that riboflavin acted as an electron shuttle to stimulate DIET. Rather, it seemed to provide nutrients that enhanced the growth of microorganisms involved in the anaerobic digestion process, including those that are capable of DIET.
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Affiliation(s)
- Yinhui Huang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Boquan Cai
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - He Dong
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Haoyong Li
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Jie Yuan
- Wukong Chuangxiang Techolology Co, Ltd, Beijing 100083, China
| | - Haiyu Xu
- Xinneng Qinglin (Beijing) Technology Co., Ltd, Beijing 100083, China
| | - Hongbin Wu
- Xinneng Qinglin (Beijing) Technology Co., Ltd, Beijing 100083, China
| | - Ziyao Xu
- Lingxi Medical Technology (Beijing) Co., Ltd, Beijing 100083, China
| | - Dezhi Sun
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China
| | - Yan Dang
- Beijing Key Laboratory for Source Control Technology of Water Pollution, Engineering Research Center for Water Pollution Source Control and Eco-remediation, College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China.
| | - Dawn E Holmes
- Department of Physical and Biological Sciences, Western New England University, 1215 Wilbraham Rd, Springfield, MA 01119, USA
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20
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Zhu R, Zhang Y, Zou H, Zheng Y, Guo RB, Fu SF. Understanding the mechanisms behind enhanced anaerobic digestion of corn straw by humic acids. BIORESOURCE TECHNOLOGY 2022; 359:127454. [PMID: 35697261 DOI: 10.1016/j.biortech.2022.127454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 06/15/2023]
Abstract
Humic acids (HAs) are abundant on earth, yet their effects on anaerobic digestion (AD) of cellulosic substrate are not fully uncovered. The effects of HAs on AD of corn straw and the mechanisms behind were analyzed in this study. Results showed that the effects of HAs on methane yield were closely related to the total solids (TS) content. At relative high TS content of 5.0%, HAs benefited AD process by increasing 13.8% of methane yield, accelerating methane production rate by 43% and shortening lag phase time by 37.5%. Microbial community analysis indicated that HAs increased the relative abundance of syntrophic bacteria (Syntrophomonadaceae and Synergistaceae), facilitating the degradation of volatile fatty acids. HAs might act as electron shuttles to directly transfer electrons to hydrogenotrophic methanogens for CO2 reduction to CH4. This study provides a simple and efficient strategy to facilitate the AD of cellulosic substrate by HAs addition.
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Affiliation(s)
- Rong Zhu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province 214122, PR China; Department of Grain Science and Industry, Kansas State University, Manhattan, KS 66506, United States.
| | - Yun Zhang
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Hua Zou
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province 214122, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, PR China
| | - Yi Zheng
- Department of Grain Science and Industry, Kansas State University, Manhattan, KS 66506, United States
| | - Rong-Bo Guo
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, NO. 189 Songling Road, Qingdao 266101, PR China
| | - Shan-Fei Fu
- Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Civil Engineering, Jiangnan University, Wuxi, Jiangsu Province 214122, PR China; Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, NO. 189 Songling Road, Qingdao 266101, PR China.
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21
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Wang S, Xu C, Song L, Zhang J. Anaerobic Digestion of Food Waste and Its Microbial Consortia: A Historical Review and Future Perspectives. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19159519. [PMID: 35954875 PMCID: PMC9367938 DOI: 10.3390/ijerph19159519] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 02/04/2023]
Abstract
Renewable energy source, such as food waste (FW), has drawn great attention globally due to the energy crisis and the environmental problem. Anaerobic digestion (AD) mediated by novel microbial consortia is widely used to convert FW to clean energy. Despite of the considerable progress on food waste and FWAD optimization condition in recent years, a comprehensive and predictive understanding of FWAD microbial consortia is absent and therefore represents a major research challenge in FWAD. The review begins with a global view on the FWAD status and is followed by an overview of the role of AD key conditions’ association with microbial community variation during the three main energy substances (hydrogen, organic acids, and methane) production by FWAD. The following topic is the historical understanding of the FWAD microorganism through the development of molecular biotechnology, from classic strain isolation to low-throughput sequencing technologies, to high-throughput sequencing technologies, and to the combination of high-throughput sequencing and isotope tracing. Finally, the integration of multi-omics for better understanding of the microbial community activity and the synthetic biology for the manipulation of the functioning microbial consortia during the FWAD process are proposed. Understanding microbial consortia in FWAD helps us to better manage the global renewable energy source.
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Affiliation(s)
- Shuijing Wang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230039, China;
| | - Chenming Xu
- College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China;
| | - Liyan Song
- School of Resources and Environmental Engineering, Anhui University, Hefei 230039, China;
- Correspondence: (L.S.); (J.Z.); Tel.: +86-55163861441 (L.S.); +86-55163828252 (J.Z.); Fax: +86-55163861724 (L.S.); +86-55163828252 (J.Z.)
| | - Jin Zhang
- College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China;
- Correspondence: (L.S.); (J.Z.); Tel.: +86-55163861441 (L.S.); +86-55163828252 (J.Z.); Fax: +86-55163861724 (L.S.); +86-55163828252 (J.Z.)
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22
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Zhou H, Xing D, Ma J, Su Y, Zhang Y. Electrifying anaerobic granular sludge for enhanced waste anaerobic digestion and biogas production. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Effects of Iron-Loaded Biochar on the Anaerobic Co-Digestion of Food Waste and Sewage Sludge and Elucidating the Mechanism Thereof. SUSTAINABILITY 2022. [DOI: 10.3390/su14159442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The inhibition of volatile fatty acid (VFA) production is an important factor affecting biogas (methane) production in the anaerobic co-digestion systems comprising food waste and sewage sludge. In this study, batch experiments were conducted at medium temperature (36 ± 0.5 °C), during which the biogas production index and material–liquid characteristic parameters of the anaerobic digestion systems containing different concentrations of iron-loaded biochar (Fe-BC) were monitored. The cumulative biogas production data were analyzed using a modified Gompertz kinetic model to determine the effect of the Fe-BC on biogas production in the anaerobic co-digestion system. Studies have shown that addition of Fe-BC does not significantly influence the hydrolysis and acidification stages of anaerobic co-digestion, but does have a significant effect on promoting methanogenesis by alleviating the accumulation of VFAs and improving both the buffer capacity of the system and the efficiency of substrate-to-biogas conversion. When the Fe-BC concentration was 16 g·L−1, the cumulative biogas production reached 329.42 mL·g-VS−1, which was 49.7% higher than the blank group, and the lag period was 3.55 d, which was 42% shorter than the blank group. Mechanistic studies have shown that Fe-BC increased the concentration of coenzyme F420 and the conductivity of the digestate in the co-digestion system, which increased the activity of methanogens in the anaerobic digestion system, thereby promoting methanogenesis.
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24
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Ziganshina EE, Ziganshin AM. Anaerobic Digestion of Chicken Manure in the Presence of Magnetite, Granular Activated Carbon, and Biochar: Operation of Anaerobic Reactors and Microbial Community Structure. Microorganisms 2022; 10:microorganisms10071422. [PMID: 35889142 PMCID: PMC9323702 DOI: 10.3390/microorganisms10071422] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/07/2022] [Accepted: 07/08/2022] [Indexed: 02/06/2023] Open
Abstract
The influence of magnetite nanoparticles, granular activated carbon (GAC), and biochar, as well as their combinations on the anaerobic digestion of chicken manure and the structure of microbial communities was studied. The addition of magnetite, GAC, and biochar increased the rate of methane production and the total methane yield. It has been observed that these additives stimulated anaerobic microorganisms to reduce the concentration of accumulated volatile organic acids. Various bacterial species within the classes Bacteroidia and Clostridia were found at higher levels in the anaerobic reactors but in different proportions depending on the experiment. Members of the genera Methanosarcina, Methanobacterium, Methanothrix, and Methanoculleus were mainly detected within the archaeal communities in the anaerobic reactors. Compared to the 16S rRNA gene-based study, the mcrA gene approach allowed a higher level of Methanosarcina in the system with GAC + magnetite to be detected. Based on our findings, the combined use of granular activated carbon and magnetite at appropriate dosages will improve biomethane production.
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25
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Wang S, Kong D, Zhang K, Chang X, Lu Z, Du L. Effectiveness of layered inoculation in solid-state anaerobic co-digestion of pig manure and corn straw: Focus on macro-, micro-, and genetic-levels. BIORESOURCE TECHNOLOGY 2022; 355:127262. [PMID: 35526720 DOI: 10.1016/j.biortech.2022.127262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/29/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
Layered inoculation can achieve rapid start-up and promote methanation performance of anaerobic digesters. Daily specific methane yield (SMY) rapidly increased to 2.93 mL/g VS/d during 0-13 days, and cumulative SMY reached 212 mL/g VS in the solid-state anaerobic co-digestion (SS-AcoD) of pig manure and corn straw. Data were collected at macro-, micro-, and genetic-levels of each substrate layer. The results showed that layered inoculation could improve volatile fatty acids utilization and prevent adverse effects of high total ammonium nitrogen concentrations. Layered inoculation accelerated hydrolysis, acidification, and methanogenesis of substrates, as evidenced by the efficient inoculation of Bacteroidetes, Anaerolineales, Methanosphaerula, and Methanothrix, which were primarily from inocula. The various stages of SS-AcoD were synergistically initiated during the first 13 days, and acetoclastic pathway was boosted. These results further explain why layered inoculation is an efficient method for improving methanation performance of SS-AcoD and achieving efficient utilization of organic solid waste.
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Affiliation(s)
- Siqi Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Dewang Kong
- Hangzhou Energy Environmental Engineering Ltd, Hangzhou 310020, China
| | - Keqiang Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Xingping Chang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Zhenwei Lu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Lianzhu Du
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
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26
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Wu N, Liu T, Li Q, Quan X. Enhancing anaerobic methane production in integrated floating-film activated sludge system filled with novel MWCNTs-modified carriers. CHEMOSPHERE 2022; 299:134483. [PMID: 35381266 DOI: 10.1016/j.chemosphere.2022.134483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 03/23/2022] [Accepted: 03/29/2022] [Indexed: 06/14/2023]
Abstract
Conductive materials can enhance anaerobic methane production by accelerating interspecies electron transfer between electroactive bacteria and methanogens. However, the daily loss or less specific surface area of small/big size of conductive materials always limits their application in anaerobic digestion. In this study, the conductive multi-walled carbon nanotubes (MWCNTs) (15 wt% and 20 wt%) were mixed with high-density polyethylene (HDPE) and novel conductive suspended carriers were prepared. Results showed the conductivity of the novel conductive suspended carriers increased by 1-2 orders of magnitude comparing with HDPE carriers, as well as the attached biomass improved from 3.93 g/m2 (HDPE carriers) to 5.82 g/m2 (15 wt% MWCNTs-modified carriers) and 6.67 g/m2 (20 wt% MWCNTs-modified carriers). Integrated floating-film activated sludge (IFFAS) filled with MWCNT-modified carriers showed significant advantages in chemical oxygen demand (COD) removal (removal efficiency increased by 3.6-37.2%) and methanogenic performance (cumulative methane increased by 12.28-62.91%) compared with the control reactor filled with conventional HDPE carriers when treating sodium propionate wastewater at the organic loading rates (OLR) of 11.3-26.3 kg COD/(m³∙d). SEM images and high-throughput sequencing results proved potential direct interspecies electron transfer (DIET) had been established successfully on the MWCNTs-modified carriers. The syntrophic electroactive bacteria (Geobacter, Thauera) and Methanotrix were enriched by 2.28-4.58% and 9.41-16.80% respectively owning to the addition of novel conductive carriers. This study proved IFFAS process filled with novel MWCNTs-modified suspended carriers showed great potential in establishing DIET to enhance anaerobic digestion in practical application.
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Affiliation(s)
- Nan Wu
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Tao Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China.
| | - Qian Li
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China
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27
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Muratçobanoğlu H, Begüm Gökçek Ö, Muratçobanoğlu F, Mert RA, Demirel S. Biomethane enhancement using reduced graphene oxide in anaerobic digestion of municipal solid waste. BIORESOURCE TECHNOLOGY 2022; 354:127163. [PMID: 35429595 DOI: 10.1016/j.biortech.2022.127163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 04/09/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
The present research investigated the impact of reduced graphene oxide (rGO) addition on the semi-continuous anaerobic digestion of the organic fraction of municipal solid waste (OFMSW) in the range of 0.5-10 gVolatileSolid(VS)/Lreactorday organic loading rates (OLR). Adding rGO enhanced the rate and yield of biomethane production, and the maximum biomethane increment rate was obtained as 110% at an OLR of 4.0 gVS/Lreactorday. However, after increasing the OLR to 6 gVS/Lreactorday, there was a dramatic decrease in biomethane production because of volatile fatty acid (VFA) accumulation. Methanotrix is the predominant archaeal genus at OLRs lower than 6 gVS/Lreactorday in reactors (89-97%). An increment in biomethane production was associated with the higher abundance of the Methanothrix genus in the rGO-supported reactor (rG) than in the control reactor (rC).
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Affiliation(s)
- Hamdi Muratçobanoğlu
- Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey.
| | - Öznur Begüm Gökçek
- Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey; Department of Energy Science and Technologies, Nigde Omer Halisdemir University, Nigde 51240, Turkey
| | - Fatma Muratçobanoğlu
- Department of Environmental Engineering, Erciyes University, Kayseri 38039, Turkey
| | - Ruhullah Ali Mert
- Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey
| | - Sevgi Demirel
- Department of Environmental Engineering, Nigde Omer Halisdemir University, Nigde 51240, Turkey; Department of Energy Science and Technologies, Nigde Omer Halisdemir University, Nigde 51240, Turkey
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28
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Dang H, Yu N, Mou A, Zhang L, Guo B, Liu Y. Metagenomic insights into direct interspecies electron transfer and quorum sensing in blackwater anaerobic digestion reactors supplemented with granular activated carbon. BIORESOURCE TECHNOLOGY 2022; 352:127113. [PMID: 35381332 DOI: 10.1016/j.biortech.2022.127113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 06/14/2023]
Abstract
The addition of granular activated carbon (GAC) enhanced the performance of up-flow anaerobic sludge blanket (UASB) reactor treating blackwater at 35 °C. DNA were extracted from the sludge and biofilms attached to GAC and submitted for shotgun sequencing. In addition, the acyl-homoserine lactones (AHLs) were quantified. Diverse partners for direct interspecies electron transfer (DIET) were enriched in the sludge or biofilm (GAC-biofilm) of GAC amended UASB. Pedosphaera parvula, Syntrophus aciditrophicus and Syntrophorhabus aromaticivorans were dominant syntrophs. The analysis for type IV pilus assembly genes further suggested DIET may be functioned through GAC for GAC-biofilm, while through conductive pili for sludge aggregates. AHLs quantification and the analysis for quorum sensing (QS) related genes indicated higher QS activity at the population level was induced by GAC. Overall, the work illustrated the different DIET patterns, and suggested that QS played an important role in controlling the performance in GAC amended USAB.
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Affiliation(s)
- Hongyu Dang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Najiaowa Yu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Anqi Mou
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Bing Guo
- Centre for Environmental Health and Engineering (CEHE), Department of Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, United Kingdom.
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
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29
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Gao T, Zhang H, Xu X, Teng J. Mutual effects of CO 2 absorption and H 2-mediated electromethanogenesis triggering efficient biogas upgrading. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 818:151732. [PMID: 34826488 DOI: 10.1016/j.scitotenv.2021.151732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/01/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Anaerobic digestion coupled with bioelectrochemical system (BES) is a promising approach for biogas upgrading with low energy input. However, the alkalinity generation from electromethanogenesis is invariably ignored which could serve as a potential assistant for CO2 removal through the transformation into dissolved inorganic carbon (DIC). Herein, a novel bioelectrochemical CO2 conversion in the methanogenic BES was proposed based on active CO2 capture and in-situ microbial utilization. It was found that the BES using a stainless steel/carbon felt hybrid biocathode (BES-SSCF reactor) achieved a CH4 yield of 0.33 ± 0.03 LCH4/gCODremoval and increased CH4 production rate by 28.3% of BES-CF reactor at 1.0 V applied voltage. As the experiment progressed, CH4 content increased to 93.1% and CO2 content in the upgraded biogas maintained at below 3%. The continuous proton consumption from H2 evolution reaction in the hybrid biocathode was capable of creating a slightly alkaline condition in the BES-SSCF reactor and thereby the CO2 capture as bicarbonate was enhanced through endogenous alkalinity absorption. Microbial community analysis revealed that significant enrichment of Methanobacterium and Methanosarcina at the BES-SSCF cathodic biofilm was favorable for bicarbonate reduction into CH4 via establishment of H2-mediated electron transfer. Consequently, the remained CO2 and DIC only accounted for 12% of total carbon in the BES-SSCF reactor and the high conversion rate of CO2 to CH4 (82.3%) was achieved. These results unraveled an innovative CO2 utilization mechanism integrating CO2 absorption with H2-mediated electromethanogenesis.
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Affiliation(s)
- Tianyu Gao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, PR China
| | - Hanmin Zhang
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, PR China.
| | - Xiaotong Xu
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, PR China
| | - Jiaheng Teng
- Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, PR China
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30
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Zhang L, Zhang Y, Yuan Y, Mou A, Park S, Liu Y. Impacts of granular activated carbon addition on anaerobic granulation in blackwater treatment. ENVIRONMENTAL RESEARCH 2022; 206:112406. [PMID: 34838566 DOI: 10.1016/j.envres.2021.112406] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 11/14/2021] [Accepted: 11/15/2021] [Indexed: 06/13/2023]
Abstract
Upflow anaerobic sludge blanket (UASB) reactors, with or without granular activated carbon (GAC) amendment, were applied for blackwater treatment. The impact of GAC on the formation of granules and biomethane recovery was assessed. High organic loading rates (OLRs) up to 15.7 ± 2.1 kg COD/(m3d) were achieved with both reactors. Similar chemical oxygen demand (COD) removal and methane production rate were observed with OLRs ranging from 5.1 ± 1.0 to 9.3 ± 1.5 kg COD/(m3d). Under higher OLR conditions (13.6 ± 1.1 to 15.7 ± 2.1 kg COD/(m3d)), the GAC-amended UASB achieved a higher COD reduction than the UASB without GAC addition. Interestingly, volatile suspended solids (VSS) concentrations, granule size, and extracellular polymeric substance concentrations were lower in the GAC-amended UASB reactor as compared to the UASB without GAC. The methanogenesis activity of the granules in the GAC-amended UASB reactor was significantly higher than the methanogenesis activity of the UASB granules. The microbes o_Bacteroidales and Syntrophus were predominant in both reactors. The acetoclastic methanogens dominated in the UASB reactor without GAC addition; while hydrogenotrophic methanogens dominated in the GAC-UASB reactor. A phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) indicated that syntrophic acetate oxidation improved with GAC addition. The co-occurrence network indicated that interactions between dominant bacteria and archaea were higher in the GAC-amended UASB reactor than in the UASB reactor without GAC addition. This study demonstrated the improved blackwater treatment performance as a result of granulation in UASB with the addition of GAC.
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Affiliation(s)
- Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Yingdi Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Yiyang Yuan
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Anqi Mou
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Sunyong Park
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Canada.
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31
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Zhao Y, Mu H, Su Y, Zhang Y, Qiao X, Zhao C. Promotion of granular activated carbon on methanogenesis of readily acidogenic carbohydrate-rich waste at low inoculation ratio. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 817:152642. [PMID: 34968585 DOI: 10.1016/j.scitotenv.2021.152642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/15/2021] [Accepted: 12/19/2021] [Indexed: 06/14/2023]
Abstract
Although granular activated carbon (GAC) supplementation into food waste anaerobic digestion system is an efficient means to enhance methane production. As yet, little is known whether GAC supplementation is suitable for the extreme condition of pH below 4.5, which occurs in the use of readily acidogenic carbohydrate-rich waste (RACW) as methanogenic substrate when at low inoculation/substrate (I/S) ratio. This study investigated the effects of GAC on RACW anaerobic digestion under different inoculation/substrate (I/S) ratios. It was found that the addition of GAC was a preferred alternative method to enhancing I/S ratio for promoting methane production from RACW. The additive dose of 20 g/L was recommended for the methanogenesis of RACW at low I/S of 1:2, and the methane yield was enhanced by 12 times (505 mL/g-VS) compared with that (42 mL/g-VS) from the control. This promotion resulted from the apparently solving the over-acidogenesis problem and the adjustment of pH to the desired range. Further investigation revealed that the added GAC enhanced the activities of acetate kinase and coenzyme F420, that engaged in the acidogenic and methanogenic reactions. Meanwhile, the decrease of hydrogenase and increase of c-Cyts implied that the metabolism of direct interspecies electron transfer (DIET) was probably stimulated by GAC. Microbial investigation inferred that the enriched hydrogenotrophic methanogens and DIET-mediated syntrophic partners of Geobacter/Syntrophomonas with Methanosarcina were responsible for the enhanced methane yield.
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Affiliation(s)
- Yue Zhao
- School of Resources and Environment, University of Jinan, Jinan 250022, China
| | - Hui Mu
- School of Resources and Environment, University of Jinan, Jinan 250022, China.
| | - Yinglong Su
- Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, China
| | - Yongfang Zhang
- School of Resources and Environment, University of Jinan, Jinan 250022, China
| | - Xiaowei Qiao
- School of Resources and Environment, University of Jinan, Jinan 250022, China
| | - Chunhui Zhao
- School of Resources and Environment, University of Jinan, Jinan 250022, China.
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Zhang H, Yuan W, Dong Q, Wu D, Yang P, Peng Y, Li L, Peng X. Integrated multi-omics analyses reveal the key microbial phylotypes affecting anaerobic digestion performance under ammonia stress. WATER RESEARCH 2022; 213:118152. [PMID: 35139449 DOI: 10.1016/j.watres.2022.118152] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/16/2022] [Accepted: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Ammonia inhibition is one of the most common causes of instability during the operation of commercial biogas plants. Here, the sensitivity of different functional bacteria to ammonia stress, the ability of functional bacteria to adapt to ammonia stress, and the key phylotypes affecting anaerobic digestion (AD) performance were studied by evaluating the process performance, active microbiome, and protein expression patterns during endogenous ammonia accumulation using integrated metagenomics and metaproteomics analyses. Acetate metabolism was most sensitive to ammonia stress, and the expression activity of methyl-CoM reductase of Methanothrix was inhibited at relatively low ammonia concentrations, which resulted in the accumulation of acetate and other short-chain volatile fatty acids (VFAs) through feedback effects. As the AD process progressed, the abundance of active Methanosarcina with high ammonia tolerance increased, and the activity of their enzymes related to acetoclastic methanation was significantly up-regulated, which resulted in the complete restoration of acetate metabolism and AD performance. Thus, microbial communities can cope with acetate metabolic repression through self-optimization. In contrast, when the total ammonia nitrogen (TAN) and free ammonia nitrogen (FAN) increased to 4846.95 mg N/L and 337.46 mg N/L, respectively, propionate (and no other VFAs) accumulated in the digester, which was accompanied by a decrease in methane yield by more than 65%. At this time, the abundance of active syntrophic propionate-oxidizing bacteria (SPOB) decreased by 52%, and the expression of key enzymes related to propionate degradation was significantly down-regulated. The proportion of down-regulated differentially expressed proteins in the dominant Pelotomaculum was as high as 94%, indicating the severe suppression of the growth of these functional bacteria as well as their inability to easily acclimate to ammonia stress. Thus, SPOB appeared to be the key microbial phylotypes affecting AD performance under ammonia stress. Ammonia inhibited the methylmalonyl-CoA pathway of Pelotomaculum by inhibiting the expression of succinyl-CoA synthase, which resulted in the suppression of syntrophic propionate oxidation. The results of this study provide new insights into the microbial mechanism of ammonia inhibition and identify the key phylotypes affecting AD performance under ammonia stress. Our findings also shed light on the microbial regulatory targets of nitrogen-rich waste anaerobic digesters.
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Affiliation(s)
- Hong Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Wenduo Yuan
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Qin Dong
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Di Wu
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Pingjin Yang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Yun Peng
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
| | - Lei Li
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| | - Xuya Peng
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China
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33
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de Amarante MCA, Guerreiro PEG, Radmann EM, de Souza MDRAZ. Effect of fruits and vegetables in the anaerobic digestion of food waste from university restaurant. Appl Biochem Biotechnol 2022; 194:3365-3383. [PMID: 35357662 DOI: 10.1007/s12010-022-03895-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/14/2022] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the theoretical potential of methane production of the food waste generated by a university restaurant, as well as to verify the influence of the fruit and vegetable waste in the feeding composition of an anaerobic bioreactor treating this type of waste. Four feeding compositions combining three fractions of the food waste (fruit and vegetable fraction, soy protein and beans fraction, and rice fraction) at different concentrations were tested in anaerobic processes lasting 10 and 30 days. Additionally, a study of the theoretical potential of methane production from each fraction that composes the food waste was carried out, as well as the evaluation of the specific methanogenic activity of the anaerobic sludge. Despite its low theoretical potential of methane production (0.037 LCH4/g), the presence of the fruit and vegetable mixture in three of the feeding compositions led to greater organic matter degradation (above 69%) and CH4 yields (above 0.20 LCH4/gVS) in both periods tested, in comparison with the achieved by the feeding composition lacking this fraction. The results suggest that the presence of the fruit and vegetable mixture contributed with the supplementation of micro- and macroelements to the anaerobic sludge during the digestion of food waste.
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Affiliation(s)
- Marina Campos Assumpção de Amarante
- School of Chemistry and Food, Universidade Federal do Rio Grande (FURG), Campus Carreiros, Avenue Italia, km 08, Mail box 474, Rio Grande, RS, 96.203-900, Brazil. .,School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, West Midlands, UK.
| | - Pablo Eduardo Godinho Guerreiro
- School of Chemistry and Food, Universidade Federal do Rio Grande (FURG), Campus Carreiros, Avenue Italia, km 08, Mail box 474, Rio Grande, RS, 96.203-900, Brazil
| | - Elisangela Martha Radmann
- School of Chemistry and Food, Universidade Federal do Rio Grande (FURG), Campus Carreiros, Avenue Italia, km 08, Mail box 474, Rio Grande, RS, 96.203-900, Brazil
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Li Q, Liu Y, Gao W, Wang G, Dzakpasu M, Li YY, Chen R. New insights into the mechanisms underlying biochar-assisted sustained high-efficient co-digestion: Reducing thermodynamic constraints and enhancing extracellular electron transfer flux. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 811:151416. [PMID: 34748837 DOI: 10.1016/j.scitotenv.2021.151416] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/30/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
To clarify the roles of biochar in the anaerobic co-digestion of waste activated sludge (WAS) and food waste (FW), batch tests were conducted coupled with thermodynamics, extracellular electron transfer flux and microbial community analysis. Compared with the control group, biochar significantly facilitated the co-digestion at three periods, but its sustainable facilitation was mainly in the syntrophic methanogenesis of volatile fatty acids (VFAs). The thermodynamic analysis confirmed that biochar could alleviate limitations imposed by high hydrogen partial pressure during interspecies hydrogen transfer (IHT), the thermodynamic windows was expanded 137% and 92% in the syntrophic methanogenesis of acetate and propionate, respectively. Meanwhile, due to the redox capacity of biochar (4.85 and 0.35 μmol e-/g biochar), the equivalent current of direct interspecies electron transfer (DIET) flux for syntrophic methanogenesis of acetate and propionate obtained were 1.0 × 10-4 A and 0.9 × 10-4 A, which were 108 times than that of IHT. It should be noticed that the functional microorganisms like Methanosarcina which could participate DIET were only enriched on the surface of biochar, the dominant Methanothermobacter in suspended sludge probably indicate IHT was still the main pathway for syntrophic methanogenesis. Nevertheless, the DIET triggered by the redox-active moieties on the surface of biochar and the enhanced IHT by alleviating thermodynamic restrictions, promoted the syntrophic methanogenesis synergistically.
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Affiliation(s)
- Qian Li
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Yaqian Liu
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Wenyu Gao
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Gaojun Wang
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Mawuli Dzakpasu
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Rong Chen
- Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, No.13 Yanta Road, Xi'an 710055, PR China.
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Deng Y, Xia J, Zhao R, Xu J, Liu X. Iron-coated biochar alleviates acid accumulation and improves methane production under ammonium enrichment conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151154. [PMID: 34688755 DOI: 10.1016/j.scitotenv.2021.151154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 10/03/2021] [Accepted: 10/18/2021] [Indexed: 06/13/2023]
Abstract
The high stress of ammonia-nitrogen in swine manure anaerobic digestion (SMAD) negatively impacts methane yields. Here, the effects of iron-coated biochar in SMAD under different ammonium stresses were investigated. Iron-coated biochar prepared at 500 °C (500BC@Fe) had a large specific surface area (123.2 cm3/g) and an acceptable ammonium adsorption capacity (5.25 mg/g). In SMAD, 500BC@Fe addition effectively broke the thermodynamic barrier from butyrate to acetate and accelerated propionate degradation. It acted as a temporary electron acceptor to promote direct interspecies electron transfer in the initial SMAD stage. As the ammonium stress sharply increased from 400 mg/L to 4000 mg/L, the methanogenesis efficiency decreased from 94.3% to 94.0% and the biochemical methane potential decreased from 189.7 NmL/g VS to 176.1 NmL/g VS. A kinetic analysis showed that the predictive value of SMAD may be calculated more accurately using the Logistic function than the Modified Gompertz equation. This study provides basic theoretical data and important kinetic parameters for the intensive production of iron-coated biochar and its large-scale application in SMAD.
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Affiliation(s)
- Yuanfang Deng
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huai'an 223300, China
| | - Jun Xia
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huai'an 223300, China
| | - Rui Zhao
- School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, China
| | - Jiaxing Xu
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huai'an 223300, China
| | - Xiaoyan Liu
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huai'an 223300, China.
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Bismuth-Chitosan Nanocomposite Sensors for Trace Level Detection of Ni(II) and Co(II) in Water Samples. WATER 2022. [DOI: 10.3390/w14030302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Trace minerals play an essential role in methane production via anaerobic digestion (AD). It is important to monitor Ni(II) and Co(II) concentrations and the Ni/Co concentration ratio for the rapid diagnosis of the ecological status or activity of methanogens in AD. Electrochemical detection of Ni(II) and Co(II) was investigated by coating the Bi-chitosan nanocomposite on a glassy carbon electrode (GCE) via the electrodeposition technique. A square-wave adsorptive cathodic stripping voltammetry technique (SWAdCSV) was applied and optimized when dimethylglyoxime (DMG) was used as the chelating agent for Ni(II) and Co(II) measurements. The SWAdCSV results showed that the current peaks for Co(II) detection are 6.1 times greater than the current peaks for Ni(II) measurements, probably due to the different affinity of DMG molecules between Ni(II) and Co(II). DMG molecules demonstrated higher selectivity toward Co(II) cations compared to Ni(II). The modified Bi-chitosan GCE developed in this study showed a relatively wide range of the Ni(II) and Co(II) concentrations (2–100 µg L−1) with a limit of detection of 3.6 µg L−1 for Ni(II) and 2.4 µg L−1 for Co(II), respectively. The developed sensor was applied to Ni(II) and Co(II) spiked natural water samples and showed good performance of detection with 12 consecutive measurements. Overall, the fabricated sensor showed excellent sensitivity toward Ni(II) and Co(II) in natural water samples.
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Impact of Granular Activated Carbon on Anaerobic Process and Microbial Community Structure during Mesophilic and Thermophilic Anaerobic Digestion of Chicken Manure. SUSTAINABILITY 2022. [DOI: 10.3390/su14010447] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In this work, the impact of granular activated carbon (GAC) on the mesophilic and thermophilic anaerobic digestion of chicken manure and the structure of microbial communities was investigated. These results demonstrated that GAC supplementation effectively enhanced the consumption of produced organic acids in the mesophilic and thermophilic batch tests, accompanied by faster biomethane production in the presence of GAC than from reactors without GAC. However, since the free ammonia level was 3–6 times higher in the thermophilic reactors, this led to the instability of the anaerobic digestion process of the nitrogen-rich substrate at thermophilic temperatures. Bacteroidia and Clostridia were the two main bacterial classes in the mesophilic reactors, whereas the class Clostridia had a competitive advantage over other groups in the thermophilic systems. The archaeal communities in the mesophilic reactors were mainly represented by representatives of the genera Methanosarcina, Methanobacterium, and Methanotrix, whereas the archaeal communities in the thermophilic reactors were mainly represented by members of the genera Methanosarcina, Methanoculleus, and Methanothermobacter. New data obtained in this research will help control and manage biogas reactors in the presence of GAC at different temperatures.
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38
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Jadhav P, Bin Khalid Z, Mishra P, Bin Abd Wahid Z, Nasrullah M. Challenges and emerging approaches in life cycle assessment of engineered nanomaterials usage in anaerobic bioreactor. TECHNO-ECONOMICS AND LIFE CYCLE ASSESSMENT OF BIOREACTORS 2022:207-222. [DOI: 10.1016/b978-0-323-89848-5.00004-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Westerholm M, Calusinska M, Dolfing J. Syntrophic propionate-oxidizing bacteria in methanogenic systems. FEMS Microbiol Rev 2021; 46:6455325. [PMID: 34875063 PMCID: PMC8892533 DOI: 10.1093/femsre/fuab057] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 12/03/2021] [Indexed: 12/04/2022] Open
Abstract
The mutual nutritional cooperation underpinning syntrophic propionate degradation provides a scant amount of energy for the microorganisms involved, so propionate degradation often acts as a bottleneck in methanogenic systems. Understanding the ecology, physiology and metabolic capacities of syntrophic propionate-oxidizing bacteria (SPOB) is of interest in both engineered and natural ecosystems, as it offers prospects to guide further development of technologies for biogas production and biomass-derived chemicals, and is important in forecasting contributions by biogenic methane emissions to climate change. SPOB are distributed across different phyla. They can exhibit broad metabolic capabilities in addition to syntrophy (e.g. fermentative, sulfidogenic and acetogenic metabolism) and demonstrate variations in interplay with cooperating partners, indicating nuances in their syntrophic lifestyle. In this review, we discuss distinctions in gene repertoire and organization for the methylmalonyl-CoA pathway, hydrogenases and formate dehydrogenases, and emerging facets of (formate/hydrogen/direct) electron transfer mechanisms. We also use information from cultivations, thermodynamic calculations and omic analyses as the basis for identifying environmental conditions governing propionate oxidation in various ecosystems. Overall, this review improves basic and applied understanding of SPOB and highlights knowledge gaps, hopefully encouraging future research and engineering on propionate metabolism in biotechnological processes.
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Affiliation(s)
- Maria Westerholm
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Magdalena Calusinska
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, rue du Brill 41, B-4422 Belvaux, Luxembourg
| | - Jan Dolfing
- Faculty of Energy and Environment, Northumbria University, Newcastle-upon-Tyne, UK
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Capson-Tojo G, Astals S, Robles Á. Considering syntrophic acetate oxidation and ionic strength improves the performance of models for food waste anaerobic digestion. BIORESOURCE TECHNOLOGY 2021; 341:125802. [PMID: 34438285 DOI: 10.1016/j.biortech.2021.125802] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/12/2021] [Accepted: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Current mechanistic anaerobic digestion (AD) models cannot accurately represent the underlying processes occurring during food waste (FW) AD. This work presents an update of the Anaerobic Digestion Model no. 1 (ADM1) to provide accurate estimations of free ammonia concentrations and related inhibition thresholds, and model syntrophic acetate oxidation as acetate-consuming pathway. A modified Davies equation predicted NH3 concentrations and pH more accurately, and better estimated associated inhibitory limits. Sensitivity analysis results showed the importance of accurate disintegration kinetics and volumetric mass transfer coefficients, as well as volatile fatty acids (VFAs) and hydrogen uptake rates. In contrast to the default ADM1, the modified ADM1 could represent methane production and VFA profiles simultaneously (particularly relevant for propionate uptake). The modified ADM1 was also able to predict the predominant acetate-consuming and methane-producing microbial clades. Modelling results using data from reactors dosed with granular activated carbon showed that this additive improves hydrogen uptake.
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Affiliation(s)
- Gabriel Capson-Tojo
- Advanced Water Management Centre, The University of Queensland, Brisbane, QLD 4072, Australia; CRETUS, Department of Chemical Engineering, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain.
| | - Sergi Astals
- Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain.
| | - Ángel Robles
- Department of Chemical Engineering, Universitat de València, Avinguda de la Universitat s/n, 46100 Burjassot, València, Spain.
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41
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Kang X, Liu Y. Performance and mechanism of conductive magnetite particle-enhanced excess sludge anaerobic digestion for biogas recovery. RSC Adv 2021; 11:35559-35566. [PMID: 35493163 PMCID: PMC9043222 DOI: 10.1039/d1ra06236k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/13/2021] [Indexed: 01/01/2023] Open
Abstract
The aim of this study was to evaluate the effect of magnetite particles on the anaerobic digestion of excess sludge. The results showed that methane production increased with the increase in magnetite dosage in the range of 0–5 g L−1, and the cumulative methane production increased by 50.1% at a magnetite dosage of 5 g L−1 compared with the blank reactor after 20 days. Simultaneously, numerous volatile fatty acids (VFAs) were produced at high magnetite dosages, providing the required substrates for methanogenesis. The concentration of magnetite addition was positively correlated with methane production, which proved that magnetite was beneficial for the promotion of the conversion of VFAs to methane. Moreover, the degradation efficiencies of proteins and carbohydrates reached 64% and 52.6% at the magnetite dosage of 5 g L−1, respectively, and corresponding activities of protease and coenzyme F420 were 9.03 IU L−1 and 1.652 μmol L−1. In addition, the Methanosaeta and Methanoregula genus were enriched by magnetite, which often participate in direct interspecies electron transfer as electron acceptors. Magnetite particles were applied to excess sludge anaerobic digestion. The methane production and sludge reduction were related to magnetite particle dosage, and the Methanosaeta and Methanoregula involved in the electron transfer were enriched.![]()
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Affiliation(s)
- Xiaorong Kang
- School of Environmental Engineering, Nanjing Institute of Technology Nanjing 211167 PR China +86-18795465873
| | - Yali Liu
- School of Civil Engineering, Nanjing Forestry University Nanjing 210037 PR China
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42
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Isha A, D' Silva TC, Subbarao PMV, Chandra R, Vijay VK. Stabilization of anaerobic digestion of kitchen wastes using protein-rich additives: Study of process performance, kinetic modelling and energy balance. BIORESOURCE TECHNOLOGY 2021; 337:125331. [PMID: 34120065 DOI: 10.1016/j.biortech.2021.125331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 05/18/2021] [Accepted: 05/22/2021] [Indexed: 06/12/2023]
Abstract
Anaerobic digestion (AD) of acidic kitchen waste (KW) streams is found to be unstable and leads to poor overall efficiency. This study assessed the effect of pongamia de-oiled cake addition on KW-AD. High acidic KW (pH: 2.00-5.00), medium acidic KW (pH: 5.00-7.00) and low alkaline KW (pH: 7.00-8.00) fed into digesters I, II and III at 10% total solids (TS) achieved biogas yields of 177.82 ± 19.30, 216.57 ± 7.42 and 280.45 ± 2.55 L/kg VS. d, respectively. Maximum synergistic effect of pongamia de-oiled cake was observed in digester I with increased methane production of 46.04% and volatile solids reduction of 11.18%. The principal component analysis and kinetic evaluation revealed that pongamia de-oiled cake addition had a positive effect on the AD parameters in all digesters. With energy efficiencies exceeded 96% in all the digesters, the study proposes the addition of protein-rich additives for KW-AD stabilization.
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Affiliation(s)
- Adya Isha
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
| | - Tinku Casper D' Silva
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
| | - Paruchuri M V Subbarao
- Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
| | - Ram Chandra
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India.
| | - Virendra Kumar Vijay
- Centre for Rural Development and Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
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43
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Choe U, Mustafa AM, Zhang X, Sheng K, Zhou X, Wang K. Effects of hydrothermal pretreatment and bamboo hydrochar addition on anaerobic digestion of tofu residue for biogas production. BIORESOURCE TECHNOLOGY 2021; 336:125279. [PMID: 34038842 DOI: 10.1016/j.biortech.2021.125279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/06/2021] [Accepted: 05/09/2021] [Indexed: 06/12/2023]
Abstract
The effect of hydrothermal pretreatment (HTP) of tofu residue (TR) and co-digestion of TR with hydrochar (HC) and a liquid fraction (LF) of hydrothermal pretreatment on biogas production was studied. The highest biogas and methane yield observed with the pretreated TR at HTP temperature of 140 °C reached 288 and 207 L/Kg VS, 24 and 37% above than the raw TR (control), respectively, and the highest content of methane 72%. Adding 4 g/L of HC (produced at 200 °C) enhanced the methane and biogas yield by 18 and 19% compared to untreated TR, respectively. It was found that HTP at temperature 140 °C and additive HC-200 (4 g/L) was the most efficient for biogas production from tofu residue and significantly reduced the digestion time needed from 20 to 10-13 days to reach 95% of biogas yield, which may result in substantial economic benefits.
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Affiliation(s)
- Ungyong Choe
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Faculty of Environmental Science, University of Science, Yusheng Scientist Road, Unjong District, Pyongyang 00850, Democratic People's Republic of Korea
| | - Ahmed M Mustafa
- State Key Laboratory of Pollution Control and Resourses Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Department of Agricultural Engineering, Faculty of Agriculture, Suez Canal University, Ismailia 41522, Egypt
| | - Ximing Zhang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Kuichuan Sheng
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xuefei Zhou
- State Key Laboratory of Pollution Control and Resourses Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Kaiying Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China.
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Qin S, Wainaina S, Awasthi SK, Mahboubi A, Liu T, Liu H, Zhou Y, Liu H, Zhang Z, Taherzadeh MJ, Awasthi MK. Fungal dynamics during anaerobic digestion of sewage sludge combined with food waste at high organic loading rates in immersed membrane bioreactors. BIORESOURCE TECHNOLOGY 2021; 335:125296. [PMID: 34022478 DOI: 10.1016/j.biortech.2021.125296] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 06/12/2023]
Abstract
In this study, the influence of distinct hydraulic retention times (HRT) and organic loading rates (OLRs) on fungal dynamics during food waste anaerobic digestion in immersed membrane-based bio-reactors (iMBR) were investigated. The organic loading rate 4-8 g VS/L/d (R1) and 6-10 g VS/L/d (R2) were set in two iMBR. T1 (1d), T2 (15d) and T3 (34d) samples collected from each bioreactor were analyzed fungal community by using 18s rDNA. In R2, T2 had the most abundant Ascomycota, Basidiomycota, Chytridiomycota and Mucoromycota. As for R1, T3 also had the richest Cryptomycota except above four kinds of fungi. Subsequently, the Principal Component Analysis (PCA) and Non-Metric Multi-Dimensional Scaling (NMDS) indicated that fungal diversity was varied among the all three phases (T1, T2, and T3) and each treatment (R1 and R2). Finally, the results showed that different OLRs and HRT have significantly influenced the fungal community.
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Affiliation(s)
- Shiyi Qin
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Steven Wainaina
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Sanjeev Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Amir Mahboubi
- Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden
| | - Tao Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Huimin Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Yuwen Zhou
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Hong Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | | | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
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45
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Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace. SUSTAINABILITY 2021. [DOI: 10.3390/su13179488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Due to its high water and organic contents, management of apple pomace (AP) poses several waste management challenges on the apple juice and cider producing industries. Bioconversion of AP into biogas provides an excellent possibility to reduce the environmental challenge faced in the management of AP waste along with producing renewable energy in the form of methane. This study investigated the effect of carbon-based conductive materials (biochar and graphene) and trace metals supplementation to improve biogas production from AP. The results indicate that supplementation of biochar, trace metals, and graphene significantly improves the biogas production from AP. Trace metal and biochar supplementation at a COD concentration of 6000 mg/L resulted in 7.2% and 13.3% increases in the biogas production, respectively. When trace metals and biochar were supplemented together, the biogas production increased by 22.7%. This synergistic effect was also observed at the COD concentration of 12,000 mg/L. The improvement in the biogas formation was significantly higher for graphene supplemented reactors (27.8%). Moreover, biochar and trace metals supplementation also led to 19.6% and 23.0% increases in the methane yield relative to the reactor fed only with AP, respectively. These results suggest anaerobic digestion supplemented with carbon-based conductive materials and trace metals is a viable option for valorizing apple pomace.
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46
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Zhang Q, Li R, Guo B, Zhang L, Liu Y. Thermophilic co-digestion of blackwater and organic kitchen waste: Impacts of granular activated carbon and different mixing ratios. WASTE MANAGEMENT (NEW YORK, N.Y.) 2021; 131:453-461. [PMID: 34265699 DOI: 10.1016/j.wasman.2021.06.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/29/2021] [Accepted: 06/25/2021] [Indexed: 06/13/2023]
Abstract
Biogas (methane) as a source of renewable energy, was produced in the anaerobic co-digestion of blackwater (BW, municipal toilet wastewater) and organic kitchen waste (KW). The impact on methane production of various BW to KW mixing ratios, with and without the addition of granular activated carbon (GAC), were studied under thermophilic (55 °C) temperatures. GAC is reported to enhance methane production in such digestions through direct interspecies electron transfer. The results showed that the co-digestion of BW and KW under the 1:2 VS ratio significantly improved the biomethane potential (BMP). In the absence of GAC, an optimal BW:KW ratio was found to be 1:2, achieving a BMP of 0.76 g CH4-COD/g feed-COD. With GAC addition, the BMP increased to 0.81 g CH4-COD/g feed-COD, the lag phase in the digestion was significantly reduced, and the methane production rate increased. Microbial communities in the BW-KW anaerobic digestion were analyzed with and without the addition of GAC. Methanothermobacter and Methanosarcina were predominant archaea in BW-KW digests, with and without GAC amendment, while a third methanogen, Methanomassiliicoccus, was enriched with the addition of GAC to the digest. Further, through SEM image, the enrichment of pili-like stucture was observed in GAC surface.
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Affiliation(s)
- Qianyi Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Ran Li
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi Province, China
| | - Bing Guo
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Lei Zhang
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Yang Liu
- Department of Civil and Environmental Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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47
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Wang X, Ding S, Song W, Li H, Zhang Y, Ren W, Li M, Lu J, Ding J. A collaborative effect of algae-bacteria symbiotic and biological activated carbon system on black odorous water pretreated by UV photolysis. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.107983] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Wang Q, Li H, Feng K. Effect of honeycomb, granular, and powder activated carbon additives on continuous lactic acid fermentation of complex food waste with mixed inoculation. J Biosci Bioeng 2021; 131:655-662. [PMID: 33775543 DOI: 10.1016/j.jbiosc.2021.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/25/2021] [Accepted: 02/26/2021] [Indexed: 01/31/2023]
Abstract
To accelerate and stabilize lactic acid fermentation from food waste, three types of activated carbon, including honeycomb activated carbon, granular activated carbon, and powder activated carbon, were tested as additives in continuous food waste fermentation processes. The results showed that carbohydrate was the primary substrate for lactic acid production, but its conversion reached a high, stable level after a long period of microbial acclimation in the control system. Activated carbon, especially honeycomb activated carbon accelerated the stabilization of lactic acid fermentation and enhanced the tolerance of fermentation systems to a hostile and fluctuating environment. The addition of activated carbon increased the oxidation-reduction potential to approximately 100 mV and altered the microbial communities. Homolactic fermentation bacteria were dominant in all the systems, and the honeycomb activated carbon addition stimulated the growth of unclassified Lactobacillus and immobilized Lactobacillus panis with strong carbohydrate metabolism. In addition, powder activated carbon enhanced the degradation of protein due to the multiplying Pseudomonas. At the stable stage, the organic conversion rates were close in the control system and the systems with the activated carbon addition, and the lactic acid concentrations in these systems remained at 8000-10,000 mg/L. Considering the cost of the additives, honeycomb activated carbon is a good choice to stabilize lactic acid production from food waste.
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Affiliation(s)
- Qiao Wang
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Huan Li
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
| | - Kai Feng
- Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
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Luo J, Huang W, Zhang Q, Guo W, Xu R, Fang F, Cao J, Wu Y. A preliminary metatranscriptomic insight of eggshells conditioning on substrates metabolism during food wastes anaerobic fermentation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 761:143214. [PMID: 33160662 DOI: 10.1016/j.scitotenv.2020.143214] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Revised: 10/18/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
The anaerobic treatment of food wastes (FW) for resource recovery has been extensively studied. However, the information on the traits of functional genes and enzymes for substrates metabolisms and their associations with microbial community are little. In this study, the influences of eggshells conditioning on the substrates metabolism for volatile fatty acids production (VFAs) in the process of FW fermentation were investigated at genetic levels by using the metatranscriptomic approach. The obtained results suggested that the critical genes involved in the carbohydrate and protein metabolisms (i.e. pgmB, GPI, glsA, pyrB and etc.) were up-regulated in the eggshell-conditioned reactor, which were beneficial to the bioconversion of macromolecule organics during FW fermentation. Moreover, the functional genes related with the intermediate products metabolism (i.e. pyruvate acid, butanoate) also exhibited differential genetic expression levels, which resulted in the alteration of microbial metabolic pathways and contributed to the acetic and butyric acids accumulation. In addition, a preliminary association of microbial distribution and genetic expressions was analyzed. The distinct distribution of microbial community in different FW fermentation systems affected the corresponding microbial contribution to those genetic expression levels of metabolic enzymes involved in VFAs production. This study would provide new insights of the underlying mechanism of VFAs promotion in the eggshell-conditioned FW fermentation process from the perspectives of substrates metabolisms at genetic and functional traits.
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Affiliation(s)
- Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China; Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, East China Normal University, Shanghai 200241, China
| | - Wenxuan Huang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Qin Zhang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Wen Guo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Runze Xu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Fang Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China; College of Environment, Hohai University, Nanjing 210098, China
| | - Yang Wu
- College of Environment, Hohai University, Nanjing 210098, China; State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China.
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50
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Cai C, Li L, Hua Y, Liu H, Dai X. Ferroferric oxide promotes metabolism in Anaerolineae other than microbial syntrophy in anaerobic methanogenesis of antibiotic fermentation residue. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143601. [PMID: 33261864 DOI: 10.1016/j.scitotenv.2020.143601] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/28/2020] [Accepted: 10/31/2020] [Indexed: 06/12/2023]
Abstract
Antibiotic fermentation residue (AFR) is a kind of protein-rich biosolids that would be utilized as valuable substrates for biogas production. However, the effectiveness of conductive material supplementation and its effect on the microbiome in anaerobic digestion of AFR have not been fully elucidated. The objective of this study is to access the impact of Fe3O4 addition on anaerobic digestion of AFR and reveal its microbial mechanism. By adding Fe3O4 at concentration of 150 mg/gTS to two typical AFRs, the methane yield was decreased while the methane production rate was significantly enhanced by 48% and 21%, respectively. Genomic analyses revealed that the Fe3O4 addition altered the microbial community by selecting the unknown genus of Anaerolineae with the metabolic capacity of carbohydrate hydrolysis and proteolysis. Meanwhile, the hydrogenotrophic methanogenesis was the dominant pathway in the AFR digestion system, which was mostly contributed by the Methanoculleus and Methanolinea. More interestingly, Methanoculleus might possess fermentative capability involved in the versatile hydrolysis pathway. Although the genes related to electrically conductive pili were detected, the induction of direct interspecies electron transfer by Fe3O4 supplementation was not confirmed in this study. In summary, except the accelerated methane production rate, Fe3O4 addition functioned as biostimulator for Anaerolineae other than electron conduit in anaerobic methanogenesis in the AFR digestion system.
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Affiliation(s)
- Chen Cai
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Lei Li
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yu Hua
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Huiling Liu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiaohu Dai
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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