1
|
Zhang L, Xu W, Jiang J, Li R, Liang W. Nitrogen conversion and mechanisms related to reduced emissions by adding exogenous modified magnesium ore during aerobic composting. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 378:124550. [PMID: 40037242 DOI: 10.1016/j.jenvman.2025.124550] [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: 07/18/2024] [Revised: 01/03/2025] [Accepted: 02/11/2025] [Indexed: 03/06/2025]
Abstract
In this study, modified products with a higher specific surface area and pore volume were prepared by light burning magnesite (MS) to increase its magnesium content and surface activity. MS heated at 650 °C (MS650) was applied in aerobic composting to assess its effect on nitrogen transformation during composting and the possible related chemical and microbial mechanisms. Adding MS650 reduced the NH3 emissions (0.74-52.4%), N2O emissions (29.0-57.9%), and greenhouse gas emissions (41.8-60.3%), and its effect on reducing nitrogen emissions was negatively correlated with the amount added, where the optimum proportion of MS650 was 2.5%. Struvite precipitation and physical adsorption were the chemical mechanisms responsible for nitrogen retention. MS650 inhibited the growth of nitrifying, nitrate reducing, and denitrifying bacteria. The total organic carbon content, electrical conductivity, and N2O together explained most of the variation (52.7%) in nitrogen functional genes, followed by Proteobacteria (28.6%). These findings have important implications for reducing nitrogen and greenhouse gas emissions, and improving the quality of compost products.
Collapse
Affiliation(s)
- Li Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Wanying Xu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jiangxiang Jiang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Wen Liang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
2
|
Huang S, Cheng J, Hu H, Rasool A, Manzoor R, Mao D. Bioconversion of Alpha-Cembratriene-4,6-diol into High-Value Compound Farnesal Through Employment of a Novel Stenotrophomonas maltophilia H3-1 Strain. Molecules 2025; 30:1090. [PMID: 40076316 PMCID: PMC11901948 DOI: 10.3390/molecules30051090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2024] [Revised: 02/22/2025] [Accepted: 02/24/2025] [Indexed: 03/14/2025] Open
Abstract
Alpha-cembratriene-4,6-diol (α-CBT-diol) is a complex diterpenoid primarily found in Solanaceae (i.e., tobacco leaves), Pinaceae, and marine corals. Due to its intricate chemical structure, it serves as a precursor for several aroma compounds, including farnesal. Farnesal and its derivatives have applications across various fields, such as the fragrance and flavor industry, pharmaceuticals, agriculture, and cosmetics. In this study, Stenotrophomonas maltophilia H3-1, a strain capable of efficiently biodegrading α-CBT-diol into farnesal, was isolated from soil and identified through 16S rDNA sequence analysis. S. maltophilia H3-1 biodegraded 93.3% of α-CBT-diol (300 mg/L) within 36 h when grown under optimized culture conditions, including a temperature of 40 °C, pH of 8, 2 g/L maltose, and 2 g/L ammonium sulfate. Theoretically, this strain can produce 201 mg/L of farnesal during the biotransformation of α-CBT-diol. The putative α-CBT-diol bioconversion pathway expressed in S. maltophilia H3-1 is also proposed. This is the first study to report the bioconversion of α-CBT-diol into the high-value compound farnesal using a novel S. maltophilia H3-1 strain. It highlights that other compounds found in tobacco can also be bioconverted into valuable products.
Collapse
Affiliation(s)
- Shen Huang
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; (S.H.); (J.C.); (H.H.)
| | - Jiaming Cheng
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; (S.H.); (J.C.); (H.H.)
| | - Huibo Hu
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; (S.H.); (J.C.); (H.H.)
| | - Aamir Rasool
- Institute of Biochemistry, University of Balochistan, Quetta 87300, Pakistan;
| | - Robina Manzoor
- Department of Biotechnology and Bioinformatics, Lasbela University of Agriculture, Water and Marine Sciences, Uthal 90150, Pakistan;
| | - Duobin Mao
- College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China; (S.H.); (J.C.); (H.H.)
| |
Collapse
|
3
|
Guanglei L, Tabassum S, Li J, Altundag H. Efficient manganese ammonia oxidation (Mnammox) and its influencing factors at low temperature: Metal oxide-mediated denitrification process in water bodies. BIORESOURCE TECHNOLOGY 2024; 414:131617. [PMID: 39393647 DOI: 10.1016/j.biortech.2024.131617] [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: 06/03/2024] [Revised: 10/08/2024] [Accepted: 10/08/2024] [Indexed: 10/13/2024]
Abstract
This study explores the metal oxide-mediated NH4+-N reduction process: manganese ammonia oxidation efficiency, influencing factors and its resistance to low-temperature environments in water bodies. After 177d of stabilized startup of an up-flow reactor, NH4+-N removal efficiency was 63.51 %, total nitrogen (TN) removal rate was 0.021 kg/(m3.d), and effluent Mn2+ concentration was 1.503 mg/L, which was in dynamic equilibrium. X-ray photoelectron spectroscopy exhibited manganese valence state 3.29, similar to biological manganese oxidation. High-throughput sequencing revealed that phyla's denitrification function increased relative abundance, and manganese-reducing bacterial genera appeared. The batch test showed that 5 mg MnO2 had NH4+-N removal at 85.01 %. After 44 days, NH4+-N removal efficiency was 77.47 %, effluent Mn2+ concentration was 3.280 mg/L, TN removal rate was 0.063 kg/(m3.d). The long-term effect of the influent load change on the denitrification and Mnammox efficiency at 25 ∼ 15 °C was examined. Effluent Mn2+ concentration was 1.811 mg/L was relatively stable. Manganese valence decreased from 3.29 to 3.20, Mn4+ decreased by 9.58 %, while Mn3+ and Mn2+ increased by 10.94 % and 1.37 %, respectively. A new phylum Thermotogota and genus SBR1031 appeared in the microbial community.
Collapse
Affiliation(s)
- Li Guanglei
- School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China
| | - Salma Tabassum
- Department of Chemistry, Faculty of Science, Sakarya University, Sakarya 54187, Turkey; Biomedical, Magnetic and Semiconductor Materials Research Center (BIMAS-RC), Sakarya University, Sakarya 54187, Turkey.
| | - Jun Li
- School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China.
| | - Huseyin Altundag
- Department of Chemistry, Faculty of Science, Sakarya University, Sakarya 54187, Turkey; Biomedical, Magnetic and Semiconductor Materials Research Center (BIMAS-RC), Sakarya University, Sakarya 54187, Turkey
| |
Collapse
|
4
|
Wang L, Ren Z, Xu Z, Liu L, Chang R, Li Y. Promoting effect of ammonia oxidation on sulfur oxidation during composting: Nitrate as a bridge. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 191:13-22. [PMID: 39504837 DOI: 10.1016/j.wasman.2024.10.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2024] [Revised: 09/25/2024] [Accepted: 10/27/2024] [Indexed: 11/08/2024]
Abstract
Ammonia (NH3) and hydrogen sulfide (H2S) are the main odor components in the composting process. Controlling their emissions is very important to reduce environmental pollution and improve the quality of composting products. This study explored the effects of functional bacteria on nitrogen and sulfur metabolism in the composting process of food waste (FW) by adding ammonia-oxidizing bacteria (AOB, A treatment), sulfur-oxidizing bacteria (SOB, S treatment), and combined AOB and SOB (AS treatment), respectively. The key bacterial species involved in nitrogen and sulfur transformation were identified, and the intrinsic mechanisms by which ammonia oxidation drove sulfur oxidation during composting were deciphered. Compared with control treatment (CK), the combined addition of functional microorganisms increased the maximum of soxB gene abundance by 1.72 times, thus resulting in the increase in the SO42- content by 44.00 %. AS treatment decreased the cumulative H2S emission and total sulfur (TS) loss by 40.24 % and 34.69 %, respectively, meanwhile lowering NH3 emission. Correlation network analysis showed that the simultaneous addition of AOB and SOB enhanced the correlation between microorganisms and sulfur oxidation genes, and Acinetobacter, Aeribacillus, Brevibacterium and Ureibacillus might be involved in the ammonia oxidation-promoted sulfur oxidation process. In summary, the optimized inoculation strategy of AOB and SOB could drive biological transformation of nitrogen and sulfur by regulating microbial community, ultimately reducing odor emissions and improving sulfur conservation.
Collapse
Affiliation(s)
- Lingxiao Wang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Zhiping Ren
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Zhao Xu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Lixin Liu
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Ruixue Chang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Yanming Li
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China.
| |
Collapse
|
5
|
Yang X, Yin ML, Huan ZL, Zhu YB, Zhao SP, Xi HL. Microecological characteristics of water bodies/sediments and microbial remediation strategies after 50 years of pollution exposure in ammunition destruction sites in China. ENVIRONMENTAL RESEARCH 2024; 251:118640. [PMID: 38479720 DOI: 10.1016/j.envres.2024.118640] [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: 01/07/2024] [Revised: 02/26/2024] [Accepted: 03/05/2024] [Indexed: 03/17/2024]
Abstract
The effects of long-term ammunition pollution on microecological characteristics were analyzed to formulate microbial remediation strategies. Specifically, the response of enzyme systems, N/O stable isotopes, ion networks, and microbial community structure/function levels were analyzed in long-term (50 years) ammunition-contaminated water/sediments from a contamination site, and a compound bacterial agent capable of efficiently degrading trinitrotoluene (TNT) while tolerating many heavy metals was selected to remediate the ammunition-contaminated soil. The basic physical and chemical properties of the water/sediment (pH (up: 0.57-0.64), nitrate (up: 1.31-4.28 times), nitrite (up: 1.51-5.03 times), and ammonium (up: 7.06-70.93 times)) were changed significantly, and the significant differences in stable isotope ratios of N and O (nitrate nitrogen) confirmed the degradability of TNT by indigenous microorganisms exposed to long-term pollution. Heavy metals, such as Pb, Zn, Cu, Cd, Cs, and Sb, have synergistic toxic effects in ammunition-contaminated sites, and significantly decreased the microbial diversity and richness in the core pollution area. However, long-term exposure in the edge pollution area induced microorganisms to use TNT as a carbon and nitrogen sources for life activities and growth and development. The Bacteroidales microbial group was significantly inhibited by ammunition contamination, whereas microorganisms such as Proteobacteria, Acidobacteriota, and Comamonadaceae gradually adapted to this environmental stress by regulating their development and stress responses. Ammunition pollution significantly affected DNA replication and gene regulation in the microecological genetic networks and increased the risk to human health. Mg and K were significantly involved in the internal mechanism of microbial transport, enrichment, and metabolism of TNT. Nine strains of TNT-utilizing microbes were screened for efficient TNT degradation and tolerance to typical heavy metals (copper, zinc and lead) found in contaminated sites, and a compound bacterial agent prepared for effective repair of ammunition-contaminated soil significantly improved the soil ecological environment.
Collapse
Affiliation(s)
- Xu Yang
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Mao-Ling Yin
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Zheng-Lai Huan
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Yong-Bing Zhu
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - San-Ping Zhao
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Hai-Ling Xi
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China.
| |
Collapse
|
6
|
Tran HT, Binh QA, Van Tung T, Pham DT, Hoang HG, Hai Nguyen NS, Xie S, Zhang T, Mukherjee S, Bolan NS. A critical review on characterization, human health risk assessment and mitigation of malodorous gaseous emission during the composting process. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 351:124115. [PMID: 38718963 DOI: 10.1016/j.envpol.2024.124115] [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: 01/26/2024] [Revised: 04/30/2024] [Accepted: 05/03/2024] [Indexed: 05/12/2024]
Abstract
Composting has emerged as a suitable method to convert or transform organic waste including manure, green waste, and food waste into valuable products with several advantages, such as high efficiency, cost feasibility, and being environmentally friendly. However, volatile organic compounds (VOCs), mainly malodorous gases, are the major concern and challenges to overcome in facilitating composting. Ammonia (NH3) and volatile sulfur compounds (VSCs), including hydrogen sulfide (H2S), and methyl mercaptan (CH4S), primarily contributed to the malodorous gases emission during the entire composting process due to their low olfactory threshold. These compounds are mainly emitted at the thermophilic phase, accounting for over 70% of total gas emissions during the whole process, whereas methane (CH4) and nitrous oxide (N2O) are commonly detected during the mesophilic and cooling phases. Therefore, the human health risk assessment of malodorous gases using various indexes such as ECi (maximum exposure concentration for an individual volatile compound EC), HR (non-carcinogenic risk), and CR (carcinogenic risk) has been evaluated and discussed. Also, several strategies such as maintaining optimal operating conditions, and adding bulking agents and additives (e.g., biochar and zeolite) to reduce malodorous emissions have been pointed out and highlighted. Biochar has specific adsorption properties such as high surface area and high porosity and contains various functional groups that can adsorb up to 60%-70% of malodorous gases emitted from composting. Notably, biofiltration emerged as a resilient and cost-effective technique, achieving up to 90% reduction in malodorous gases at the end-of-pipe. This study offers a comprehensive insight into the characterization of malodorous emissions during composting. Additionally, it emphasizes the need to address these issues on a larger scale and provides a promising outlook for future research.
Collapse
Affiliation(s)
- Huu-Tuan Tran
- Laboratory of Ecology and Environmental Management, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam.
| | - Quach An Binh
- Advanced Applied Sciences Research Group, Dong Nai Technology University, Bien Hoa City, Viet Nam; Faculty of Technology, Dong Nai Technology University, Bien Hoa City, Viet Nam
| | - Tra Van Tung
- Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam
| | - Duy Toan Pham
- Department of Health Sciences, College of Natural Sciences, Can Tho University, Can Tho 900000, Viet Nam
| | - Hong-Giang Hoang
- Faculty of Technology, Dong Nai Technology University, Bien Hoa City, Viet Nam
| | - Ngoc Son Hai Nguyen
- Faculty of Environment, Thai Nguyen University of Agriculture and Forestry (TUAF), Thai Nguyen, 23000, Viet Nam
| | - Shiyu Xie
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences (CAAS), Beijing, China
| | - Tao Zhang
- Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, Key Laboratory of Plant-Soil Interactions of Ministry of Education, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Santanu Mukherjee
- School of Biological & Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan 173229, India
| | - Nanthi S Bolan
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia; School of Agriculture and Environment, The University of Western Australia, Perth, WA 6001, Australia
| |
Collapse
|
7
|
Liu Z, Cao S, He X, Liu G, Yao H, Ding S, Fang J. Effects of crayfish shell powder and bamboo-derived biochar on nitrogen conversion, bacterial community and nitrogen functional genes during pig manure composting. BIORESOURCE TECHNOLOGY 2024; 402:130783. [PMID: 38701980 DOI: 10.1016/j.biortech.2024.130783] [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: 03/06/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/06/2024]
Abstract
This study investigated the effects of crayfish shell powder (CSP) and bamboo-derived biochar (BDB) on nitrogen metabolism, bacterial community and nitrogen functional genes during pig manure composting. Four treatments were established: CP (with no additives), TP1 (5 % BDB), TP2 (5 % CSP) and TP3 (2.5 % BDB + 2.5 % CSP). Compared to CP, the germination index (GI) of TP reached > 85 % 10 days earlier. Meanwhile, TP3 reduced NH3 and N2O emissions by 42.90 % and 65.9 %, respectively, while increased TN (total nitrogen) concentration by 5.43 g/kg. Furthermore, additives changed the bacterial structure and formed a beneficial symbiotic relationship with essential N-preserving bacteria, thereby enhancing nitrogen retention throughout the composting process. Metagenomic analysis revealed that additives upregulated nitrification genes and downregulated denitrification and nitrate reduction genes, ultimately improving nitrogen cycling and mitigating NH3 and N2O emissions. In conclusion, the results confirmed that TP3 was the most effective treatment in reducing nitrogen loss.
Collapse
Affiliation(s)
- Zhuangzhuang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha 410128, PR China
| | - Shuhua Cao
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha 410128, PR China
| | - Xi He
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, Hunan 410128, PR China
| | - Gang Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha 410128, PR China
| | - Hao Yao
- Changsha IMADEK Intelligent Technology Co., LTD, PR China
| | - Sujuan Ding
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha 410128, PR China
| | - Jun Fang
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, Hunan 410128, PR China; Hunan Engineering Laboratory for Pollution Control and Waste Utilization in Swine Production, Changsha 410128, PR China.
| |
Collapse
|
8
|
Zhou Z, Shi X, Bhople P, Jiang J, Chater CCC, Yang S, Perez-Moreno J, Yu F, Liu D. Enhancing C and N turnover, functional bacteria abundance, and the efficiency of biowaste conversion using Streptomyces-Bacillus inoculation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 358:120895. [PMID: 38626487 DOI: 10.1016/j.jenvman.2024.120895] [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: 11/10/2023] [Revised: 03/01/2024] [Accepted: 04/10/2024] [Indexed: 04/18/2024]
Abstract
Microbial inoculation plays a significant role in promoting the efficiency of biowaste conversion. This study investigates the function of Streptomyces-Bacillus Inoculants (SBI) on carbon (C) and nitrogen (N) conversion, and microbial dynamics, during cow manure (10% and 20% addition) and corn straw co-composting. Compared to inoculant-free controls, inoculant application accelerated the compost's thermophilic stage (8 vs 15 days), and significantly increased compost total N contents (+47%) and N-reductase activities (nitrate reductase: +60%; nitrite reductase: +219%). Both bacterial and fungal community succession were significantly affected by DOC, urease, and NH4+-N, while the fungal community was also significantly affected by cellulase. The contribution rate of Cupriavidus to the physicochemical factors of compost was as high as 83.40%, but by contrast there were no significantly different contributions (∼60%) among the top 20 fungal genera. Application of SBI induced significant correlations between bacteria, compost C/N ratio, and catalase enzymes, indicative of compost maturation. We recommend SBI as a promising bio-composting additive to accelerate C and N turnover and high-quality biowaste maturation. SBI boosts organic cycling by transforming biowastes into bio-fertilizers efficiently. This highlights the potential for SBI application to improve plant growth and soil quality in multiple contexts.
Collapse
Affiliation(s)
- Ziyan Zhou
- The Germplasm Bank of Wild Species & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Xiaofei Shi
- The Germplasm Bank of Wild Species & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Parag Bhople
- Crops, Environment, And Land Use Department, Environment Research Centre, Teagasc, Johnstown Castle, Wexford, Y35TC98, Ireland
| | - Jishao Jiang
- School of Environment, Henan Normal University, Xinxiang, Henan, 453007, China
| | - Caspar C C Chater
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK; Plants, Photosynthesis, and Soil, School of Biosciences, University of Sheffield, Sheffield, S10 2TN, UK
| | - Shimei Yang
- The Germplasm Bank of Wild Species & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China
| | - Jesus Perez-Moreno
- Colegio de Postgraduados, Campus Montecillo, Edafologia, Texcoco, 56230, Mexico
| | - Fuqiang Yu
- The Germplasm Bank of Wild Species & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
| | - Dong Liu
- The Germplasm Bank of Wild Species & Yunnan Key Laboratory for Fungal Diversity and Green Development, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, Yunnan, China.
| |
Collapse
|
9
|
Wei L, Li J, Wang Z, Wu J, Wang S, Cai Z, Lu Y, Su C. Evaluating effects of tetrabromobisphenol A and microplastics on anaerobic granular sludge: Physicochemical properties, microbial metabolism, and underlying mechanisms. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 359:121077. [PMID: 38718604 DOI: 10.1016/j.jenvman.2024.121077] [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: 02/07/2024] [Revised: 04/07/2024] [Accepted: 04/30/2024] [Indexed: 05/22/2024]
Abstract
Tetrabromobisphenol A (TBBPA) and microplastics are emerging contaminants of widespread concern. However, little is known about the effects of combined exposure to TBBPA and microplastics on the physicochemical properties and microbial metabolism of anaerobic granular sludge. This study investigated the effects of TBBPA, polystyrene microplastics (PS MP) and polybutylene succinate microplastics (PBS MP) on the physicochemical properties, microbial communities and microbial metabolic levels of anaerobic granular sludge. The results showed that chemical oxygen demand (COD) removal of sludge was lowest in the presence of TBBPA alone and PS MP alone with 33.21% and 30.06%, respectively. The microorganisms promoted the secretion of humic substances under the influence of TBBPA, PS MP and PBS MP. The lowest proportion of genes controlling glycolytic metabolism in sludge was 1.52% when both TBBPA and PS MP were added. Microbial reactive oxygen species were increased in anaerobic granular sludge exposed to MPS. In addition, TBBPA treatment decreased electron transfer of the anaerobic granular sludge and disrupted the pathway of anaerobic microorganisms in acquiring adenosine triphosphate, and MPs attenuated the negative effects of TBBPA on the acetate methanogenesis process of the anaerobic granular sludge. This study provides a reference for evaluating the impact of multiple pollutants on anaerobic granular sludge.
Collapse
Affiliation(s)
- Lixin Wei
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Junjian Li
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Zi Wang
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Jinyan Wu
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Shuying Wang
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Zhexiang Cai
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China
| | - Yuxiang Lu
- Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, 15 Yucai Road, Guilin, 541004, PR China
| | - Chengyuan Su
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions, Guangxi Normal University, 15 Yucai Road, Guilin, 541004, PR China; Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, 15 Yucai Road, Guilin, 541004, PR China.
| |
Collapse
|
10
|
Zhuo Cai J, Lan Yu Y, Biao Yang Z, Xun Xu X, Chun Lv G, Lian Xu C, Yin Wang G, Qi X, Li T, Bon Man Y, Hung Wong M, Cheng Z. Synergistic improvement of humus formation in compost residue by fenton-like and effective microorganism composite agents. BIORESOURCE TECHNOLOGY 2024; 400:130703. [PMID: 38631654 DOI: 10.1016/j.biortech.2024.130703] [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: 01/12/2024] [Revised: 04/13/2024] [Accepted: 04/14/2024] [Indexed: 04/19/2024]
Abstract
Improving the humification of compost through a synergistic approach of biotic and abiotic methods is of great significance. This study employed a composite reagent, comprising Fenton-like agents and effective microorganisms (EM) to improve humification. This composite reagent increased humic-acid production by 37.44 %, reaching 39.82 g kg-1, surpassing the control group. The composite reagent synergistically promoted micromolecular fulvic acid and large humic acid production. Collaborative mechanism suggests that Fenton-like agents contributed to bulk residue decomposition and stimulated the evolution of microbial communities, whereas EMs promoted highly aromatic substance synthesis and adjusted the microbial community structure. Sequencing analysis indicates the Fenton-like agent initiated compost decomposition by Firmicutes, and EM reduced the abundance of Virgibacillus, Lentibacillus, and Alcanivorax. Applied as an organic fertilizer in Brassica chinensis L. plantations, the composite reagent considerably improved growth and photosynthetic pigment content. This composite reagent with biotic and abiotic components provides a learnable method for promoting humification.
Collapse
Affiliation(s)
- Jun Zhuo Cai
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Ying Lan Yu
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Zhan Biao Yang
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Xiao Xun Xu
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Guo Chun Lv
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Chang Lian Xu
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Gui Yin Wang
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Xin Qi
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Ting Li
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China
| | - Yu Bon Man
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Ming Hung Wong
- Consortium on Health, Environment, Education, and Research (CHEER), and Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, Hong Kong, China
| | - Zhang Cheng
- School of Environmental Sciences, Sichuan Agricultural University, Chengdu, China.
| |
Collapse
|
11
|
Sun R, Li Q. Exogenous additive ferric sulfate regulates sulfur-oxidizing bacteria in cow manure composting to promote carbon fixation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:32212-32224. [PMID: 38649605 DOI: 10.1007/s11356-024-33417-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024]
Abstract
Enhancing carbon fixation in the composting process was of great significance in the era of massive generation of organic solid waste. In this study, the experimental results showed that the contents of dissolved organic matter (DOM) in the experimental group (CT) were 37.58% higher than those in the control group (CK). The CO2 emission peaked on day 5, and the value of CK was 1.34 times that of CT. Significant differences were observed between the contents of sulfur fractions in CT and CK. This phenomenon may be due to the suppression of sulfur-reducing gene expression in CT. On day 51 of composting, the abundance of sulfur-oxidizing bacteria (SOB) Rhodobacter (5.33%), Rhodovulum (14.76%), and Thioclava (23.83%) in CT was higher than that in CK. In summary, the composting fermentation regulated by Fe2(SO4)3 increased the sulfate content, enhanced the expression of sulfur-oxidizing genes and SOB, and ultimately promoted carbon sequestration during composting.
Collapse
Affiliation(s)
- Ru Sun
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China.
| |
Collapse
|
12
|
Liang X, Wen X, Yang H, Lu H, Wang A, Liu S, Li Q. Incorporating microbial inoculants to reduce nitrogen loss during sludge composting by suppressing denitrification and promoting ammonia assimilation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 915:170000. [PMID: 38242453 DOI: 10.1016/j.scitotenv.2024.170000] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 12/29/2023] [Accepted: 01/06/2024] [Indexed: 01/21/2024]
Abstract
To address the challenge of increasing nitrogen retention in compost, this study investigated the effects of microbial communities on denitrification and ammonia assimilation during sludge composting by inoculating microbial inoculants. The results showed that the retention rates of total Kjeldahl nitrogen (TKN) and humic acid (HA) in MIs group (with microbial inoculants) were 4.94 % and 18.52 % higher than those in the control group (CK), respectively. Metagenomic analysis showed that Actinobacteria and Proteobacteria were identified as main microorganisms contributing to denitrification and ammonia assimilation. The addition of microbial agents altered the structure of the microbial community, which in turn stimulated the expression of functional genes. During cooling period, the ammonia assimilation genes glnA, gltB and gltD in MIs were 15.98 %, 24.84 % and 32.88 % higher than those in CK, respectively. Canonical correspondence analysis revealed a positive correlation between the dominant bacterial genera from the cooling stage to the maturity stage and the levels of NO3--N, NH4+-N, HA, and TKN contents. NH4+-N was positively correlated with HA, indicating NH4+-N might be incorporated into HA. Heat map and network analyses revealed NH4+-N as a key factor affecting functional genes of denitrification and ammonia assimilation, with Nitrospira identified as the core bacteria in the microbial network. Therefore, the addition of microbial agents could increase nitrogen retention and improve compost product quality.
Collapse
Affiliation(s)
- Xueling Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xiaoli Wen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Hongmei Yang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Heng Lu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Ao Wang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Shuaipeng Liu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Qunliang Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
| |
Collapse
|
13
|
Dong Y, Gao M, Cai Q, Qiu W, Xiao L, Chen Z, Peng H, Liu Q, Song Z. The impact of microplastics on sulfur REDOX processes in different soil types: A mechanism study. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133432. [PMID: 38219596 DOI: 10.1016/j.jhazmat.2024.133432] [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: 09/28/2023] [Revised: 12/29/2023] [Accepted: 01/02/2024] [Indexed: 01/16/2024]
Abstract
Microplastics can potentially affect the physical and chemical properties of soil, as well as soil microbial communities. This could, in turn, influence soil sulfur REDOX processes and the ability of soil to supply sulfur effectively. However, the specific mechanisms driving these effects remain unclear. To explore this, soil microcosm experiments were conducted to assess the impacts of polystyrene (PS) and polyphenylene sulfide (PPS) microplastics on sulfur reduction-oxidation (REDOX) processes in black, meadow, and paddy soils. The findings revealed that PS and PPS most significantly decreased SO42- in black soil by 9.4%, elevated SO42- in meadow soil by 20.8%, and increased S2- in paddy soil by 20.5%. PS and PPS microplastics impacted the oxidation process of sulfur in soil by influencing the activity of sulfur dioxygenase, which was mediated by α-proteobacteria and γ-proteobacteria, and the oxidation process was negatively influenced by soil organic matter. PS and PPS microplastics impacted the reduction process of sulfur in soil by influencing the activity of adenosine-5'-phosphosulfate reductase, sulfite reductase, which was mediated by Desulfuromonadales and Desulfarculales, and the reduction process was positively influenced by soil organic matter. In addition to their impacts on microorganisms, it was found that PP and PPS microplastics directly influenced the structure of soil enzymes, leading to alterations in soil enzyme activity. This study sheds light on the mechanisms by which microplastics impact soil sulfur REDOX processes, providing valuable insights into how microplastics influence soil health and functioning, which is essential for optimizing crop growth and maximizing yield in future agricultural practices.
Collapse
Affiliation(s)
- Youming Dong
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Minling Gao
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Qiqi Cai
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Weiwen Qiu
- The New Zealand Institute for Plant and Food Research Limited, Private Bag 3230, Hamilton 3240, New Zealand
| | - Ling Xiao
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Zimin Chen
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Hongchang Peng
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China
| | - Qinghai Liu
- Institute of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, Tibet 850032, China
| | - Zhengguo Song
- Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China.
| |
Collapse
|
14
|
Zhao H, Li S, Pu J, Wang H, Dou X. Effects of Bacillus-based inoculum on odor emissions co-regulation, nutrient element transformations and microbial community tropological structures during chicken manure and sawdust composting. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 354:120328. [PMID: 38354615 DOI: 10.1016/j.jenvman.2024.120328] [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: 11/09/2023] [Revised: 01/16/2024] [Accepted: 02/08/2024] [Indexed: 02/16/2024]
Abstract
This study aims to evaluate whether different doses of Bacillus-based inoculum inoculated in chicken manure and sawdust composting will provide distinct effects on the co-regulation of ammonia (NH3) and hydrogen sulfide (H2S), nutrient conversions and microbial topological structures. Results indicate that the Bacillus-based inoculum inhibits NH3 emissions mainly by regulating bacterial communities, while promotes H2S emissions by regulating both bacterial and fungal communities. The inoculum only has a little effect on total organic carbon (TOC) and inhibits total sulfur (TS) and total phosphorus (TP) accumulations. Low dose inoculation inhibits total potassium (TK) accumulation, while high dose inoculation promotes TK accumulation and the opposite is true for total nitrogen (TN). The inoculation slightly affects the bacterial compositions, significantly alters the fungal compositions and increases the microbial cooperation, thus influencing the compost substances transformations. The microbial communities promote ammonium nitrogen (NH4+-N), TN, available phosphorus (AP), total potassium (TK) and TS, but inhibit nitrate nitrogen (NO3--N), TP and TK. Additionally, the bacterial communities promote, while the fungal communities inhibit the nitrite nitrogen (NO2--N) production. The core bacterial and fungal genera regulate NH3 and H2S emissions through the secretions of metabolic enzymes and the promoting or inhibiting effects on NH3 and H2S emissions are always opposite. Hence, Bacillus-based inoculum cannot regulate the NH3 and H2S emissions simultaneously.
Collapse
Affiliation(s)
- Huaxuan Zhao
- Jiangsu Institute of Poultry Sciences, Yangzhou, 225125, China
| | - Shangmin Li
- Jiangsu Institute of Poultry Sciences, Yangzhou, 225125, China.
| | - Junhua Pu
- Jiangsu Institute of Poultry Sciences, Yangzhou, 225125, China
| | - Hongzhi Wang
- Jiangsu Institute of Poultry Sciences, Yangzhou, 225125, China
| | - Xinhong Dou
- Jiangsu Institute of Poultry Sciences, Yangzhou, 225125, China
| |
Collapse
|
15
|
Zhu L, Li W, Huang C, Tian Y, Xi B, Wu W, Yan Y. Contribution of sulfur-containing precursors to release of hydrogen sulfide in sludge composting. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 353:120195. [PMID: 38306858 DOI: 10.1016/j.jenvman.2024.120195] [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: 09/05/2023] [Revised: 01/03/2024] [Accepted: 01/20/2024] [Indexed: 02/04/2024]
Abstract
Hydrogen sulfide (H2S) production during composting can impact the environment and human health. Especially during the thermophilic phase, H2S is discharged in large quantities. However, in sludge composting, the contributions of different sulfur-containing precursors to H2S fluxes, key functional microorganisms, and key environmental parameters for reducing H2S flux remain unclear. Analysis of cysteine (Cys), methionine (Met), and sulfate (SO42-) concentrations, multiple stepwise regression analysis, and Kyoto Encyclopedia of Genes and Genomes (KEGG) annotation analysis of metagenomes showed that Cys was the main contributor to the production of H2S and that Met was among the main sources during the first three days of composting, while the SO42- contribution to H2S was negligible. Fifteen functional genera involved in the conversion of precursors to H2S were identified by co-occurrence network analysis. Only Bacillus showed high temperature resistance (>50 °C) and the ability to reduce H2S. Redundancy analysis showed that total carbon (64.0 %) and pH (23.3 %) had significant effects on functional bacteria. H2S had a quadratic relationship with sulfur-containing precursors. All microbial network sulfur-containing precursors metabolism modules showed a highly significant relationship with Cys.
Collapse
Affiliation(s)
- Lin Zhu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Wei Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Caihong Huang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Yu Tian
- State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Weixia Wu
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| | - Yimeng Yan
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Ecological Effect and Risk Assessment of Chemicals, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541006, China
| |
Collapse
|
16
|
Awasthi MK, Ganeshan P, Gohil N, Kumar V, Singh V, Rajendran K, Harirchi S, Solanki MK, Sindhu R, Binod P, Zhang Z, Taherzadeh MJ. Advanced approaches for resource recovery from wastewater and activated sludge: A review. BIORESOURCE TECHNOLOGY 2023; 384:129250. [PMID: 37286046 DOI: 10.1016/j.biortech.2023.129250] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 05/24/2023] [Accepted: 05/26/2023] [Indexed: 06/09/2023]
Abstract
Due to resource scarcity, current industrial systems are switching from waste treatment, such as wastewater treatment and biomass, to resource recovery (RR). Biofuels, manure, pesticides, organic acids, and other bioproducts with a great market value can be produced from wastewater and activated sludge (AS). This will not only help in the transition from a linear economy to a circular economy, but also contribute to sustainable development. However, the cost of recovering resources from wastewater and AS to produce value-added products is quite high as compared to conventional treatment methods. In addition, most antioxidant technologies remain at the laboratory scale that have not yet reached the level at industrial scale. In order to promote the innovation of resource recovery technology, the various methods of treating wastewater and AS to produce biofuels, nutrients and energy are reviewed, including biochemistry, thermochemistry and chemical stabilization. The limitations of wastewater and AS treatment methods are prospected from biochemical characteristics, economic and environmental factors. The biofuels derived from third generation feedstocks, such as wastewater are more sustainable. Microalgal biomass are being used to produce biodiesel, bioethanol, biohydrogen, biogas, biooils, bioplastics, biofertilizers, biochar and biopesticides. New technologies and policies can promote a circular economy based on biological materials.
Collapse
Affiliation(s)
- Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
| | - Prabakaran Ganeshan
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Andhra Pradesh, India
| | - Nisarg Gohil
- Department of Biosciences, School of Science, Indrashil University, Rajpur, Mehsana 382715, Gujarat, India
| | - Vinay Kumar
- Ecotoxicity and Bioconversion Laboratory, Department of Community Medicine, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai 602105, India
| | - Vijai Singh
- Department of Biosciences, School of Science, Indrashil University, Rajpur, Mehsana 382715, Gujarat, India
| | - Karthik Rajendran
- Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Andhra Pradesh, India
| | - Sharareh Harirchi
- Swedish Centre for Resource Recovery, University of Borås, Borås 50190, Sweden
| | - Manoj Kumar Solanki
- Plant Cytogenetics and Molecular Biology Group, Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia in Katowice, Poland
| | - Raveendran Sindhu
- Department of Food Technology, TKM Institute of Technology, Kollam 691 505, Kerala, India
| | - Parameswaran Binod
- Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India
| | - Zengqiang Zhang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China
| | | |
Collapse
|
17
|
Li H, Li X, Zhang D, Xu Y. Addition of exogenous microbial agents increases hydrogen sulfide emissions during aerobic composting of kitchen waste by improving bio-synergistic effects. BIORESOURCE TECHNOLOGY 2023:129334. [PMID: 37328014 DOI: 10.1016/j.biortech.2023.129334] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/10/2023] [Accepted: 06/13/2023] [Indexed: 06/18/2023]
Abstract
The effect of microbial agents (MA) on hydrogen sulfide (H2S) emissions in the compost is still a controversial issue. This study examined the effects and microbial mechanisms of MA on H2S emissions during the composting of kitchen waste. The results showed that MA addition can promote sulfur conversion to elevate H2S emissions by approximately 1.6 ∼ 2.8 times. Structural equations demonstrated that microbial community structure was the dominant driver on H2S emissions. Agents reshaped the compost microbiome, showing more microorganisms participated in sulfur conversion, and enhanced the connection between microorganisms and functional genes. The relative abundance of keystone species associated with H2S emissions increased after adding MA. Particularly, the sulfite and sulfate reduction processes were intensified, as evidenced by an increasing in the abundance and pathways cooperation of sat and asrA after MA addition. The outcome provides deeper insights into MA on regulating the mitigation of H2S emissions in compost.
Collapse
Affiliation(s)
- Houyu Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Xiaojing Li
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
| | - Dandan Zhang
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China; College of Resources and Environment, Jilin Agricultural University, Changchun 130118, China
| | - Yan Xu
- Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China.
| |
Collapse
|
18
|
Xu L, Li L, Lu W, Gu Y, Zhuang H, He Q, Zhu L. The modified properties of sludge-based biochar with ferric sulfate and its effectiveness in promoting carbon release from particulate organic matter in rural household wastewater. ENVIRONMENTAL RESEARCH 2023; 231:116109. [PMID: 37178751 DOI: 10.1016/j.envres.2023.116109] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/28/2023] [Accepted: 05/10/2023] [Indexed: 05/15/2023]
Abstract
The scarcity of carbon sources presents a significant challenge for the bio-treatment of rural domestic wastewater (RDW). This paper presented an innovative approach to address this issue by investigating the supplementary carbon source through in-situ degradation of particulate organic matter (POM) facilitated by ferric sulfate modified sludge-based biochar (SBC). To prepare SBC, five different contents of ferric sulfate (0%, 10%, 20%, 25%, and 33.3%) were added to sewage sludge. The results revealed that the pore and surface of SBC were enhanced, providing active sites and functional groups to accelerate the biodegradation of protein and polysaccharide. During the 8-day hydrolysis period, the concentration of soluble chemical oxidation demand (SCOD) increased and peaked (1087-1156 mg L-1) on the fourth day. The C/N ratio increased from 3.50 (control) to 5.39 (25% ferric sulfate). POM was degraded the five dominant phyla, which were Actinobacteriota, Firmicutes, Synergistota, Proteobacteria, and Bacteroidetes. Although the relative abundance of dominant phyla changed, the metabolic pathway remained unchanged. The leachate of SBC (<20% ferric sulfate) was beneficial for microbes, but an excessive amount of ferric sulfate (33.3% ferric sulfate) could have inhibition effects on bacteria. In conclusion, ferric sulfate modified SBC holds the potential for the carbon degradation of POM in RDW, and further improvements should be made in future studies.
Collapse
Affiliation(s)
- Linji Xu
- Faculty of Environment and Ecology, Chongqing University, Chongqing, 400044, China
| | - Lin Li
- Faculty of Environment and Ecology, Chongqing University, Chongqing, 400044, China
| | - Wei Lu
- Sanfeng Industry of Chongqing Iron and Steal Group Co., Ltd., Chongqing, 401258, China
| | - Yilu Gu
- Faculty of Environment and Ecology, Chongqing University, Chongqing, 400044, China
| | - Huichuan Zhuang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR, China.
| | - Qiang He
- Faculty of Environment and Ecology, Chongqing University, Chongqing, 400044, China
| | - Lei Zhu
- Jiangsu Yihuan Group Co., Ltd., Yixing, Jiangsu, 214206, China.
| |
Collapse
|