1
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Danaee S, Naghoosi H, Badali Varzaghani N, Vo PHN. Biodegradation of human faecal sludge for photosynthetic bioelectricity generation and seawater desalination in a microbial desalination cell. ENVIRONMENTAL TECHNOLOGY 2024; 45:4887-4899. [PMID: 37965746 DOI: 10.1080/09593330.2023.2283406] [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: 06/18/2023] [Accepted: 10/02/2023] [Indexed: 11/16/2023]
Abstract
ABSTRACTInaccessibility and expensiveness of vital infrastructures are the main problems in some urban and rural areas to supply fresh water, sustainable energy, and wastewater treatment. An effective solution is the integration of several systems in an environmentally friendly technology of the photosynthetic microbial desalination cell (PMDC). The aim of this study is to assess the process characterisation of an algae-based PMDC, which was loaded with a high-strength mixture of human feces and urine (HFS). The PMDC was also able to efficiently remove COD and total nitrogen of HFS by 50% and 94%, respectively. The maximum power density, voltage, and desalination efficiency of 362.5 mW/m², 175.2 mV, and 60% were accomplished. Adequate parameter adjustment led to a remarkable maximum of 2.25 g/L.d in the ion removal rate. In addition, an energy balance was governed showing that zero or positive net energy in PMDC is feasible by replacing the main energy consumers. Based on the results, this type of MDC had a high efficiency for simultaneous saline water desalination and HFS treatment, which makes it attractive for further studies of upscaling and its application in remote areas.
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Affiliation(s)
- Soroosh Danaee
- Biotechnology Department, Iranian Research Organization for Science and Technology, Tehran, Iran
| | - Hamed Naghoosi
- Infectious Diseases Research Center, AJA University of Medical Sciences, Tehran, Iran
| | - Neda Badali Varzaghani
- Department of Chemical Technologies, Iranian Research Organization for Science and Technology, Tehran, Iran
| | - Phong H N Vo
- Climate Change Cluster, Faculty of Science, University of Technology Sydney, Ultimo, Australia
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2
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Ashour M, Mansour AT, Alkhamis YA, Elshobary M. Usage of Chlorella and diverse microalgae for CO 2 capture - towards a bioenergy revolution. Front Bioeng Biotechnol 2024; 12:1387519. [PMID: 39229458 PMCID: PMC11368733 DOI: 10.3389/fbioe.2024.1387519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 08/05/2024] [Indexed: 09/05/2024] Open
Abstract
To address climate change threats to ecosystems and the global economy, sustainable solutions for reducing atmospheric carbon dioxide (CO2) levels are crucial. Existing CO2 capture projects face challenges like high costs and environmental risks. This review explores leveraging microalgae, specifically the Chlorella genus, for CO2 capture and conversion into valuable bioenergy products like biohydrogen. The introduction section provides an overview of carbon pathways in microalgal cells and their role in CO2 capture for biomass production. It discusses current carbon credit industries and projects, highlighting the Chlorella genus's carbon concentration mechanism (CCM) model for efficient CO2 sequestration. Factors influencing microalgal CO2 sequestration are examined, including pretreatment, pH, temperature, irradiation, nutrients, dissolved oxygen, and sources and concentrations of CO2. The review explores microalgae as a feedstock for various bioenergy applications like biodiesel, biooil, bioethanol, biogas and biohydrogen production. Strategies for optimizing biohydrogen yield from Chlorella are highlighted. Outlining the possibilities of further optimizations the review concludes by suggesting that microalgae and Chlorella-based CO2 capture is promising and offers contributions to achieve global climate goals.
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Affiliation(s)
- Mohamed Ashour
- National Institute of Oceanography and Fisheries (NIOF), Cairo, Egypt
| | - Abdallah Tageldein Mansour
- Animal and Fish Production Department, College of Agricultural and Food Sciences, King Faisal University, Al-Ahsa, Saudi Arabia
- Department of Fish and Animal Production, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, Egypt
| | - Yousef A. Alkhamis
- Animal and Fish Production Department, College of Agricultural and Food Sciences, King Faisal University, Al-Ahsa, Saudi Arabia
- Water and Environment Study Center, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Mostafa Elshobary
- Department of Botany and microbiology, Faculty of Science, Tanta University, Tanta, Egypt
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3
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Comley JG, Scott JA, Laamanen CA. Utilizing CO 2 in industrial off-gas for microalgae cultivation: considerations and solutions. Crit Rev Biotechnol 2024; 44:910-923. [PMID: 37500178 DOI: 10.1080/07388551.2023.2233692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 05/24/2023] [Accepted: 06/17/2023] [Indexed: 07/29/2023]
Abstract
The utilization of microalgae to treat carbon dioxide (CO2)-rich industrial off-gas has been suggested as both beneficial for emissions reduction and economically favorable for the production of microalgal products. Common sources of off-gases include coal combustion (2-15% CO2), cement production (8-15% CO2), coke production (18-23% CO2), and ore smelting (6-7% CO2). However, industrial off-gas also commonly contains other acid gas components [typically nitrogen oxides (NOX) and sulfur dioxide (SO2)] and metals that could inhibit microalgae growth and productivity. To utilize industrial off-gas effectively in microalgae cultivation systems, a number of solutions have been proposed to overcome potential inhibitions. These include bioprospecting to identify suitable strains, genetic modification to improve specific cellular characteristics, chemical additions, and bioreactor designs and operating procedures.In this review, results from microalgae experiments related to utilizing off-gas are presented, and the outcomes of different conditions discussed along with potential solutions to resolve limitations associated with the application of off-gas.
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Affiliation(s)
- Jacob G Comley
- School of Engineering and Computer Science, Laurentian University, Sudbury, Canada
| | - John A Scott
- School of Engineering and Computer Science, Laurentian University, Sudbury, Canada
| | - Corey A Laamanen
- School of Engineering and Computer Science, Laurentian University, Sudbury, Canada
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Primo TARDC, Vargas LB, Alves RD, de Farias Neves F, Skoronski E. New insights into chicken processing wastewater treatment: the role of the microalgae Parachlorella kessleri on nitrogen removal. ENVIRONMENTAL TECHNOLOGY 2024:1-13. [PMID: 39052955 DOI: 10.1080/09593330.2024.2381643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 07/09/2024] [Indexed: 07/27/2024]
Abstract
Microalgal Technologies have recently been employed as an alternative treatment for high nitrogen content wastewater. Nitrogen is an essential nutrient for microalgae growth, and its presence in wastewater may be an alternative source to synthetic medium, contributing to a circular economy. This study aimed to investigate the effect of using Parachlorella kessleri cultivated in wastewater from the thermal processing of chicken meat. Experiments were performed to obtain the ideal sampling site, inoculum dosage, and contact time. P. kessleri had better growth in the sample from the settling basin. Nitrogen removal was 95% (0,15 mg TNK/107 cells) in 9 days, and the final nitrogen concentration was lower than 20 mg/L, and the nitrate concentration was lower than 1 mg/L. However, during the third cycle in the kinetic assay, there was a decline in the microalgae growth, occasioned by the accumulation of nitrite (38,4 mg/L) in the inside of the cell. The study demonstrated that nitrogen concentration is directly related to the cell growth of the algae. Parachlorella kessleri efficiently removed nitrogen from chicken meat thermal processing wastewater and is a potential option for tertiary treatment and valorisation of such effluent as a nitrogen source.
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Affiliation(s)
- Thais Agda R da C Primo
- Department of Environmental and Sanitary Engineering, Laboratory for Water and Waste Treatment, Santa Catarina State University, Lages, Brazil
| | - Luana Búrigo Vargas
- Department of Environmental and Sanitary Engineering, Laboratory for Water and Waste Treatment, Santa Catarina State University, Lages, Brazil
| | - Rafaela Dexcheimer Alves
- Department of Environmental and Sanitary Engineering, Laboratory for Water and Waste Treatment, Santa Catarina State University, Lages, Brazil
| | - Fabio de Farias Neves
- Department of Fisheries Engineering and Biological Sciences, Laboratory of Alga Cultivation and Biotechnology, Santa Catarina State University, Laguna, Brazil
| | - Everton Skoronski
- Department of Environmental and Sanitary Engineering, Laboratory for Water and Waste Treatment, Santa Catarina State University, Lages, Brazil
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Murugan C, Subbian S, Kaliyaperumal S, Sadasivuni KK, Siddiqui MIH, Muthusamy S, Rosen MA, Prakash C, Chan CK. An event triggered control scheme for enhanced production of Escherichia coli and biomass concentration during fed-batch cultivation. Heliyon 2024; 10:e32210. [PMID: 38975212 PMCID: PMC11226784 DOI: 10.1016/j.heliyon.2024.e32210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 05/08/2024] [Accepted: 05/29/2024] [Indexed: 07/09/2024] Open
Abstract
Control of a bioprocess is a challenging task mainly due to the nonlinearity of the process, the complex nature of microorganisms, and variations in critical parameters such as temperature, pH, and agitator speed. Generally, the optimum values chosen for critical parameters during Escherichia coli (E.coli) K-12fed-batch fermentation are37 ᵒC for temperature, 7 for pH, and 35 % for Dissolved Oxygen (DO). The objective of this research is to enhance biomass concentration while minimizing energy consumption. To achieve this, an Event-Triggered Control (ETC) scheme based on feedback-feed forward control is proposed. The ETC system dynamically adjusts the substrate feed rate in response to variations in critical parameters. We compare the performance of classical Proportional Integral (PI) controllers and advanced Model Predictive Control (MPC) controllers in terms of bioprocess yield. Initially, the data are collected from a laboratory-scaled 3L bioreactor setup under fed-batch operating conditions, and data-driven models are developed using system identification techniques. Then, classical Proportional Integral (PI) and advanced Model Predictive Control (MPC) based feedback controllers are developed for controlling the yield of bioprocess by manipulating substrate flow rate, and their performances are compared. PI and MPC-based Event Triggered Feed Forward Controllers are designed to increase the yield and to suppress the effect of known disturbances due to critical parameters. Whenever there is a variation in the value of a critical parameter, it is considered an event, and ETC initiates a control action by manipulating the substrate feed rate. PI and MPC-based ETC controllers are developed in simulation, and their closed-loop performances are compared. It is observed that the Integral Square Error (ISE) is notably minimized to 4.668 for MPC with disturbance and 4.742 for MPC with Feed Forward Control. Similarly, the Integral Absolute Error (IAE) reduces to 2.453 for MPC with disturbance and 0.8124 for MPC with Feed Forward Control. The simulation results reveal that the MPC-based ETC control scheme enhances the biomass yield by 7 %, and this result is verified experimentally. This system dynamically adjusts the substrate feed rate in response to variations in critical parameters, which is a novel approach in the field of bioprocess control. Also, the proposed control schemes help reduce the frequency of communication between controller and actuator, which reduces power consumption.
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Affiliation(s)
- Chitra Murugan
- Department of Electronics and Communication Engineering, Bharath Institute of Higher Education and Research (Deemed to be University), Chennai, Tamil Nadu, India
| | - Sutha Subbian
- Department of Instrumentation Engineering, Madras Institute of Technology Campus, Anna University Chennai, Tamil Nadu, India
| | - Saravanan Kaliyaperumal
- Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology (Deemed to be University), Kattankulathur, Chennai, Tamil Nadu, India
| | - Kishor Kumar Sadasivuni
- Centre for Advanced Materials, Qatar University, Qatar
- Department of Mechanical and Industrial Engineering, Qatar University, Qatar
| | | | - Suresh Muthusamy
- Department of Electrical and Electronics Engineering, Kongu Engineering College (Autonomous), Perundurai, Erode, Tamil Nadu, India
| | - Marc A. Rosen
- Department of Mechanical and Manufacturing Engineering, Faculty of Engineering and Applied Sciences, University of Ontario Institute of Technology, Oshawa, Canada
- Centre for Research Impact and Outcomes, Chitkara University, Rajpura, Punjab, India
| | - Chander Prakash
- Faculty of Engineering and Quantity Surveying, INTI International University, Putra Nilai, 71800, Nilai, Negeri Sembilan, Malaysia
| | - Choon Kit Chan
- Faculty of Engineering and Quantity Surveying, INTI International University, Putra Nilai, 71800, Nilai, Negeri Sembilan, Malaysia
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Xu P, Shao S, Qian J, Li J, Xu R, Liu J, Zhou W. Scale-up of microalgal systems for decarbonization and bioproducts: Challenges and opportunities. BIORESOURCE TECHNOLOGY 2024; 398:130528. [PMID: 38437968 DOI: 10.1016/j.biortech.2024.130528] [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: 01/11/2024] [Revised: 03/01/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
The threat of global climate change presents a significant challenge for humanity. Microalgae-based carbon capture and utilization (CCU) technology has emerged as a promising solution to this global issue. This review aims to comprehensively evaluate the current advancements in scale-up of microalgae cultivation and its applications, specifically focusing on decarbonization from flue gases, organic wastewater remediation, and biogas upgrading. The study identifies critical challenges that need to be addressed during the scale-up process and evaluates the economic viability of microalgal CCU within the carbon market. Additionally, it analyzes the commercial status of microalgae-derived products and highlights those with high market demand. This review serves as a crucial resource for researchers, industry professionals, and policymakers to develop and implement innovative approaches to enhance the efficiency of microalgae-based CO2 utilization while addressing the challenges associated with the scale-up of microalgae technologies.
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Affiliation(s)
- Peilun Xu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Shengxi Shao
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Jun Qian
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Jingjing Li
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Rui Xu
- Jiangxi Ganneng Co., Ltd, Nanchang 330096, China.
| | - Jin Liu
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
| | - Wenguang Zhou
- Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, and Center for Algae Innovation & Engineering Research, School of Resources & Environment, Nanchang University, Nanchang 330031, China.
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7
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Wagner H, Schad A, Höhmann S, Briol TA, Wilhelm C. Carbon and energy balance of biotechnological glycolate production from microalgae in a pre-industrial scale flat panel photobioreactor. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2024; 17:42. [PMID: 38486283 PMCID: PMC10941469 DOI: 10.1186/s13068-024-02479-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 02/15/2024] [Indexed: 03/17/2024]
Abstract
Glycolate is produced by microalgae under photorespiratory conditions and has the potential for sustainable organic carbon production in biotechnology. This study explores the glycolate production balance in Chlamydomonas reinhardtii, using a custom-built 10-L flat panel bioreactor with sophisticated measurements of process factors such as nutrient supply, gassing, light absorption and mass balances. As a result, detailed information regarding carbon and energy balance is obtained to support techno-economic analyses. It is shown how nitrogen is a crucial element in the biotechnological process and monitoring nitrogen content is vital for optimum performance. Moreover, the suitable reactor design is advantageous to efficiently adjust the gas composition. The oxygen content has to be slightly above 30% to induce photorespiration while maintaining photosynthetic efficiency. The final volume productivity reached 27.7 mg of glycolate per litre per hour, thus, the total process capacity can be calculated to 13 tonnes of glycolate per hectare per annum. The exceptional volume productivity of both biomass and glycolate production is demonstrated, and consequently can achieve a yearly CO2 sequestration rate of 35 tonnes per hectare. Although the system shows such high productivity, there are still opportunities to enhance the achieved volume productivity and thus exploit the biotechnological potential of glycolate production from microalgae.
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Affiliation(s)
- Heiko Wagner
- Department of Algal Biotechnology, Institute for Biology, University of Leipzig, Permoserstrasse 15, 04318, Leipzig, Germany.
| | - Antonia Schad
- Department of Algal Biotechnology, Institute for Biology, University of Leipzig, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Sonja Höhmann
- Department of Solar Materials, Helmholtz Center for Environmental Research-UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Tim Arik Briol
- Department of Solar Materials, Helmholtz Center for Environmental Research-UFZ, Permoserstrasse 15, 04318, Leipzig, Germany
| | - Christian Wilhelm
- Department of Algal Biotechnology, Institute for Biology, University of Leipzig, Permoserstrasse 15, 04318, Leipzig, Germany
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8
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López-Patiño AM, Cárdenas-Orrego A, Torres AF, Navarrete D, Champagne P, Ochoa-Herrera V. Native microalgal-bacterial consortia from the Ecuadorian Amazon region: an alternative to domestic wastewater treatment. Front Bioeng Biotechnol 2024; 12:1338547. [PMID: 38468686 PMCID: PMC10925762 DOI: 10.3389/fbioe.2024.1338547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/29/2024] [Indexed: 03/13/2024] Open
Abstract
In low-middle income countries (LMIC), wastewater treatment using native microalgal-bacterial consortia has emerged as a cost-effective and technologically-accessible remediation strategy. This study evaluated the effectiveness of six microalgal-bacterial consortia (MBC) from the Ecuadorian Amazon in removing organic matter and nutrients from non-sterilized domestic wastewater (NSWW) and sterilized domestic wastewater (SWW) samples. Microalgal-bacterial consortia growth, in NSWW was, on average, six times higher than in SWW. Removal rates (RR) for NH4 +- N and PO4 3--P were also higher in NSWW, averaging 8.04 ± 1.07 and 6.27 ± 0.66 mg L-1 d-1, respectively. However, the RR for NO3 - -N did not significantly differ between SWW and NSWW, and the RR for soluble COD slightly decreased under non-sterilized conditions (NSWW). Our results also show that NSWW and SWW samples were statistically different with respect to their nutrient concentration (NH4 +-N and PO4 3--P), organic matter content (total and soluble COD and BOD5), and physical-chemical parameters (pH, T, and EC). The enhanced growth performance of MBC in NSWW can be plausibly attributed to differences in nutrient and organic matter composition between NSWW and SWW. Additionally, a potential synergy between the autochthonous consortia present in NSWW and the native microalgal-bacterial consortia may contribute to this efficiency, contrasting with SWW where no active autochthonous consortia were observed. Finally, we also show that MBC from different localities exhibit clear differences in their ability to remove organic matter and nutrients from NSWW and SWW. Future research should focus on elucidating the taxonomic and functional profiles of microbial communities within the consortia, paving the way for a more comprehensive understanding of their potential applications in sustainable wastewater management.
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Affiliation(s)
- Amanda M. López-Patiño
- Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Ana Cárdenas-Orrego
- Instituto de Microbiología, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Andrés F. Torres
- Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Danny Navarrete
- Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito USFQ, Quito, Ecuador
| | - Pascale Champagne
- Department of Civil Engineering, Queen’s University, Kingston, ON, Canada
| | - Valeria Ochoa-Herrera
- Colegio de Ciencias e Ingeniería, Universidad San Francisco de Quito USFQ, Quito, Ecuador
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
- Escuela de Ingeniería, Ciencia y Tecnología, Universidad del Rosario, Bogotá, Colombia
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Rossi S, Carecci D, Marazzi F, Di Benedetto F, Mezzanotte V, Parati K, Alberti D, Geraci I, Ficara E. Integrating microalgae growth in biomethane plants: Process design, modelling, and cost evaluation. Heliyon 2024; 10:e23240. [PMID: 38163195 PMCID: PMC10755323 DOI: 10.1016/j.heliyon.2023.e23240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 01/03/2024] Open
Abstract
The integration of microalgae cultivation in anaerobic digestion (AD) plants can take advantage of relevant nutrients (ammonium and ortho-phosphate) and CO2 loads. The proposed scheme of microalgae integration in existing biogas plants aims at producing approximately 250 t·y-1 of microalgal biomass, targeting the biostimulants market that is currently under rapid expansion. A full-scale biorefinery was designed to treat 50 kt·y-1 of raw liquid digestate from AD and 0.45 kt·y-1 of CO2 from biogas upgrading, and 0.40 kt·y-1 of sugar-rich solid by-products from a local confectionery industry. An innovative three-stage cultivation process was designed, modelled, and verified, including: i) microalgae inoculation in tubular PBRs to select the desired algal strains, ii) microalgae cultivation in raceway ponds under greenhouses, and iii) heterotrophic microalgae cultivation in fermenters. A detailed economic assessment of the proposed biorefinery allowed to compute a biomass production cost of 2.8 ± 0.3 €·kg DW-1, that is compatible with current downstream process costs to produce biostimulants, suggesting that the proposed nutrient recovery route is feasible from the technical and economic perspective. Based on the case study analysis, a discussion of process, bioproducts and policy barriers that currently hinder the development of microalgae-based biorefineries is presented.
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Affiliation(s)
- Simone Rossi
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Davide Carecci
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Francesca Marazzi
- University of Milano – Bicocca, DISAT – Department of Earth and Environmental Sciences, 1, P.zza della Scienza, 20126 Milano, Italy
| | - Francesca Di Benedetto
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
| | - Valeria Mezzanotte
- University of Milano – Bicocca, DISAT – Department of Earth and Environmental Sciences, 1, P.zza della Scienza, 20126 Milano, Italy
| | - Katia Parati
- Istituto Sperimentale Italiano Lazzaro Spallanzani, Aquaculture division, 26027 Rivolta d’Adda, Italy
| | | | | | - Elena Ficara
- Politecnico di Milano, DICA – Department of Civil and Environmental Engineering, 2, P.zza Leonardo da Vinci, 20133 Milano, Italy
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10
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Baumschabl M, Mitic BM, Troyer C, Hann S, Ata Ö, Mattanovich D. A native phosphoglycolate salvage pathway of the synthetic autotrophic yeast Komagataella phaffii. MICROLIFE 2023; 5:uqad046. [PMID: 38234447 PMCID: PMC10791038 DOI: 10.1093/femsml/uqad046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 11/10/2023] [Accepted: 12/09/2023] [Indexed: 01/19/2024]
Abstract
Synthetic autotrophs can serve as chassis strains for bioproduction from CO2 as a feedstock to take measures against the climate crisis. Integration of the Calvin-Benson-Bassham (CBB) cycle into the methylotrophic yeast Komagataella phaffii (Pichia pastoris) enabled it to use CO2 as the sole carbon source. The key enzyme in this cycle is ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) catalyzing the carboxylation step. However, this enzyme is error prone to perform an oxygenation reaction leading to the production of toxic 2-phosphoglycolate. Native autotrophs have evolved different recycling pathways for 2-phosphoglycolate. However, for synthetic autotrophs, no information is available for the existence of such pathways. Deletion of CYB2 in the autotrophic K. phaffii strain led to the accumulation of glycolate, an intermediate in phosphoglycolate salvage pathways, suggesting that such a pathway is enabled by native K. phaffii enzymes. 13C tracer analysis with labeled glycolate indicated that the yeast pathway recycling phosphoglycolate is similar to the plant salvage pathway. This orthogonal yeast pathway may serve as a sensor for RuBisCO oxygenation, and as an engineering target to boost autotrophic growth rates in K. phaffii.
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Affiliation(s)
- Michael Baumschabl
- Austrian Centre of Industrial Biotechnology, Vienna 1190, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, University of Natural Resources and Life Sciences, Vienna 1190, Austria
| | - Bernd M Mitic
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, University of Natural Resources and Life Sciences, Vienna 1190, Austria
- University of Natural Resources and Life Sciences, Vienna, Department of Chemistry, Institute of Analytical Chemistry, Vienna 1190, Austria
| | - Christina Troyer
- University of Natural Resources and Life Sciences, Vienna, Department of Chemistry, Institute of Analytical Chemistry, Vienna 1190, Austria
| | - Stephan Hann
- Austrian Centre of Industrial Biotechnology, Vienna 1190, Austria
- University of Natural Resources and Life Sciences, Vienna, Department of Chemistry, Institute of Analytical Chemistry, Vienna 1190, Austria
| | - Özge Ata
- Austrian Centre of Industrial Biotechnology, Vienna 1190, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, University of Natural Resources and Life Sciences, Vienna 1190, Austria
| | - Diethard Mattanovich
- Austrian Centre of Industrial Biotechnology, Vienna 1190, Austria
- Department of Biotechnology, Institute of Microbiology and Microbial Biotechnology, University of Natural Resources and Life Sciences, Vienna 1190, Austria
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11
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Rana S, Kumar A. Ecotoxicity of a mixture of nanoparticles on algal species Scendesmus obliquus in OECD growth media, wastewater, and pond water. ECOTOXICOLOGY (LONDON, ENGLAND) 2023; 32:1257-1271. [PMID: 38062282 DOI: 10.1007/s10646-023-02718-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/21/2023] [Indexed: 12/18/2023]
Abstract
The possible impact of ZnO and CuO nanoparticles (NPs) (individually and in binary mixture) was investigated using the freshwater microalgae, Scenedesmus obliquus. The present study shows the effect of nanoparticles on algae in OECD growth media, wastewater, and pond water during a 96-h toxicity test. At 0.1 mg/L concentration of the mixture of NPs, the reduction in the chlorophyll a content was 13.61 ± 1.34% (OECD media), 28.83 ± 1.85% (wastewater), and 31.81 ± 2.23% (pond water). Values of reduction in biomass were observed to be 42.13 ± 1.38, 39.96 ± 1.03, and 33.10 ± 1.29% for OECD media, wastewater, and pond water, respectively. The highest increase in lipid values was observed in the case of pond water (6.3 ± 1.31%). A significant increase in the value of EPS-generated protein was observed in the wastewater sample. EPS-generated carbohydrate values were increased in OECD media but decreased in the wastewater matrix. The transmission electron microscope images showed structural damage to algae cells due to the exposure to a mixture of nanoparticles at higher concentrations. Fourier transform infrared analysis showed an addition of bonds and differences in the peak and its intensity during exposure to high concentrations of NPs. Overall, this study gives fundamental insights into the interaction and toxicity of a mixture of NPs to algal species in different water matrices.
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Affiliation(s)
- Samridhi Rana
- Graduate Student, Indian Institute of Technology, New Delhi, India
| | - Arun Kumar
- Department of Civil Engineering, Indian Institute of Technology, New Delhi, India.
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12
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Li Q, Xu Y, Liang C, Peng L, Zhou Y. Nitrogen removal by algal-bacterial consortium during mainstream wastewater treatment: Transformation mechanisms and potential N 2O mitigation. WATER RESEARCH 2023; 235:119890. [PMID: 36958220 DOI: 10.1016/j.watres.2023.119890] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 02/08/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
This work investigated nitrogen transformation pathways of the algal-bacterial consortium as well as its potential in reducing nitrous oxide (N2O) emission in enclosed, open and aerated reactors. The results confirmed the superior ammonium removal performance of the algal-bacterial consortium relative to the single algae (Chlorella vulgaris) or the activated sludge, achieving the highest efficiency at 100% and the highest rate of 7.34 mg N g MLSS-1 h-1 in the open reactor with glucose. Enhanced total nitrogen (TN) removal (to 74.6%) by the algal-bacterial consortium was achieved via mixotrophic algal assimilation and bacterial denitrification under oxygen-limited and glucose-sufficient conditions. Nitrogen distribution indicated that ammonia oxidation (∼41.8%) and algal assimilation (∼43.5%) were the main pathways to remove ammonium by the algal-bacterial consortium. TN removal by the algal-bacterial consortium was primarily achieved by algal assimilation (28.1-40.8%), followed by bacterial denitrification (2.9-26.5%). Furthermore, the algal-bacterial consortium contributed to N2O mitigation compared with the activated sludge, reducing N2O production by 35.5-55.0% via autotrophic pathways and by 81.0-93.6% via mixotrophic pathways. Nitrogen assimilation by algae was boosted with the addition of glucose and thus largely restrained N2O production from nitrification and denitrification. The synergism between algae and bacteria was also conducive to an enhanced N2O reduction by denitrification and reduced direct/indirect carbon emissions.
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Affiliation(s)
- Qi Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
| | - Yifeng Xu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
| | - Chuanzhou Liang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China
| | - Lai Peng
- Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, China.
| | - Yan Zhou
- School of Civil and Environmental Engineering, Nanyang Technological University 639798, Singapore
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13
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Muloiwa M, Dinka M, Nyende‐Byakika S. Application of Artificial Neural Network for predicting biomass growth during domestic wastewater treatment through a biological process. Eng Life Sci 2023; 23:e2200058. [PMID: 37153027 PMCID: PMC10158627 DOI: 10.1002/elsc.202200058] [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: 10/10/2022] [Revised: 03/05/2023] [Accepted: 03/12/2023] [Indexed: 05/09/2023] Open
Abstract
The biological treatment process is responsible for removing organic and inorganic matter in wastewater. This process relies heavily on microorganisms to successfully remove organic and inorganic matter. The aim of the study was to model biomass growth in the biological treatment process. Multilayer perceptron (MLP) Artificial Neural Network (ANN) algorithm was used to model biomass growth. Three metrics: coefficient of determination (R 2), root mean squared error (RMSE), and mean squared error (MSE) were used to evaluate the performance of the model. Sensitivity analysis was applied to confirm variables that have a strong influence on biomass growth. The results of the study showed that MLP ANN algorithm was able to model biomass growth successfully. R 2 values were 0.844, 0.853, and 0.823 during training, validation, and testing phases, respectively. RMSE values were 0.7476, 1.1641, and 0.7798 during training, validation, and testing phases respectively. MSE values were 0.5589, 1.3551, and 0.6081 during training, validation, and testing phases, respectively. Sensitivity analysis results showed that temperature (47.2%) and dissolved oxygen (DO) concentration (40.2%) were the biggest drivers of biomass growth. Aeration period (4.3%), chemical oxygen demand (COD) concentration (3.2%), and oxygen uptake rate (OUR) (5.1%) contributed minimally. The biomass growth model can be applied at different wastewater treatment plants by different plant managers/operators in order to achieve optimum biomass growth. The optimum biomass growth will improve the removal of organic and inorganic matter in the biological treatment process.
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Affiliation(s)
- Mpho Muloiwa
- Department of Civil EngineeringTshwane University of TechnologyPretoriaSouth Africa
| | - Megersa Dinka
- Department of Civil Engineering ScienceUniversity of JohannesburgJohannesburgSouth Africa
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14
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Maroušek J, Maroušková A, Gavurová B, Tuček D, Strunecký O. Competitive algae biodiesel depends on advances in mass algae cultivation. BIORESOURCE TECHNOLOGY 2023; 374:128802. [PMID: 36858122 DOI: 10.1016/j.biortech.2023.128802] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
The aim of this review was to study why, despite large investments in research and development, algae biodiesel is still not price competitive with fossil fuels. Microalgal production was confirmed to be a critical cost item (84 up to 93 %) for biodiesel regardless of the production technology. Techno-economic assessment revealed the main cost drivers during mass cultivation. It is argued that a breakthrough in the cultivation efficiency of microalgae is identified as a necessary condition for achieving price-competitive microalgal biodiesel. The key bottlenecks were identified as follows: (1) light and O2 concentration management; (2) overnight respiratory loss of oil. It is concluded that most of the research on microalgae biodiesel yields economically over-optimistic presumptions because it has been based on laboratory scale experiments with a low level of interdisciplinary overlap.
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Affiliation(s)
- Josef Maroušek
- Institute of Technology and Business in České Budějovice, Faculty of Technology, Okružní 517/10, České Budějovice 370 01, Czech Republic; University of South Bohemia in České Budějovice, Faculty of Agriculture, Studentská 1668, České Budějovice 370 05, Czech Republic.
| | - Anna Maroušková
- Institute of Technology and Business in České Budějovice, Faculty of Technology, Okružní 517/10, České Budějovice 370 01, Czech Republic
| | - Beata Gavurová
- Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnologies, Letna 9, Košice 042 00, Slovakia
| | - David Tuček
- Tomas Bata University in Zlín, Faculty of Management and Economics, Mostní 5139, Zlín 760 01, Czech Republic
| | - Otakar Strunecký
- Institute of Technology and Business in České Budějovice, Faculty of Technology, Okružní 517/10, České Budějovice 370 01, Czech Republic; University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, Na Sádkách 1780, 370 05 České Budějovice, Czech Republic
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15
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Kubar AA, Kumar S, Liu W, Cui Y, Zhu F, Xu X, Shao C, Hu X, Prempeh NYA, Huo S. Numerical simulation of vortex flow field generated in a novel nested-bottled photobioreactor to improve Arthrospira platensis growth. BIORESOURCE TECHNOLOGY 2023; 373:128710. [PMID: 36754237 DOI: 10.1016/j.biortech.2023.128710] [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: 01/01/2023] [Revised: 02/03/2023] [Accepted: 02/04/2023] [Indexed: 06/18/2023]
Abstract
In this study, computational fluid dynamics were employed to examined clockwise and anticlockwise vortexes in the rising and down coming sections of novel nested-bottle photobioreactor. The radial velocity was increased by four times which significantly reduced dead zones compared to traditional PBR. The (NB-PBR) comprised of integrated bottles connected by curved tubes (d = 4 cm) that generated dominant vortices as the microalgae solution flows through each section (h = 10 cm). The (NB-PBR) was independent of the inner and outer sections which increased the mixing time and mass-transfer coefficient by 13.33 % and 42.9 %, respectively. Furthermore, the results indicated that the (NB-PBR) showed higher photosynthesis efficiency preventing self-shading and photo-inhibition, resulting in an increase in biomass yield and carbon dioxide fixation by 35 % and 35.9 %, respectively.
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Affiliation(s)
- Ameer Ali Kubar
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Santosh Kumar
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Wei Liu
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Centre, Jinan 250014, China.
| | - Yi Cui
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Feifei Zhu
- School of Life Sciences, Jiangsu University, Zhenjiang 212013, China.
| | - Xiangru Xu
- School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Cong Shao
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | - Xinjuan Hu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
| | | | - Shuhao Huo
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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16
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Khandelwal A, Chhabra M, Lens PNL. Integration of third generation biofuels with bio-electrochemical systems: Current status and future perspective. FRONTIERS IN PLANT SCIENCE 2023; 14:1081108. [PMID: 36844066 PMCID: PMC9950272 DOI: 10.3389/fpls.2023.1081108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 01/20/2023] [Indexed: 06/18/2023]
Abstract
Biofuels hold particular promise as these can replace fossil fuels. Algae, in particular, are envisioned as a sustainable source of third-generation biofuels. Algae also produce several low volume high-value products, which enhance their prospects of use in a biorefinery. Bio-electrochemical systems such as microbial fuel cell (MFC) can be used for algae cultivation and bioelectricity production. MFCs find applications in wastewater treatment, CO2 sequestration, heavy metal removal and bio-remediation. Oxidation of electron donor by microbial catalysts in the anodic chamber gives electrons (reducing the anode), CO2, and electrical energy. The electron acceptor at the cathode can be oxygen/NO3 -/NO2 -/metal ions. However, the need for a continuous supply of terminal electron acceptor in the cathode can be eliminated by growing algae in the cathodic chamber, as they produce enough oxygen through photosynthesis. On the other hand, conventional algae cultivation systems require periodic oxygen quenching, which involves further energy consumption and adds cost to the process. Therefore, the integration of algae cultivation and MFC technology can eliminate the need of oxygen quenching and external aeration in the MFC system and thus make the overall process sustainable and a net energy producer. In addition to this, the CO2 gas produced in the anodic chamber can promote the algal growth in the cathodic chamber. Hence, the energy and cost invested for CO2 transportation in an open pond system can be saved. In this context, the present review outlines the bottlenecks of first- and second-generation biofuels along with the conventional algae cultivation systems such as open ponds and photobioreactors. Furthermore, it discusses about the process sustainability and efficiency of integrating algae cultivation with MFC technology in detail.
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Affiliation(s)
- Amitap Khandelwal
- Ryan Institute, School of Natural Sciences, University of Galway, Galway, Ireland
| | - Meenu Chhabra
- Environmental Biotechnology Lab, Department of Biosciences & Bioengineering, Indian Institute of Technology, Jodhpur, India
| | - Piet N. L. Lens
- Ryan Institute, School of Natural Sciences, University of Galway, Galway, Ireland
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17
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High cell density culture of Neochloris oleoabundans in novel horizontal thin-layer algal reactor: effects of localized aeration, nitrate concentration and mixing frequency. Biochem Eng J 2023. [DOI: 10.1016/j.bej.2023.108839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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18
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Shareefdeen Z, Elkamel A, Babar ZB. Recent Developments on the Performance of Algal Bioreactors for CO 2 Removal: Focusing on the Light Intensity and Photoperiods. BIOTECH (BASEL (SWITZERLAND)) 2023; 12:biotech12010010. [PMID: 36648836 PMCID: PMC9844339 DOI: 10.3390/biotech12010010] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/20/2022] [Accepted: 12/30/2022] [Indexed: 01/13/2023]
Abstract
This work presents recent developments of algal bioreactors used for CO2 removal and the factors affecting the reactor performance. The main focus of the study is on light intensity and photoperiods. The role of algae in CO2 removal, types of algal species used in bioreactors and conventional types of bioreactors including tubular bioreactor, vertical airlift reactor, bubble column reactor, flat panel or plate reactor, stirred tank reactor and specific type bioreactors such as hollow fibre membrane and disk photobioreactors etc. are discussed in details with respect to utilization of light. The effects of light intensity, light incident, photoinhibition, light provision arrangements and photoperiod on the performance of algal bioreactors for CO2 removal are also discussed. Efficient operation of algal photobioreactors cannot be achieved without the improvement in the utilization of incident light intensity and photoperiods. The readers may find this article has a much broader significance as algae is not only limited to removal or sequestration of CO2 but also it is used in a number of commercial applications including in energy (biofuel), nutritional and food sectors.
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Affiliation(s)
- Zarook Shareefdeen
- Department of Chemical and Biological Engineering, American University of Sharjah, Sharjah P.O. Box 26666, United Arab Emirates
- Correspondence:
| | - Ali Elkamel
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
- Department of Chemical Engineering, Khalifa University, Abu Dhabi P.O. Box 127788, United Arab Emirates
| | - Zaeem Bin Babar
- Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), Islamabad 44000, Pakistan
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19
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Energy-efficient algal culture through aeration-less oxygen removal in a gas-permeable bag photobioreactor. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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20
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Light and carbon limited photosynthesis of Chlorella sorokiniana. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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21
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Sun X, Li X, Tang S, Lin K, Zhao T, Chen X. A review on algal-bacterial symbiosis system for aquaculture tail water treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 847:157620. [PMID: 35901899 DOI: 10.1016/j.scitotenv.2022.157620] [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: 05/29/2022] [Revised: 07/20/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Aquaculture is one of the fastest growing fields of global food production industry in recent years. To maintain the ecological health of aquaculture water body and the sustainable development of aquaculture industry, the treatment of aquaculture tail water (ATW) is becoming an indispensable task. This paper discussed the demand of environmentally friendly and cost-effective technologies for ATW treatment and the potential of algal-bacterial symbiosis system (ABSS) in ATW treatment. The characteristics of ABSS based technology for ATW treatment were analyzed, such as energy consumption, greenhouse gas emission, environmental adaptability and the possibility of removal or recovery of carbon, nitrogen and phosphorus as resource simultaneously. Based on the principle of ABSS, this paper introduced the key environmental factors that should be paid attention to in the establishment of ABSS, and then summarized the species of algae, bacteria and the proportion of algae and bacteria commonly used in the establishment of ABSS. Finally, the reactor technologies and the relevant research gaps in the establishment of ABSS were reviewed and discussed.
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Affiliation(s)
- Xiaoyan Sun
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519082 Zhuhai, China.
| | - Xiaopeng Li
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China
| | - Shi Tang
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China
| | - Kairong Lin
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519082 Zhuhai, China
| | - Tongtiegang Zhao
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), 519082 Zhuhai, China
| | - Xiaohong Chen
- School of Civil Engineering, Sun Yat-sen University, 519082 Zhuhai, China; Center for Water Resources and Environment Research, Sun Yat-sen University, 510275 Guangzhou, China
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22
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Oxygen stress mitigation for microalgal biomass productivity improvement in outdoor raceway ponds. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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23
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Nguyen DK, Nguyen HQ, Dang HTT, Nguyen VQ, Nguyen L. A low-cost system for monitoring pH, dissolved oxygen and algal density in continuous culture of microalgae. HARDWAREX 2022; 12:e00353. [PMID: 36082147 PMCID: PMC9445390 DOI: 10.1016/j.ohx.2022.e00353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In a continuous and closed system of culturing microalgae, constantly monitoring and controlling pH, dissolved oxygen (DO) and microalgal density in the cultivation environment are paramount, which ultimately influence on the growth rate and quality of the microalgae products. Apart from the pH and DO parameters, the density of microalgae can be used to contemplate what light condition in the culture chamber is or when nutrients should be supplemented, which both also decide productivity of the cultivation. Moreover, the microalgal density is considered as an indicator indicating when the microalgae can be harvested. Therefore, this work proposes a low-cost monitoring equipment that can be employed to observe pH, DO and microalgal density over time in a culture environment. The measurements obtained by the proposed monitoring device can be utilized for not only real-time observations but also controlling other sub-systems in a continuous culture model including stirring, ventilating, nutrient supplying and harvesting, which leads to more efficiency in the microalgal production. More importantly, it is proposed to utilize the off-the-shelf materials to fabricate the equipment with a total cost of about 513 EUR, which makes it practical as well as widespread. The proposed monitoring apparatus was validated in a real-world closed system of cultivating a microalgae strain of Chlorella vulgaris. The obtained results indicate that the measurement accuracies are 0.3%, 3.8% and 8.6% for pH, DO and microalgae density quantities, respectively.
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Affiliation(s)
- Dung Kim Nguyen
- Faculty of Engineering, Vietnam National University of Agriculture, Hanoi 10000, Viet Nam
| | - Huy Quang Nguyen
- Faculty of Engineering, Vietnam National University of Agriculture, Hanoi 10000, Viet Nam
| | - Huyen Thuy T. Dang
- Faculty of Engineering, Vietnam National University of Agriculture, Hanoi 10000, Viet Nam
| | - Viet Quoc Nguyen
- Faculty of Engineering, Vietnam National University of Agriculture, Hanoi 10000, Viet Nam
| | - Linh Nguyen
- Institute of Innovation, Science and Sustainability, Federation University, Churchill, VIC 3842, Australia
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24
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Kubar AA, Cheng J, Kumar S, Liu S, Tian J. Developing a Zigzag-baffled column photobioreactor to increase mass-transfer, CO2 fixation and biomass yield during A. platensis cultivation. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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25
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Evaporation reduction and salinity control in microalgae production ponds using chemical monolayers. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Mohamadnia S, Tavakoli O, Faramarzi MA. Production of fucoxanthin from the microalga Tisochrysis lutea in the bubble column photobioreactor applying mass transfer coefficient. J Biotechnol 2022; 348:47-54. [PMID: 35331727 DOI: 10.1016/j.jbiotec.2022.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 11/30/2022]
Abstract
Fucoxanthin is one of the most vital pigments during photosynthesis and is extracted from golden-brown micro-algae such as Tisochrysis lutea. The present study investigates the constant volumetric mass transfer coefficient (kLa), for the first time as the scale-up strategy to change the scale from 500 mL to 2-L cultivation flasks, and 5-L bubble column photobioreactor for fucoxanthin production in T. lutea. The cell density and fucoxanthin content were improved because of through fine aeration, nutrients, and light availability by successful laboratory scale up. Fucoxanthin productivity obtained 21.20, 22.99, and 24.96 mg L-1day-1 for 500 mL, 2-L bottle, and 5-L bubble column photobioreactor, respectively. In addition, the biomass productivity enhanced from 267.5 to 275 and 284 mg L-1day-1 in three mentioned scales, respectively. Eventually, the scale up process for the production of fucoxanthin was succeeded from 500 mL bottle to 5-L photobioreactor using constant (kLa) under laboratory conditions.
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Affiliation(s)
- Sonia Mohamadnia
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 14176, Iran; Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran 14176-14411, Iran
| | - Omid Tavakoli
- School of Chemical Engineering, College of Engineering, University of Tehran, Tehran 14176, Iran.
| | - Mohammad Ali Faramarzi
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, P.O. Box 14155-6451, Tehran 14176-14411, Iran.
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27
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The Oxygen Paradigm—Quantitative Impact of High Concentrations of Dissolved Oxygen on Kinetics and Large-Scale Production of Arthrospira platensis. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6010014] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The cultivation of Arthrospira platensis in tubular photobioreactors (tPBRs) presents a promising approach for the commercial production of nutraceuticals and food products as it can achieve high productivity and effective process control. In closed photobioreactors, however, high amounts of photosynthetically produced oxygen can accumulate. So far, there has been a wide range of discussion on how dissolved oxygen concentrations (DOCs) affect bioprocess kinetics, and the subject has mainly been assessed empirically. In this study, we used photorespirometry to quantify the impact of DOCs on the growth kinetics and phycocyanin content of the widely cultivated cyanobacterium A. platensis. The photorespirometric routine revealed that the illumination intensity and cell dry weight concentration are important interconnected process parameters behind the impact that DOCs have on the bioprocess kinetics. Unfavorable process conditions such as low biomass concentrations or high illumination intensities yielded significant growth inhibition and reduced the phycocyanin content of A. platensis by up to 35%. In order to predict the biomass productivity of the large-scale cultivation of A. platensis in tPBRs, a simple process model was extended to include photoautotrophic oxygen production and accumulation in the tPBR to evaluate the performance of two configurations of a 5000 L tPBR.
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28
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Van T Do C, Dinh CT, Dang MT, Dang Tran T, Giang Le T. A novel flat-panel photobioreactor for simultaneous production of lutein and carbon sequestration by Chlorella sorokiniana TH01. BIORESOURCE TECHNOLOGY 2022; 345:126552. [PMID: 34906709 DOI: 10.1016/j.biortech.2021.126552] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/06/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Carbon dioxide is the major cause of global warming. However, it is a carbon source for phototrophic production of chemicals from microalgae. In this work, a novel flat-panel photobioreactor (FPP) was used for maximization of biomass and lutein production and CO2 fixation by a lutein-rich C. sorokiniana TH01. CO2 concentration, light intensity and aeration rate were optimized as 5%, 150 µmol/m2/s and 1 L/min, respectively. The highest biomass productivity, lutein productivity and CO2 fixation efficiency were measured for indoor single and sequential FPPs were 284 - 469 mg/L/d, 2.57 - 4.57 mg/L/d, and 63 - 100%, respectively. In a climatic condition of 25.5 - 33 °C and 86 - 600 µmol/m2/s, C. sorokiniana TH01 achieved lutein productivity and CO2 fixation efficiency of 2.1 - 3.03 mg/L/d and 56 - 81%, respectively, while the comparable biomass productivity of 284 - 419 mg/L/d was maintained. This pioneered FPP system was efficiently demonstrated for production of algal lutein from CO2.
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Affiliation(s)
- Cam Van T Do
- HaUI Institute of Technology, Hanoi University of Industry, 298 Cau Dien Street, Bac Tu Liem, Hanoi, Vietnam
| | - Cuc T Dinh
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Mai T Dang
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Thuan Dang Tran
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| | - Truong Giang Le
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
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Mukhopadhyay S, Jana A, Ghosh S, Majumdar S, Ghosh TK. Arthrospira sp. mediated bioremediation of gray water in ceramic membrane based photobioreactor: process optimization by response surface methodology. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2022; 24:1364-1375. [PMID: 35075966 DOI: 10.1080/15226514.2022.2027865] [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] [Indexed: 06/14/2023]
Abstract
Direct discharge of raw domestic sewage enriched with nitrogenous and phosphorous compounds into the water bodies causes eutrophication and other environmental hazards with detrimental impacts on public and ecosystem health. The present study focuses on phycoremediation of gray water with Arthrospira sp. using an innovative hydrophobic ceramic membrane-based photobioreactor system integrated with CO2 biofixation and biodiesel production, aiming for green technology development. Surfactant and oil-rich gray water collected from the domestic kitchen was used wherein, chloride, sulfate, and surfactant concentrations were statistically optimized using response surface methodology (RSM), considering maximum microalgal growth rate as a response for the design. Ideal concentrations (mg/L) of working parameters were found to be 7.91 (sulfate), 880.49 (chloride), and 144.02 (surfactant), respectively to achieve optimum growth rate of 0.43 gdwt/L/day. Enhancement of growth rate of targeted microalgae by 150% with suitable CO2 (19.5%) supply and illumination in the photobioreactor affirms its efficient operation. Additionally, harvested microalgal biomass obtained from the process showed a biodiesel content of around 5.33% (dry weight). The microalgal treatment enabled about 96.82, 87.5, and 99.8% reductions in BOD, COD, and TOC, respectively, indicating the potential of the process in pollutant assimilation and recycling of such wastewater along with value-added product generation.
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Affiliation(s)
- Shritama Mukhopadhyay
- Department of Biotechnology, Heritage Institute of Technology, Kolkata, India
- Water Technology Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, India
| | - Animesh Jana
- Department of Chemical Engineering, Indian Institute of Technology, Kharagpur, India
| | - Sourja Ghosh
- Water Technology Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, India
| | - Swachchha Majumdar
- Water Technology Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, India
| | - Tapan Kumar Ghosh
- Department of Biotechnology, Heritage Institute of Technology, Kolkata, India
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Škufca D, Prosenc F, Griessler Bulc T, Heath E. Removal and fate of 18 bisphenols in lab-scale algal bioreactors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 804:149878. [PMID: 34508933 DOI: 10.1016/j.scitotenv.2021.149878] [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: 06/09/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 06/13/2023]
Abstract
The removal of 18 bisphenols at wastewater relevant concentrations (μg L-1 range) was investigated and compared between Chlorella vulgaris cultures with pH adjusted to 6.8 and pH non-adjusted cultures where pH raised to above 10. Bisphenols with a high partition coefficient (log P > 6) partitioned to biomass soon after spiking, whereas bisphenols with a low partition coefficient (log P < 4) remained largely in the aqueous phase. Hydrophobic bisphenols and BPF isomers were removed to a large degree in pH adjusted conditions, while BPS and BPAF were the most recalcitrant. The overall average removal after 13 days was similar in both experiments, with 72 ± 2% and 73 ± 5% removed in pH non-adjusted and pH adjusted series, respectively. The removal correlated with chlorophyll a concentration for most bisphenols meaning that algae played a crucial role in their removal, while culture pH also governed the removal of some compounds.
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Affiliation(s)
- David Škufca
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana, Slovenia
| | - Franja Prosenc
- Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia
| | - Tjaša Griessler Bulc
- Faculty of Health Sciences, University of Ljubljana, Zdravstvena pot 5, 1000 Ljubljana, Slovenia; Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, 1000 Ljubljana, Slovenia
| | - Ester Heath
- Department of Environmental Sciences, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia; Jožef Stefan International Postgraduate School, Jamova cesta 39, 1000 Ljubljana, Slovenia.
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31
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Algae-Assisted Microbial Desalination Cell: Analysis of Cathode Performance and Desalination Efficiency Assessment. Processes (Basel) 2021. [DOI: 10.3390/pr9112011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Algae-assisted microbial desalination cells represent a sustainable technology for low-energy fresh water production in which microalgae culture is integrated into the system to enhance oxygen reduction reaction in the cathode chamber. However, the water production (desalination rate) is low compared to conventional technologies (i.e., reverse osmosis and/or electrodialysis), as biocathodes provide low current generation to sustain the desalination process. In this sense, more research efforts on this topic are necessary to address this bottleneck. Thus, this study provides analysis, from the electrochemical point of view, on the cathode performance of an algae-assisted microbial desalination cell (MDC) using Chlorella vulgaris. Firstly, the system was run with a pure culture of Chlorella vulgaris suspension in the cathode under conditions of an abiotic anode to assess the cathodic behavior (i.e., cathode polarization curves in light-dark conditions and oxygen depletion). Secondly, Geobacter sulfurreducens was inoculated in the anode compartment of the MDC, and the desalination cycle was carried out. The results showed that microalgae could generate an average of 9–11.5 mg/L of dissolved oxygen during the light phase, providing enough dissolved oxygen to drive the migration of ions (i.e., desalination) in the MDC system. Moreover, during the dark phase, a residual concentration of oxygen (ca. 5.5–8 mg/L) was measured, indicating that oxygen was not wholly depleted under our experimental conditions. Interestingly, the oxygen concentration was restored (after complete depletion of dissolved oxygen by flushing with N2) as soon as microalgae were exposed to the light phase again. After a 31 h desalination cycle, the cell generated a current density of 0.12 mA/cm2 at an efficiency of 60.15%, 77.37% salt was removed at a nominal desalination rate of 0.63 L/m2/h, coulombic efficiency was 9%, and 0.11 kWh/m3 of electric power was generated. The microalgae-assisted biocathode has an advantage over the air diffusion and bubbling as it can self-sustain a steady and higher concentration of oxygen, cost-effectively regenerate or recover from loss and sustainably retain the system’s performance under naturally occurring conditions. Thus, our study provides insights into implementing the algae-assisted cathode for sustainable desalination using MDC technology and subsequent optimization.
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Bonnanfant M, Marec H, Jesus B, Mouget JL, Pruvost J. Investigation of the photosynthetic response of Chlorella vulgaris to light changes in a torus-shape photobioreactor. Appl Microbiol Biotechnol 2021; 105:8689-8701. [PMID: 34724082 DOI: 10.1007/s00253-021-11636-w] [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: 04/22/2021] [Revised: 09/14/2021] [Accepted: 10/05/2021] [Indexed: 10/20/2022]
Abstract
An efficient use of light is essential to achieve good performances in microalgae cultivation systems. This can be challenging particularly under solar conditions where light is highly dynamic (e.g., day/night cycles, rapid changes in wind and weather conditions). Microalgae display different mechanisms to optimize light use efficiency. In the short term, when high light is encountered, several processes of photoprotection can be involved to avoid cell damages (e.g., xanthophyll cycle). In the long term, when cells are exposed to a different light intensity, pigment content changes, i.e., photoacclimation. The purpose of this study is to investigate the photosynthetic response of Chlorella vulgaris cultures grown in closed lab-scale, torus-shape photobioreactor under well-controlled light conditions, namely, constant and dynamic light transitions. Experiments were conducted in continuous mode with detailed characterization of the light attenuation conditions for each condition, as represented by the mean rate of photon absorption (MRPA), so as to characterize the time responses of the photosynthetic cells toward light changes. This enables to observe short-term and long-term responses with their own characteristic times. The mechanisms involved were found to be different between increasing and decreasing light transitions. Furthermore the MRPA was found a valuable parameter to relate the effect of light to biological responses (i.e., pigment changes) under constant light and dynamic light conditions.Key points• MRPA proved valuable to relate C. vulgaris responses to light changes.• A linear evolution was found between pigment content and MRPA in continuous light.• A rising PFD step induced fast protection and acclimation mechanisms.
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Affiliation(s)
- M Bonnanfant
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France.,Mer-Molécules-Santé (MMS), EA 2160, Le Mans Université, Le Mans Cedex 9, France
| | - H Marec
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France
| | - B Jesus
- Mer-Molécules-Santé (MMS), EA2160, Faculté Des Sciences, Université de Nantes, Nantes, France
| | - J-L Mouget
- Mer-Molécules-Santé (MMS), EA 2160, Le Mans Université, Le Mans Cedex 9, France
| | - J Pruvost
- GEPEA, UMR 6144, Oniris, CNRS, Université de Nantes, 44600, Saint-Nazaire, France.
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Carvalho VCF, Kessler M, Fradinho JC, Oehmen A, Reis MAM. Achieving nitrogen and phosphorus removal at low C/N ratios without aeration through a novel phototrophic process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 793:148501. [PMID: 34171805 DOI: 10.1016/j.scitotenv.2021.148501] [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: 04/23/2021] [Revised: 06/12/2021] [Accepted: 06/13/2021] [Indexed: 06/13/2023]
Abstract
Conventional wastewater treatment technologies for biological nutrient removal (BNR) are highly dependent on aeration for oxygen supply, which represents a major operational cost of the process. Recently, phototrophic enhanced biological phosphorus removal (photo-EBPR) has been suggested as an alternative system for phosphorus removal, based on a consortium of photosynthetic microorganisms and chemotrophic bacteria, eliminating the need for costly aeration. However, wastewater treatment plants must couple nitrogen and phosphorus removal to achieve discharge limits. For this reason, a new microalgae-bacterial based system for phosphorus and nitrogen removal is proposed in this work. The photo-BNR system studied here consists of a sequencing batch reactor operated with dark anaerobic, light aerobic, dark anoxic and idle periods, to allow both N and P removal. Results of the study show that the photo-BNR system was able to remove 100% of the 40 mg N/L of ammonia fed to the reactor and 94 ± 3% of the total nitrogen (Influent COD:N ratio of 300:40, similar to domestic wastewater). Moreover, an average of 25 ± 9.2 mg P/L was simultaneously removed in the photo-BNR tests, representing the P removal capacity of this system, which exceeds the level of P removal required from typical domestic wastewater. Full ammonia removal was achieved during the light phase, with 67 ± 5% of this ammonia being assimilated by the microbial culture and the remaining 33 ± 5% being converted into nitrate. The assimilated P corresponded to 2.8 ± 0.23 mg P/L, which only represented, approximately, 1/9 of the P removal capacity of the system. Half of the nitrified ammonia was subsequently denitrified during the dark anoxic phase (50 ± 24%). Overall, the photo-BNR system represents the first treatment alternative for N and P from domestic wastewater with no need of mechanical aeration or supplemental carbon addition, representing an alternative low-energy technology of interest.
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Affiliation(s)
- V C F Carvalho
- UCIBIO-REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - M Kessler
- UCIBIO-REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - J C Fradinho
- UCIBIO-REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
| | - A Oehmen
- School of Chemical Engineering, University of Queensland, Brisbane, QLD 4072, Australia
| | - M A M Reis
- UCIBIO-REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
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Improvements in Conventional Modeling Practices for Effective Simulation and Understanding of Microalgal Growth in Photobioreactors: an Experimental Study. BIOTECHNOL BIOPROC E 2021. [DOI: 10.1007/s12257-020-0293-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Charria-Girón E, Amazo V, De Angulo D, Hidalgo E, Villegas-Torres MF, Baganz F, Caicedo Ortega NH. Strategy for Managing Industrial Anaerobic Sludge through the Heterotrophic Cultivation of Chlorella sorokiniana: Effect of Iron Addition on Biomass and Lipid Production. Bioengineering (Basel) 2021; 8:bioengineering8060082. [PMID: 34200526 PMCID: PMC8228024 DOI: 10.3390/bioengineering8060082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/31/2021] [Accepted: 06/06/2021] [Indexed: 11/16/2022] Open
Abstract
Microalgae provides an alternative for the valorization of industrial by-products, in which the nutritional content varies substantially and directly affects microalgae system performance. Herein, the heterotrophic cultivation of Chlorella sorokiniana was systematically studied, allowing us to detect a nutritional deficiency other than the carbon source through assessing the oxygen transfer rate for glucose or acetate fermentation. Consequently, a mathematical model of the iron co-limiting effect on heterotrophic microalgae was developed by exploring its ability to regulate the specific growth rate and yield. For instance, higher values of the specific growth rate (0.17 h-1) compared with those reported for the heterotrophic culture of Chlorella were obtained due to iron supplementation. Therefore, anaerobic sludge from an industrial wastewater treatment plant (a baker's yeast company) was pretreated to obtain an extract as a media supplement for C. sorokiniana. According to the proposed model, the sludge extract allowed us to supplement iron values close to the growth activation concentration (KFe ~12 mg L-1). Therefore, a fed-batch strategy was evaluated on nitrogen-deprived cultures supplemented with the sludge extract to promote biomass formation and fatty acid synthesis. Our findings reveal that nitrogen and iron in sludge extract can supplement heterotrophic cultures of Chlorella and provide an alternative for the valorization of industrial anaerobic sludge.
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Affiliation(s)
- Esteban Charria-Girón
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Vanessa Amazo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Daniela De Angulo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - Eliana Hidalgo
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
| | - María Francisca Villegas-Torres
- Departamento de Ciencias Químicas, Facultad de Ciencias Naturales, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia;
- Centro BioInc, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia
| | - Frank Baganz
- Department of Biochemical Engineering, University College London, Gordon Street, London WC1H 0AH, UK;
| | - Nelson. H. Caicedo Ortega
- Departamento de Ingeniería Bioquímica, Facultad de Ingeniería, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia; (E.C.-G.); (V.A.); (D.D.A.); (E.H.)
- Centro BioInc, Universidad Icesi, Calle 18 No. 122–135, Cali 760031, Colombia
- Correspondence: ; Tel.: +57-318-754-8041
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Masojídek J, Ranglová K, Rearte TA, Celis Plá PS, Torzillo G, Benavides AMS, Neori A, Gómez C, Álvarez-Gómez F, Lukeš M, Caporgno MP, Abdala R, Miazek K, Massocato TF, da Silva JC, Atzmüller R, Al Mahrouqui H, Estrella FS, Figueroa FL. Changes in photosynthesis, growth and biomass composition in outdoor Chlorella g120 culture during the metabolic shift from heterotrophic to phototrophic cultivation regime. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102303] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Senatore V, Buonerba A, Zarra T, Oliva G, Belgiorno V, Boguniewicz-Zablocka J, Naddeo V. Innovative membrane photobioreactor for sustainable CO 2 capture and utilization. CHEMOSPHERE 2021; 273:129682. [PMID: 33515958 DOI: 10.1016/j.chemosphere.2021.129682] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Revised: 01/07/2021] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
The rising of greenhouse-gas emissions (GHG), during the last 200 years, is associated to the well known global warming phenomena. One of the main sources of CO2-equivalent GHGs emissions are the environmental protection plants accounting for 1.57% of the global emissions and thus sustainable and effective technologies for their mitigation are strongly needed. The current paper presents and discusses the assessment of an innovative membrane photo-bioreactor (MPBR) whose aim was the promotion of CO2 capture from conveyed flows, such as those from wastewater treatment plants (WWTPs), landfill and composting plants, for production and energy valorisation of algal biomass. Chlorella vulgaris microalgae strain was selected as photosynthetic platform for the abovementioned purposes. The influence of various operating parameters has been explored, including the photosynthetic photon flux densities (PPFD) (60 and 120 μmol m-2 s-1), liquid/gas ratio (L/G = 5, 10 or 15) and CO2 concentration (5, 10 and 15%) in order to investigated their effects on carbon capture effectiveness and biomass production. The results demonstrated that the increasing of PPFD significantly enhanced the biomass production in terms of biomass productivity (P) and total dry weight (DW). The highest biomass concentration of 1.01 g L-1 was achieved at PPFD of 120 μmol m-2 s-1 with a L/G of 15. Under the aforementioned conditions, carbon dioxide removal efficiency (RE) reached values up to 80%. In addition, the novel MPBR equipped with an innovative self-forming dynamic membrane (SFDM) showed a simultaneous biomass harvesting rate of 41 g m-2 h-1.
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Affiliation(s)
- Vincenzo Senatore
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy.
| | - Antonio Buonerba
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy; Inter-University Centre for Prediction and Prevention of Relevant Hazards (Centro Universitario per La Previsione e Prevenzione Grandi Rischi, C.U.G.RI.), Via Giovanni Paolo II, Fisciano, SA, Italy.
| | - Tiziano Zarra
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy; Inter-University Centre for Prediction and Prevention of Relevant Hazards (Centro Universitario per La Previsione e Prevenzione Grandi Rischi, C.U.G.RI.), Via Giovanni Paolo II, Fisciano, SA, Italy.
| | - Giuseppina Oliva
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy.
| | - Vincenzo Belgiorno
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy.
| | - Joanna Boguniewicz-Zablocka
- Department of Thermal Engineering and Industrial Facilities, Faculty of Mechanical Engineering, Opole University of Technology, Poland.
| | - Vincenzo Naddeo
- Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084, Fisciano, SA, Italy.
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Tan XB, Wan XP, Yang LB, Wang X, Meng J, Jiang MJ, Pi HJ. Nutrients recycling and biomass production from Chlorella pyrenoidosa culture using anaerobic food processing wastewater in a pilot-scale tubular photobioreactor. CHEMOSPHERE 2021; 270:129459. [PMID: 33388504 DOI: 10.1016/j.chemosphere.2020.129459] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 11/08/2020] [Accepted: 12/24/2020] [Indexed: 05/05/2023]
Abstract
Microalgae cultivation in anaerobic food wastewater was a feasible way for high biomass production and nutrients recycling. In this study, Chlorella pyrenoidosa culture on anaerobic food wastewater was processed outdoors using a pilot-scale tubular photobioreactor. The microalgae showed rapid growth in different seasons, achieving high biomass production of 1.83-2.10 g L-1 and specific growth rate of 0.73-1.59 d-1. The biological contamination and dissolved oxygen were controlled at suitable levels for algal growth in the tubular photobioreactor. Lipids content in harvested biomass was 8.1-15.3% of dried weight, and the analysis in fatty acids revealed high quality with long carbon chain length and high saturation. Additionally, algal growth achieved effective pollutants purification from wastewater, removing 42.3-53.8% of CODCr, 82.6-88.7% of TN and 59.7-67.6% of TP. This study gave a successful application for scaled-up microalgae culture in anaerobic food processing wastewater for biodiesel production and wastewater purification.
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Affiliation(s)
- Xiao-Bo Tan
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China
| | - Xi-Ping Wan
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China
| | - Li-Bin Yang
- College of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, China
| | - Xin Wang
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China
| | - Jing Meng
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China
| | - Ming-Juan Jiang
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China
| | - He-Jie Pi
- College of Urban and Environment Sciences, Hunan Provincial Key Laboratory of Comprehensive Utilization of Agricultural and Animal Husbandry Waste Resources, Hunan Key Laboratory of Water Safety Discharge in Urban and Its Resource Utilization, Hunan University of Technology, 88 Taishan Road, Zhuzhou City, Hunan Province, 412007, China.
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Rearte TA, Celis-Plá PS, Neori A, Masojídek J, Torzillo G, Gómez-Serrano C, Silva Benavides AM, Álvarez-Gómez F, Abdala-Díaz R, Ranglová K, Caporgno M, Massocato TF, da Silva JC, Al Mahrouqui H, Atzmüller R, Figueroa FL. Photosynthetic performance of Chlorella vulgaris R117 mass culture is moderated by diurnal oxygen gradients in an outdoor thin layer cascade. ALGAL RES 2021. [DOI: 10.1016/j.algal.2020.102176] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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40
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Lai YS, Eustance E, Shesh T, Rittmann BE. Enhanced carbon-transfer and -utilization efficiencies achieved using membrane carbonation with gas sources having a range of CO2 concentrations. ALGAL RES 2020. [DOI: 10.1016/j.algal.2020.102098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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41
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Modeling the oxygen inhibition in microalgae: An experimental approach based on photorespirometry. N Biotechnol 2020; 59:26-32. [PMID: 32683047 DOI: 10.1016/j.nbt.2020.06.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 06/15/2020] [Accepted: 06/15/2020] [Indexed: 11/23/2022]
Abstract
Microalgae cultivation has been the object of relevant interest for many industrial applications. Where high purity of the biomass/product is required, closed photobioreactors (PBRs) appear to be the best technological solution. However, as well as cost, the major drawback of closed systems is oxygen accumulation, which is well known to be responsible for growth inhibition. Only a few quantitative approaches have attempted to describe and model oxygen inhibition, which is the result of different biological mechanisms. Here, we have applied a photorespirometric protocol to assess and quantify the effect of high oxygen concentration on photosynthetic production rate. In particular, the effects of light intensity and biomass concentration were assessed, resulting in different maximum inhibitory oxygen concentrations. Literature models available were found not to fully represent experimental data as a function of concentration and light. Accordingly, a new formulation was proposed and validated to describe the photosynthetic rate as a function of external oxygen concentration.
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Dasan YK, Lam MK, Yusup S, Lim JW, Show PL, Tan IS, Lee KT. Cultivation of Chlorella vulgaris using sequential-flow bubble column photobioreactor: A stress-inducing strategy for lipid accumulation and carbon dioxide fixation. J CO2 UTIL 2020. [DOI: 10.1016/j.jcou.2020.101226] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Nguyen TTD, Nguyen TT, An Binh Q, Bui XT, Ngo HH, Vo HNP, Andrew Lin KY, Vo TDH, Guo W, Lin C, Breider F. Co-culture of microalgae-activated sludge for wastewater treatment and biomass production: Exploring their role under different inoculation ratios. BIORESOURCE TECHNOLOGY 2020; 314:123754. [PMID: 32650264 DOI: 10.1016/j.biortech.2020.123754] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/23/2020] [Accepted: 06/25/2020] [Indexed: 05/23/2023]
Abstract
In this study, mixed culture (microalgae:activated sludge) of a photobioreactor (PBR) were investigated at different inoculation ratios (1:0, 9:1, 3:1, 1:1, 0:1 wt/wt). This work was not only to determine the optimal ratio for pollutant remediation and biomass production but also to explore the role of microorganisms in the co-culture system. The results showed high total biomass concentrations were obtained from 1:0 and 3:1 ratio being values of 1.06, 1.12 g L-1, respectively. Microalgae played a dominant role in nitrogen removal via biological assimilation while activated sludge was responsible for improving COD removal. Compared with the single culture of microalgae, the symbiosis between microalgae and bacteria occurred at 3:1 and 1:1 ratio facilitated a higher COD removal by 37.5-45.7 %. In general, combined assessment based on treatment performance and biomass productivity facilitated to select an optimal ratio of 3:1 for the operation of the co-culture PBR.
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Affiliation(s)
- Thi-Thuy-Duong Nguyen
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam
| | - Thanh-Tin Nguyen
- Institute of Research and Development, Duy Tan University, 03 Quang Trung, Da Nang 550000, Viet Nam
| | - Quach An Binh
- Faculty of Applied Sciences-Health, Dong Nai Technology University, Dong Nai 810000, Viet Nam
| | - Xuan-Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Vietnam National University Ho Chi Minh (VNU-HCM), Linh Trung Ward, Thu Duc District, Ho Chi Minh City 700000, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam.
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Hoang Nhat Phong Vo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Kun-Yi Andrew Lin
- Department of Environmental Engineering & Innovation and Development Center of Sustainable Agriculture & Research Center of Sustainable Energy and Nanotechnology, National Chung Hsing University, 250 Kuo-Kuang Road, Taichung, Taiwan
| | - Thi-Dieu-Hien Vo
- Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia
| | - Chitsan Lin
- National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - Florian Breider
- ENAC, IIE, Central Environmental Laboratory (CEL), Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 2, 1015 Lausanne, Switzerland
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44
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Kishi M, Nagatsuka K, Toda T. Effect of Membrane Hydrophobicity and Thickness on Energy-Efficient Dissolved Oxygen Removal From Algal Culture. Front Bioeng Biotechnol 2020; 8:978. [PMID: 32974310 PMCID: PMC7471630 DOI: 10.3389/fbioe.2020.00978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 07/27/2020] [Indexed: 11/13/2022] Open
Abstract
Removal of dissolved oxygen from algal photobioreactors is essential for high productivity in mass cultivation. Gas-permeating photobioreactor that uses hydrophobic membranes to permeate dissolved oxygen (pervaporation) from its body itself is an energy-efficient option for oxygen removal. This study comparably evaluated the characteristics of various commercial membranes and determined the criteria for the selection of suitable ones for the gas-permeating photobioreactors. It was found that oxygen permeability is limited not by that in the membrane but in the liquid boundary layer. Membrane thickness had a negative effect on membrane oxygen permeability, but the effect was as minor as less than 3% compared with the liquid boundary layer. Due to this characteristic, the lamination of non-woven fabric with the microporous film did not significantly decrease the overall oxygen transfer coefficient. The permeability in the liquid boundary layer had a significantly positive relationship with the hydrophobicity. The highest overall oxygen transfer coefficients in the water-to-air and water-to-water oxygen removal tests were 2.1 ± 0.03 × 10–5 and 1.39 ± 0.09 × 10–5 m s–1, respectively. These values were considered effective in the dissolved oxygen removal from high-density algal culture to prevent oxygen inhibition. Furthermore, hydrophobicity was found to have a significant relationship also with water entry pressure, which needs to be high to avoid culture liquid leakage. Therefore, these results suggested that a microporous membrane with strong hydrophobicity laminated with non-woven fabric would be suitable characteristics for gas-permeating photobioreactor.
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Affiliation(s)
- Masatoshi Kishi
- Faculty of Science and Engineering, Soka University, Tokyo, Japan.,Plankton Eco-Engineering Research Center, Soka University, Tokyo, Japan
| | - Kenta Nagatsuka
- Faculty of Science and Engineering, Soka University, Tokyo, Japan
| | - Tatsuki Toda
- Plankton Eco-Engineering Research Center, Soka University, Tokyo, Japan.,Graduate School of Science and Engineering, Soka University, Tokyo, Japan
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