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Li X, Chen T, Ren Q, Lu J, Cao S, Liu C, Li Y. Phages in sludge from the A/O wastewater treatment process play an important role in the transmission of ARGs. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:172111. [PMID: 38565354 DOI: 10.1016/j.scitotenv.2024.172111] [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: 12/28/2023] [Revised: 02/24/2024] [Accepted: 03/28/2024] [Indexed: 04/04/2024]
Abstract
Phages can influence the horizontal gene transfer (HGT) of antibiotic resistance genes (ARGs) through transduction, but their profiles and effects on the transmission of ARGs are unclear, especially in complex swine sludge. In this study, we investigated the characterization of phage and ARG profiles in sludge generated from anoxic/oxic (A/O) wastewater treatment processes on swine farms using metagenomes and viromes. The results demonstrated that 205-221 subtypes of ARGs could be identified in swine sludge, among which sul1, tet(M), and floR were the dominant ARGs, indicating that sludge is an important reservoir of ARGs, especially in sludge (S) tanks. The greater abundance of mobile genetic elements (MGEs) in the S tank could significantly contribute to the greater abundance of ARGs there compared to the anoxic (A) and oxic (O) tanks (P < 0.05). However, when we compared the abundances of ARGs and MGEs in the A and O tanks, we observed opposite significant differences (P < 0.05), suggesting that MGEs are not the only factor influencing the abundance of ARGs. The high proportion of lysogenic phages in sludge from the S tank can also have a major impact on the ARG profile. Siphoviridae, Myoviridae, and Podoviridae were the dominant phage families in sludge, and a network diagram of bacteria-ARG-phages revealed that dominant phages and bacteria acted simultaneously as potential hosts for ARGs, which may have led to phage-mediated HGT of ARGs. Therefore, the risk of phage-mediated HGT of ARGs cannot be overlooked.
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Affiliation(s)
- Xiaoting Li
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Tao Chen
- College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
| | - Qinghai Ren
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Jianbiao Lu
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Shengliang Cao
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Cheng Liu
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China
| | - Yubao Li
- Phage Research Center, Liaocheng University, Liaocheng, Shandong 252000, China.
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Lin Z, Tan J, Xiong Z, Fu Z, Chen J, Xie T, Zheng J, Zhang Y, Li P. Regulation of the autochthonous microbial community in excess sludge for the bioconversion of carbon dioxide to acetate without exogenic hydrogen. BIORESOURCE TECHNOLOGY 2023; 378:129011. [PMID: 37011841 DOI: 10.1016/j.biortech.2023.129011] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/26/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
The autochthonous microbial community from excess sludge was regulated for enhanced conversion of CO2 to acetate without exogenic H2. It was interesting that the acetate-fed system exhibited a surprising performance to regulate the microbial community for a high acetate yield and selectivity. As a result, some hydrogen-producing bacteria (e.g., Proteiniborus) and acetogenic bacteria with the ability of CO2 reduction were enriched by acetate feeding, 2-bromoethanesulfonate (BES) addition and CO2 stress. When the selected microbial community was applied to convert CO2, the accumulation of acetate was positively correlated to the concentration of yeast extract. Finally, the acetate yield reached up to 67.24 mM with a high product selectivity of 84 % in the presence of yeast extract (2 g/L) and sufficient CO2 in semi-continuous culture for 10 days. This work should help get new insights into the regulation of microbial community for the efficient acetate production from CO2.
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Affiliation(s)
- Zhiwen Lin
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Jinan Tan
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Zhihan Xiong
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Zisen Fu
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Jing Chen
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Tonghui Xie
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Jia Zheng
- Key Laboratory of Wuliangye-flavor Liquor Solid-state Fermentation, China National Light Industry, Yibin, Sichuan 644007, PR China
| | - Yongkui Zhang
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China
| | - Panyu Li
- Department of Pharmaceutical & Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, PR China.
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3
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Use of Microbial Fuel Cells for the Treatment of Residue Effluents Discharged from an Anaerobic Digester Treating Food Wastes. Microorganisms 2023; 11:microorganisms11030598. [PMID: 36985172 PMCID: PMC10059938 DOI: 10.3390/microorganisms11030598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 02/24/2023] [Accepted: 02/24/2023] [Indexed: 03/02/2023] Open
Abstract
One of practical challenges in anaerobic-digestion (AD) technology is the cost-effective treatment of residue effluents containing high concentrations of organics, nitrogen and phosphorus (CNP). In order to evaluate the utility of microbial fuel cells (MFCs) for treating anaerobic-digester effluents (ADEs) and generating power from them, laboratory-scale single-chamber MFCs were filled with ADE obtained from a commercial AD plant treating food wastes and thereafter operated by routinely supplying ADE at different hydraulic residence times (HRTs, 5 to 20 days). It is shown that MFCs were able to reduce not only organics in ADE but also nitrogen and phosphorus. For instance, data demonstrated that over 50% of CNP was removed in MFCs operated at an HRT of 10 days, at which the maximum power density reached over 200 mW m−2 (based on the projected area of anode). Metabarcoding of 16S rRNA genes showed that some bacteria were specifically enriched in anode biofilms, suggesting their involvement in power generation. Our study suggests that MFCs are applicable to reducing CNP in ADEs at reasonable rates, and provides subsequent work with fundamental data useful for setting targets for further developments.
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Sonawane JM, Mahadevan R, Pandey A, Greener J. Recent progress in microbial fuel cells using substrates from diverse sources. Heliyon 2022; 8:e12353. [PMID: 36582703 PMCID: PMC9792797 DOI: 10.1016/j.heliyon.2022.e12353] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/09/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Increasing untreated environmental outputs from industry and the rising human population have increased the burden of wastewater and other waste streams on the environment. The most prevalent wastewater treatment methods include the activated sludge process, which requires aeration and is, therefore, energy and cost-intensive. The current trend towards a circular economy facilitates the recovery of waste materials as a resource. Along with the amount, the complexity of wastewater is increasing day by day. Therefore, wastewater treatment processes must be transformed into cost-effective and sustainable methods. Microbial fuel cells (MFCs) use electroactive microbes to extract chemical energy from waste organic molecules to generate electricity via waste treatment. This review focuses use of MFCs as an energy converter using wastewater from various sources. The different substrate sources that are evaluated include industrial, agricultural, domestic, and pharmaceutical types. The article also highlights the effect of operational parameters such as organic load, pH, current, and concentration on the MFC output. The article also covers MFC functioning with respect to the substrate, and the associated performance parameters, such as power generation and wastewater treatment matrices, are given. The review also illustrates the success stories of various MFC configurations. We emphasize the significant measures required to fill in the gaps related to the effect of substrate type on different MFC configurations, identification of microbes for use as biocatalysts, and development of biocathodes for the further improvement of the system. Finally, we shortlisted the best performing substrates based on the maximum current and power, Coulombic efficiency, and chemical oxygen demand removal upon the treatment of substrates in MFCs. This information will guide industries that wish to use MFC technology to treat generated effluent from various processes.
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Affiliation(s)
- Jayesh M. Sonawane
- Department of Chemical Engineering and Applied Chemistry, University of Toronto M5S 3E5, Canada
- Département de Chimie, Faculté des Sciences et de génie, Université Laval, Québec City, QC, Canada
- Corresponding author.
| | - Radhakrishnan Mahadevan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto M5S 3E5, Canada
| | - Ashok Pandey
- Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow, 226 001, India
- Centre for Energy and Environmental Sustainability, Lucknow, 226 029, India
| | - Jesse Greener
- Département de Chimie, Faculté des Sciences et de génie, Université Laval, Québec City, QC, Canada
- CHU de Québec, Centre de recherche, Université Laval, 10 rue de l'Espinay, Québec, QC, Canada
- Corresponding author.
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5
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Organic Waste Substrates for Bioenergy Production via Microbial Fuel Cells: A Key Point Review. ENERGIES 2022. [DOI: 10.3390/en15155616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
High-energy consumption globally has raised questions about the low environmentally friendly and high-cost processes used until now for energy production. Microbial fuel cells (MFCs) may support alternative more economically and environmentally favorable ways of bioenergy production based on their advantage of using waste. MFCs work as bio-electrochemical devices that consume organic substrates in order for the electrogenic bacteria and/or enzyme cultures to produce electricity and simultaneously lower the environmental hazardous value of waste such as COD. The utilization of organic waste as fuels in MFCs has opened a new research path for testing a variety of by-products from several industry sectors. This review presents several organic waste substrates that can be employed as fuels in MFCs for bioenergy generation and the effect of their usage on power density, COD (chemical oxygen demand) removal, and Coulombic efficiency enhancement. Moreover, a demonstration and comparison of the different types of mixed waste regarding their efficiency for energy generation via MFCs are presented. Future perspectives for manufacturing and cost analysis plans can support scale-up processes fulfilling waste-treatment efficiency and energy-output densities.
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Wu H, Cui M, Yang X, Liu Y, Wang J, Zhang L, Zhan G, Zhao Y. Visual signal sensor coupling to nitrification for sustainable monitoring of trichloroacetaldehyde and the response mechanisms. Bioelectrochemistry 2022; 146:108142. [DOI: 10.1016/j.bioelechem.2022.108142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Revised: 04/16/2022] [Accepted: 04/20/2022] [Indexed: 11/02/2022]
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Microbial Fuel Cell as a Bioelectrochemical Sensor of Nitrite Ions. Processes (Basel) 2021. [DOI: 10.3390/pr9081330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The deteriorating environmental quality requires a rapid in situ real-time monitoring of toxic compounds in environment including water and wastewater. One of the most toxic nitrogen-containing ions is nitrite ion, therefore, it is particularly important to ensure that nitrite ions are completely absent in surface and ground waters as well as in wastewater or, at least, their concentration does not exceed permissible levels. However, no selective ion electrode, which would enable continuous measurement of nitrite ion concentration in wastewater by bioelectrochemical sensor, is available. Microbial fuel cell (MFC)-based biosensor offers a sustainable low-cost alternative to the monitoring by periodic sampling for laboratory testing. It has been determined, that at low (0.01–0.1 mg·L−1) and moderate (1.0–10 mg·L−1) concentration of nitrite ions in anolyte-model wastewater, the voltage drop in MFC linearly depends on the logarithm of nitrite ion concentration of proving the potential of the application of MFC-based biosensor for the quantitative monitoring of nitrite ion concentration in wastewater and other surface water. Higher concentrations (100–1000 mg·L−1) of nitrite ions in anolyte-model wastewater could not be accurately quantified due to a significant drop in MFC voltage. In this case MFC can potentially serve as a bioelectrochemical early warning device for extremely high nitrite pollution.
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Cai J, Qaisar M, Ding A, Zhang J, Xing Y, Li Q. Insights into microbial community in microbial fuel cells simultaneously treating sulfide and nitrate under external resistance. Biodegradation 2021; 32:73-85. [PMID: 33442823 DOI: 10.1007/s10532-021-09926-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/16/2020] [Accepted: 01/06/2021] [Indexed: 11/25/2022]
Abstract
The effect of electricity, induced by external resistance, on microbial community performance is investigated in Microbial Fuel Cells (MFCs) involved in simultaneous biotransformation of sulfide and nitrate. In the experiment, three MFCs were operated under different external resistances (100 Ω, 1000 Ω and 10,000 Ω), while one MFC was operated with open circuit as control. All MFCs demonstrate good capacity for simultaneous sulfide and nitrate biotransformation regardless of external resistance. MFCs present similar voltage profile; however, the output voltage has positive relationship with external resistance, and the MFC1 with lowest external resistance (100 Ω) generated highest power density. High-throughput sequencing confirms that taxonomic distribution of suspended sludge in anode chamber encompass phylum level to genus level, while the results of principal component analysis (PCA) suggest that microbial communities are varied with external resistance, which external resistance caused the change of electricity generation and substrate removal at the same, and then leads to the change of microbial communities. However, based on Pearson correlation analyses, no strong correlation is evident between community diversity indices (ACE index, Chao index, Shannon index and Simpson index) and the electricity (final voltage and current density). It is inferred that the performance of electricity did not significantly affect the diversity of microbial communities in MFCs biotransforming sulfide and nitrate simultaneously.
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Affiliation(s)
- Jing Cai
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China.
| | - Mahmood Qaisar
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Islamabad, Pakistan
| | - Aqiang Ding
- Department of Environmental Science, College of Resource and Environmental Science, Chongqing University, Chongqing, China
| | - Jiqiang Zhang
- College of Biological and Environmental Engineering, Binzhou University, Binzhou, China
| | - Yajuan Xing
- College of Geomatics and Municipal Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou, China
| | - Qiangbiao Li
- College of Environmental Science and Engineering, Zhejiang Gongshang University, No.18 Xuezheng Street, Hangzhou, Zhejiang Province, China
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9
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Psychrophilic Full Scale Tubular Digester Operating over Eight Years: Complete Performance Evaluation and Microbiological Population. ENERGIES 2020. [DOI: 10.3390/en14010151] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Most biogas plants in the world run under psychrophilic conditions and are operated by small and medium farmers. There is a gap of knowledge on the performance of these systems after several years of operation. The aim of this research is to provide a complete evaluation of a psychrophilic, low-cost, tubular digester operated for eight years. The thermal performance was monitored for 50 days, and parameters such as pH, total volatile fatty acid (tVFA), chemical oxygen demand (COD) and volatile solids (VS) were measured every week for the influent and effluent. The digester operated at a stabilized slurry temperature of around 17.7 °C, with a mean organic load rate (OLR) equal to 0.52 kg VS/m3digester *d and an estimated hydraulic retention time (HRT) of 25 days. The VS reduction in the digester was around 77.58% and the COD reduction was 67 ± 3%, with a mean value for the effluent of 3.31 ± 1.20 g COD/Lt, while the tVFA decreased by 83.6 ± 15.5% and the presence of coliforms decreased 10.5%. A BioMethane potential test (BMP) for the influent and effluent showed that the digester reached a specific methane production of 0.40 Nm3CH4/kg VS and a 0.21 Nm3CH4/m3digester d with 63.1% CH4 in the biogas. These results, together with a microbiological analysis, show stabilized anaerobic digestion and a biogas production that was higher than expected for the psychrophilic range and the short HRT; this may have been due to the presence of an anaerobic digestion microorganism consortium which was extremely well-adapted to psychrophilic conditions over the eight-year study period.
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Khandelwal A, Chhabra M, Yadav P. Performance evaluation of algae assisted microbial fuel cell under outdoor conditions. BIORESOURCE TECHNOLOGY 2020; 310:123418. [PMID: 32353768 DOI: 10.1016/j.biortech.2020.123418] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/16/2020] [Accepted: 04/19/2020] [Indexed: 06/11/2023]
Abstract
This study reports for the first time an operation of an outdoor algae assisted Microbial Fuel Cell (MFC). The MFC (10 L) comprised of low-cost materials like rock phosphate blended clayware & low-density polyethylene bags as anodic & cathodic chamber respectively. Algae biomass after lipid extraction at 2 g/l served as electron donor at the anode. Chlorella vulgaris at cathode provided oxygen as electron acceptor and served as lipid source. The MFCs performed well in all aspects namely energy recovery, algae productivity, and cost of operation. The 5% RP-MFCs gave 0.307 kg/m3d algal productivity, 0.09 kg/m3d lipid productivity, and 11.5318 kWh/m3 of net energy recovery (NER). Rock phosphate served as a slow and constant source of phosphorus supporting algae growth. Proteobacteria (45.14%) were the dominant phyla while Alicyliphilus (5.46%) and Dechloromonas (4.74%) were the dominant genera at the anode. The estimated cost of the system was $11.225 only.
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Affiliation(s)
- Amitap Khandelwal
- Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, Rajasthan 342037, India
| | - Meenu Chhabra
- Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, Rajasthan 342037, India.
| | - Pallavee Yadav
- Environmental Biotechnology Laboratory, Department of Bioscience and Bioengineering, Indian Institute of Technology Jodhpur (IIT J), Jodhpur, Rajasthan 342037, India
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11
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Guo Y, Wang J, Shinde S, Wang X, Li Y, Dai Y, Ren J, Zhang P, Liu X. Simultaneous wastewater treatment and energy harvesting in microbial fuel cells: an update on the biocatalysts. RSC Adv 2020; 10:25874-25887. [PMID: 35518611 PMCID: PMC9055303 DOI: 10.1039/d0ra05234e] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 07/03/2020] [Indexed: 01/17/2023] Open
Abstract
The development of microbial fuel cell (MFC) makes it possible to generate clean electricity as well as remove pollutants from wastewater. Extensive studies on MFC have focused on structural design and performance optimization, and tremendous advances have been made in these fields. However, there is still a lack of systematic analysis on biocatalysts used in MFCs, especially when it comes to pollutant removal and simultaneous energy recovery. In this review, we aim to provide an update on MFC-based wastewater treatment and energy harvesting research, and analyze various biocatalysts used in MFCs and their underlying mechanisms in pollutant removal as well as energy recovery from wastewater. Lastly, we highlight key future research areas that will further our understanding in improving MFC performance for simultaneous wastewater treatment and sustainable energy harvesting.
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Affiliation(s)
- Yajing Guo
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Jiao Wang
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Shrameeta Shinde
- Department of Microbiology, Miami University Oxford OH 45056 USA
| | - Xin Wang
- Department of Microbiology, Miami University Oxford OH 45056 USA
| | - Yang Li
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Yexin Dai
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Jun Ren
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
| | - Pingping Zhang
- College of Food Science and Engineering, Tianjin Agricultural University Tianjin 300384 PR China
| | - Xianhua Liu
- Tianjin Key Lab. of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University Tianjin 300354 PR China
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Microbiological evaluation of nano-Fe3O4/GO enhanced the micro-aerobic activate sludge system for the treatment of mid-stage pulping effluent. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01314-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Moungmoon T, Chaichana C, Pumas C, Pathom-Aree W, Ruangrit K, Pekkoh J. Quantitative analysis of methane and glycolate production from microalgae using undiluted wastewater obtained from chicken-manure biogas digester. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 714:136577. [PMID: 31982736 DOI: 10.1016/j.scitotenv.2020.136577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 01/03/2020] [Accepted: 01/06/2020] [Indexed: 06/10/2023]
Abstract
Microalgal biomass is often used as a raw material in methane production. Some microalgae possess a complex cell-wall structure which has a low degradability of microorganisms in anaerobic digestion. However, some microalgae produce glycolate, which is excreted outside the cell and can be used to produce methane under anaerobic condition. This research aims to investigate microalgal cultivation using wastewater to reduce nutrients and efficiently create glycolate. Two strains of microalgae (Acutodesmus sp. AARL G023, Chlorella sp. AARL G049) and two microalgal consortia were cultivated at dilutions of 0.5-fold (W50), 0.75-fold (W75) and undiluted wastewater (W100). The results showed that the microalgal consortium with undiluted wastewater (WCW100) consisted of Leptolyngbya sp. (30.4%), Chlorella sp. (16.1%) and Chlamydomonas sp. (52.2%), revealed the highest biomass productivity at 64.38 ± 14.54 mg·L-1·d-1 and the highest glycolate productivity at 5.12 ± 0.48 mmol·L-1·d-1. The cultivation of microalgae effectively reduced ammonium‑nitrogen (NH4+-N) and soluble reactive phosphorus (SRP) levels in the wastewater at 43.5 ± 1.3% and 49.6 ± 6.9%. Furthermore, WCW100 showed the highest biogas productivity at 1.44 ± 0.07 mL·g-1·d-1 and the highest methane content at 58.3 ± 6.0% v/v. This study indicates that there is a definite potential of using undiluted wastewater for microalgal biomass production and glycolate production that can reduce the wastewater volume and be applied as a raw material for methane production.
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Affiliation(s)
- Thoranit Moungmoon
- PhD Degree Program in Environmental Science, Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chatchawan Chaichana
- Department of Mechanical Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chayakorn Pumas
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Wasu Pathom-Aree
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Khomsan Ruangrit
- Science and Technology Research Institute, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jeeraporn Pekkoh
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand; Environmental Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand.
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14
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Zhao N, Treu L, Angelidaki I, Zhang Y. Exoelectrogenic Anaerobic Granular Sludge for Simultaneous Electricity Generation and Wastewater Treatment. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:12130-12140. [PMID: 31507167 DOI: 10.1021/acs.est.9b03395] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A thick and electroactive biofilm is the key to the successful development of microbial electrochemical systems and technologies (METs). In this study, intact anaerobic granular sludge (AGS), which is a spherical and dense microbial association, was successfully demonstrated as a novel and efficient biocatalyst in METs such as microbial fuel cells. Three different strategies were explored to shift the microbial composition of AGS from methanogenic to exoelectrogenic microbes, including varying the external resistance and organic loading and manipulating the anode potential. Among all the strategies, only with positive anode potential, AGS was successfully shifted from methanogenic to exoelectrogenic conditions, as indicated by the significantly high current response (10.32 A/m2) and 100% removal of organic carbon from wastewater. Moreover, the AGS bioanode showed no significant decrease in current generation and organic removal at pH 5, indicating good tolerance of AGS to acidic conditions. Finally, 16S rRNA sequencing revealed the enrichment of exoelectrogens and inhibition of methanogens in the microbial community of AGS after anode potential control. This study provides a proof of concept for extracting electrical energy from organic wastes by exoelectrogenic AGS along with simultaneous wastewater treatment and meanwhile opens up a new paradigm to create an efficient and cost-effective exoelectrogenic biocatalyst for boosting the industrial application of METs.
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Affiliation(s)
- Nannan Zhao
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Lyngby , Denmark
| | - Laura Treu
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Lyngby , Denmark
| | - Irini Angelidaki
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Lyngby , Denmark
| | - Yifeng Zhang
- Department of Environmental Engineering , Technical University of Denmark , DK-2800 Lyngby , Denmark
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15
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Enhancing Stability of Microalgae Biocathode by a Partially Submerged Carbon Cloth Electrode for Bioenergy Production from Wastewater. ENERGIES 2019. [DOI: 10.3390/en12173229] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The electricity output from microbial fuel cell (MFC) with a microalgae assisted cathode is usually higher than that with an air cathode. The output of electricity from a photosynthetic microalgae MFC was positively correlated with the dissolved oxygen (DO) level in the microalgae assisted biocathode. However, DO is highly affected by the photosynthesis of microalgae, leading to the low stability in the electricity output that easily varies with the change in microalgae growth. In this study, to improve the electricity output stability of the MFC, a partially submerged carbon cloth cathode electrode was first investigated to use oxygen from both microalgae and air, with synthetic piggery wastewater used as the anolyte and anaerobically digested swine wastewater as the catholyte. When the DO levels dropped from 13.6–14.8 to 1.0–1.6 mg/L, the working voltages in the MFCs with partially submerged electrodes remained high (256–239 mV), whereas that for the conventional completely submerged electrodes dropped from 259 to 102 mV. The working voltages (average, 297 ± 26 mV) of the MFCs with the 50% submerged electrodes were significantly (p < 0.05) higher than with other partially or completely submerged electrodes. The associated maximum lipid production from wastewater was 250 ± 42 mg/L with lipid content of 41 ± 6% dry biomass. Although the partially submerged electrode had no significant effects on lipid production or nitrogen removal in wastewater, there was significant improvement in the stability of the electricity generated under variable conditions.
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Zhang L, Fu G, Zhang Z. Electricity generation and microbial community in long-running microbial fuel cell for high-salinity mustard tuber wastewater treatment. Bioelectrochemistry 2019; 126:20-28. [DOI: 10.1016/j.bioelechem.2018.11.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 11/05/2018] [Accepted: 11/05/2018] [Indexed: 12/19/2022]
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17
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Armato C, Ahmed D, Agostino V, Traversi D, Degan R, Tommasi T, Margaria V, Sacco A, Gilli G, Quaglio M, Saracco G, Schilirò T. Anodic microbial community analysis of microbial fuel cells based on enriched inoculum from freshwater sediment. Bioprocess Biosyst Eng 2019; 42:697-709. [PMID: 30694390 DOI: 10.1007/s00449-019-02074-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 01/11/2019] [Indexed: 01/30/2023]
Abstract
The characterization of anodic microbial communities is of great importance in the study of microbial fuel cells (MFCs). These kinds of devices mainly require a high abundance of anode respiring bacteria (ARB) in the anode chamber for optimal performance. This study evaluated the effect of different enrichments of environmental freshwater sediment samples used as inocula on microbial community structures in MFCs. Two enrichment media were compared: ferric citrate (FeC) enrichment, with the purpose of increasing the ARB percentage, and general enrichment (Gen). The microbial community dynamics were evaluated by polymerase chain reaction followed by denaturing gradient gel electrophoresis (PCR-DGGE) and real time polymerase chain reaction (qPCR). The enrichment effect was visible on the microbial community composition both during precultures and in anode MFCs. Both enrichment approaches affected microbial communities. Shannon diversity as well as β-Proteobacteria and γ-Proteobacteria percentages decreased during the enrichment steps, especially for FeC (p < 0.01). Our data suggest that FeC enrichment excessively reduced the diversity of the anode community, rather than promoting the proliferation of ARB, causing a condition that did not produce advantages in terms of system performance.
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Affiliation(s)
- Caterina Armato
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Turin, Italy.,Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy
| | - Daniyal Ahmed
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy.,Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Valeria Agostino
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy.,Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Deborah Traversi
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Turin, Italy
| | - Raffaella Degan
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Turin, Italy
| | - Tonia Tommasi
- Department of Applied Science and Technology, Politecnico di Torino, Turin, Italy
| | - Valentina Margaria
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy
| | - Adriano Sacco
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy
| | - Giorgio Gilli
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Turin, Italy
| | - Marzia Quaglio
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy
| | - Guido Saracco
- Centre for Sustainable Future Technologies (CSFT@PoliTo), Istituto Italiano di Tecnologia, Turin, Italy
| | - Tiziana Schilirò
- Department of Public Health and Pediatrics, University of Torino, Piazza Polonia 94, 10126, Turin, Italy.
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Ma W, Han Y, Xu C, Han H, Zhong D, Zhu H, Li K. The mechanism of synergistic effect between iron-carbon microelectrolysis and biodegradation for strengthening phenols removal in coal gasification wastewater treatment. BIORESOURCE TECHNOLOGY 2019; 271:84-90. [PMID: 30265956 DOI: 10.1016/j.biortech.2018.09.084] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/13/2018] [Accepted: 09/16/2018] [Indexed: 06/08/2023]
Abstract
A novel iron-carbon microelectrolysis (ICME) inoculated with activated sludge (AS) process was specifically designed to look into the roles of microelectrolysis and biodegradation as well as their synergistic effect on phenols removal in coal gasification wastewater (CGW) treatment. The results indicated that the removal efficiency of COD, phenols and TOC in integrated ICME-AS process reached 87.36 ± 2.98%, 92.62 ± 0.76% and 84.45 ± 0.65%, respectively. Moreover, phenols-degrading bacteria and electrochemical-active bacteria presented better adaptability to phenolic impact. Meanwhile their syntrophic interaction was driven under the simulation of microelectrolysis. Furthermore, electrochemical redox efficiency was significantly improved, and the corresponding maximum power output reached 0.043 ± 0.01 mW/cm2. Apparently, the synergistic effect between microelectrolysis and biological action effectively strengthened phenols degradation and electricity generation. The results proved that the integrated ICME-AS process was a promising technology applied for CGW and other refractory industrial wastewater treatments.
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Affiliation(s)
- Weiwei Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Yuxing Han
- School of Engineering, South China Agricultural University, Guangzhou 510642, China
| | - Chunyan Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Dan Zhong
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China.
| | - Hao Zhu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
| | - Kun Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin 150090, China
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Liu Z, Xiang P, Duan Z, Fu Z, Zhang L, Zhang Z. Electricity generation, salinity, COD removal and anodic biofilm microbial community vary with different anode CODs in a microbial desalination cell for high-salinity mustard tuber wastewater treatment. RSC Adv 2019; 9:25189-25198. [PMID: 35528677 PMCID: PMC9069894 DOI: 10.1039/c9ra04184b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 07/22/2019] [Indexed: 11/21/2022] Open
Abstract
A three-chamber microbial desalination cell (MDC) was constructed for high-salinity mustard tuber wastewater (MTWW) treatment. The effect of anode COD on electricity generation, salinity, COD removal and the anodic biofilm microbial community in MDC for the MTWW treatment was investigated. The results showed that electricity generation was better when the anode COD was 900 mg L−1versus when it was 400 or 1400 mg L−1. The ionic strength and conductivity of the anolyte were higher than those at 400 mg L−1; thus, the ohmic internal resistance was lower. In addition, the mass transfer internal resistance was lower than that at 1400 mg L−1, which made the system internal resistance the lowest; consequently, the voltage and power density were the highest. The output voltage, power density and coulombic efficiency of the 1000 Ω external resistors were 555 mV, 3.03 W m−3 and 26.5% ± 0.4%, respectively. Desalination was the highest when the anode COD was 400 mg L−1. The lowest ionic strength and osmotic pressure of the anolyte resulted in the strongest osmosis, thereby producing the highest desalination rate; the desalination rate was 5.33 mg h−1. When MDC was coupled with the dual-chamber microbial fuel cell (MFC), the desalinated MTWW could be used as the anode substrate of the MFC; its high COD could be removed continuously, and the COD removal values were 86.2% ± 2.5%, 83.0% ± 2.0% and 84.3% ± 2.4%. High-throughput sequencing analysis indicated that hydrolytic and fermentative bacteria were the core anode bacteria of MDC. The abundances of electrochemically active bacteria in the anode biofilms of the three groups were 11.78% (400 mg L−1 COD), 14.06% (900 mg L−1 COD) and 13.68% (1400 mg L−1 COD). Therefore, the differences in anode CODs impacted the abundance of electrochemically active bacteria, which led to differences in electricity generation performances. A three-chamber microbial desalination cell (MDC) was constructed for high-salinity mustard tuber wastewater (MTWW) treatment.![]()
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Affiliation(s)
- Zhe Liu
- College of Environment and Ecology
- Chongqing University
- Chongqing 400045
- China
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment
| | - Ping Xiang
- College of Environment and Ecology
- Chongqing University
- Chongqing 400045
- China
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment
| | - Zhuang Duan
- Zhuhai Planning and Design Institute
- Zhuhai
- China
| | - Zhaohui Fu
- Zhuhai Planning and Design Institute
- Zhuhai
- China
| | - Linfang Zhang
- College of Environment and Ecology
- Chongqing University
- Chongqing 400045
- China
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment
| | - Zhi Zhang
- College of Environment and Ecology
- Chongqing University
- Chongqing 400045
- China
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment
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20
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Gonzalez-Martínez A, Chengyuan S, Rodriguez-Sanchez A, Pozo C, Gonzalez-Lopez J, Vahala R. Application of microbial fuel cell technology for wastewater treatment and electricity generation under Nordic countries climate conditions: Study of performance and microbial communities. BIORESOURCE TECHNOLOGY 2018; 270:1-10. [PMID: 30199700 DOI: 10.1016/j.biortech.2018.09.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 08/30/2018] [Accepted: 09/01/2018] [Indexed: 06/08/2023]
Abstract
Two microbial fuel cells were inoculated with activated sludge from Finland and operated under moderate (25 °C) and low (8 °C) temperatures. Operation under real urban wastewater showed similarities in chemical oxygen demand removal and voltage generated, although moderate temperature supported higher ammonium oxidation. Fungi disappeared in the microbial fuel cell operated at temperature of 25 °C. Archaea domain was dominated by methanogenic archaea at both temperature scenarios. Important differences were observed in bacterial communities between both temperatures, however generating similar voltage. The results supported that the implementation of microbial fuel cells in Nordic countries operating under real conditions could be successful, as well as suggested the flexibility of cold-adapted inoculum for starting-up microbial fuel cells, regardless of the operating temperature of the system, obtaining higher COD removal and voltage generation performances at low temperature than at moderate temperature.
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Affiliation(s)
| | - Su Chengyuan
- Department of Environmental Engineering, Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection, Guangxi Normal University, Ministry of Education, Guilin 541004, People's Republic of China
| | | | - Clementina Pozo
- Institute of Water Research, University of Granada, C/Ramon y Cajal, 4, 18071 Granada, Spain
| | - Jesus Gonzalez-Lopez
- Institute of Water Research, University of Granada, C/Ramon y Cajal, 4, 18071 Granada, Spain
| | - Riku Vahala
- Department of Built Environment, School of Engineering, Aalto University, P.O. Box 15200, Aalto, FI-00076 Espoo, Finland
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21
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Islam MA, Ong HR, Ethiraj B, Cheng CK, Rahman Khan MM. Optimization of co-culture inoculated microbial fuel cell performance using response surface methodology. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 225:242-251. [PMID: 30092551 DOI: 10.1016/j.jenvman.2018.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 07/25/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
Microbial fuel cells (MFCs) are considered as promising technology to achieve simultaneous wastewater treatment and electricity generation. However, operational and technological developments are still required to make it as a sustainable technology. In the present study, response surface methodology (RSM) was used to evaluate the effects of substrate concentration, co-culture composition, pH and time on the performance of co-culture (Klebsiella variicola and Pseudomonas aeruginosa) inoculated double chamber MFC. From the statistical analysis, it can be seen that the performance of MFC was not influenced by the interaction between the initial COD and time, pH and time, pH and initial COD, time and initial COD. However, the interaction between the inoculum composition and time, pH and the inoculum composition, initial COD and inoculum composition significantly influenced the performance of MFC. Based on the RSM results, best performance (power density and COD removal efficiency) was obtained when the inoculum composition, initial COD, pH and time were about 1:1, 26.690 mg/L, 7.21 and 15.50 days, respectively. The predictions from the model were in close agreement with the experimental results suggesting that the proposed model could adequately represent the actual relationships between the independent variables generating electricity and the COD removal efficiency.
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Affiliation(s)
- M Amirul Islam
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia
| | - Huei Ruey Ong
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia; Faculty of Engineering and Technology, DRB-HICOM University of Automotive Malaysia, 26607 Pekan Pahang, Malaysia
| | - Baranitharan Ethiraj
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia; Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode District, India
| | - Chin Kui Cheng
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia; Centre of Excellence for Advanced Research in Fluid Flow (CARIFF), Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia
| | - Md Maksudur Rahman Khan
- Faculty of Chemical and Natural Resources Engineering, Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia; Centre of Excellence for Advanced Research in Fluid Flow (CARIFF), Universiti Malaysia Pahang, 26300 Gambang Pahang, Malaysia.
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22
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Vicari F, Asensio Y, Fernandez-Marchante CM, Lobato J, Cañizares P, Scialdone O, Rodrigo MA. Influence of the initial sludge characteristics and acclimation on the long-term performance of double-compartment acetate-fed microbial fuel cells. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.08.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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23
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Martínez EJ, Rosas JG, Sotres A, Moran A, Cara J, Sánchez ME, Gómez X. Codigestion of sludge and citrus peel wastes: Evaluating the effect of biochar addition on microbial communities. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.06.010] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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24
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Impact of the start-up process on the microbial communities in biocathodes for electrosynthesis. Bioelectrochemistry 2018; 121:27-37. [DOI: 10.1016/j.bioelechem.2018.01.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 01/04/2018] [Accepted: 01/04/2018] [Indexed: 01/09/2023]
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25
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Cheng C, Zhou Z, Qiu Z, Yang J, Wu W, Pang H. Enhancement of sludge reduction by ultrasonic pretreatment and packing carriers in the anaerobic side-stream reactor: Performance, sludge characteristics and microbial community structure. BIORESOURCE TECHNOLOGY 2018; 249:298-306. [PMID: 29054059 DOI: 10.1016/j.biortech.2017.10.043] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 10/03/2017] [Accepted: 10/07/2017] [Indexed: 06/07/2023]
Abstract
Effects of ultrasonic pretreatment and packing carriers on sludge reduction, settleability, dewaterability and microbial community structure in the anaerobic side-stream reactor (ASSR) were investigated with three anaerobic reactors operated in parallel. Ultrasonication from 3.65% in the ASSR to 5.08%, and packing carriers further enhanced the efficiency to 19.2%. Ultrasonic pretreatment of sludge decreased oxidation-reduction potential in ASSR and enhanced the release of intracellular substances. The deterioration of sludge settleability and dewaterability in the ASSR after ultrasonic pretreatment was improved by packing carriers. Illumina-MiSeq sequencing showed that microbial richness and diversity increased after ultrasonic pretreatment and packing carriers in the ASSR. Packing carriers favored the growth of slow grower (Dechloromonas), fermentative bacteria (Draconibacteriaceae, Fusibacter, Acidaminobacter) and floc-forming bacteria (Zoogloea), while hydrolytic and predatory bacteria (Saprospiraceae_unculture) and slow grower (Thauera) was enriched in the ASSR.
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Affiliation(s)
- Cheng Cheng
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Zhen Zhou
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China.
| | - Zhan Qiu
- Shanghai Chentou Wastewater Treatment Co., Ltd, Shanghai 201203, China
| | - Jiyuan Yang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Wei Wu
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
| | - Hongjian Pang
- College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
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26
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Liu S, Li L, Li H, Wang H, Yang P. Study on ammonium and organics removal combined with electricity generation in a continuous flow microbial fuel cell. BIORESOURCE TECHNOLOGY 2017; 243:1087-1096. [PMID: 28764115 DOI: 10.1016/j.biortech.2017.07.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 07/12/2017] [Accepted: 07/13/2017] [Indexed: 06/07/2023]
Abstract
A continuous microbial fuel cell system was constructed treating ammonium/organics rich wastewater. Operational performance of MFC system, mechanisms of ammonium removal, effect of ammonium on organics removal and energy output, C and N balance of anode chamber and microbial community analysis of anode chamber were studied. It was concluded that 0.0914kg/m3d NH4+-N and 5.739kg/m3d COD were removed from anode chamber and simultaneous nitrification and denitrification (SND) occurred in cathode chamber resulting in COD, TN removal rate of 88.53%, 71.35% respectively. Excess ammonium affected energy output and the MFC system reached maximum energy output of 816.8mV and 62.94mW/m3. In anode chamber, Spirochaetes bacterium sp., Methanobacterium formicicum sp. was predominant in bacteria, archaea communities respectively which contributed to wastewater treatment and electricity generation. This study showed the potential for practical application of continuous flow MFC system treating ammonium/organics rich wastewater and achieving electricity generation simultaneously.
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Affiliation(s)
- Shuxin Liu
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Lan Li
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Huiqiang Li
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Hui Wang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Ping Yang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
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27
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Xie B, Gong W, Ding A, Yu H, Qu F, Tang X, Yan Z, Li G, Liang H. Microbial community composition and electricity generation in cattle manure slurry treatment using microbial fuel cells: effects of inoculum addition. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:23226-23235. [PMID: 28831702 DOI: 10.1007/s11356-017-9959-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 08/11/2017] [Indexed: 06/07/2023]
Abstract
Microbial fuel cell (MFC) is a sustainable technology to treat cattle manure slurry (CMS) for converting chemical energy to bioelectricity. In this work, two types of allochthonous inoculum including activated sludge (AS) and domestic sewage (DS) were added into the MFC systems to enhance anode biofilm formation and electricity generation. Results indicated that MFCs (AS + CMS) obtained the maximum electricity output with voltage approaching 577 ± 7 mV (~ 196 h), followed by MFCs (DS + CMS) (520 ± 21 mV, ~ 236 h) and then MFCs with autochthonous inoculum (429 ± 62 mV, ~ 263.5 h). Though the raw cattle manure slurry (RCMS) could facilitate electricity production in MFCs, the addition of allochthonous inoculum (AS/DS) significantly reduced the startup time and enhanced the output voltage. Moreover, the maximum power (1.259 ± 0.015 W/m2) and the highest COD removal (84.72 ± 0.48%) were obtained in MFCs (AS + CMS). With regard to microbial community, Illumina HiSeq of the 16S rRNA gene was employed in this work and the exoelectrogens (Geobacter and Shewanella) were identified as the dominant members on all anode biofilms in MFCs. For anode microbial diversity, the MFCs (AS + CMS) outperformed MFCs (DS + CMS) and MFCs (RCMS), allowing the occurrence of the fermentative (e.g., Bacteroides) and nitrogen fixation bacteria (e.g., Azoarcus and Sterolibacterium) which enabled the efficient degradation of the slurry. This study provided a feasible strategy to analyze the anode biofilm formation by adding allochthonous inoculum and some implications for quick startup of MFC reactors for CMS treatment.
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Affiliation(s)
- Binghan Xie
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Weijia Gong
- School of Engineering, Northeast Agriculture University, 59 Mucai Street, Xiangfang District, Harbin, 150030, China.
| | - An Ding
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Huarong Yu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Fangshu Qu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Xiaobin Tang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Zhongsen Yan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Guibai Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Nangang District, Harbin, 150090, China.
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28
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Saratale GD, Saratale RG, Shahid MK, Zhen G, Kumar G, Shin HS, Choi YG, Kim SH. A comprehensive overview on electro-active biofilms, role of exo-electrogens and their microbial niches in microbial fuel cells (MFCs). CHEMOSPHERE 2017; 178:534-547. [PMID: 28351012 DOI: 10.1016/j.chemosphere.2017.03.066] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/14/2017] [Accepted: 03/16/2017] [Indexed: 06/06/2023]
Abstract
Microbial fuel cells (MFCs) are biocatalyzed systems which can drive electrical energy by directly converting chemical energy using microbial biocatalyst and are considered as one of the important propitious technologies for sustainable energy production. Much research on MFCs experiments is under way with great potential to become an alternative to produce clean energy from renewable waste. MFCs have been one of the most promising technologies for generating clean energy industry in the future. This article summarizes the important findings in electro-active biofilm formation and the role of exo-electrogens in electron transfer in MFCs. This study provides and brings special attention on the effects of various operating and biological parameters on the biofilm formation in MFCs. In addition, it also highlights the significance of different molecular techniques used in the microbial community analysis of electro-active biofilm. It reviews the challenges as well as the emerging opportunities required to develop MFCs at commercial level, electro-active biofilms and to understand potential application of microbiological niches are also depicted. Thus, this review is believed to widen the efforts towards the development of electro-active biofilm and will provide the research directions to overcome energy and environmental challenges.
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Affiliation(s)
- Ganesh Dattatraya Saratale
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | - Rijuta Ganesh Saratale
- Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | | | - Guangyin Zhen
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Dongchuan Rd. 500, Shanghai 200241, China
| | - Gopalakrishnan Kumar
- Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
| | - Han-Seung Shin
- Department of Food Science and Biotechnology, Dongguk University-Seoul, Ilsandong-gu, Goyang-si, Gyeonggi-do, 10326, Republic of Korea
| | - Young-Gyun Choi
- Department of Environmental Engineering, Daegu university, Gyeongsan, Republic of Korea
| | - Sang-Hyoun Kim
- Department of Environmental Engineering, Daegu university, Gyeongsan, Republic of Korea
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