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Wei Y, Chen W, Hou J, Qi X, Ye M, Jiang N, Meng F, Xi B, Li M. Biogas upgrading performance and underlying mechanism in microbial electrolysis cell and anaerobic digestion integrated system. BIORESOURCE TECHNOLOGY 2024; 400:130683. [PMID: 38599352 DOI: 10.1016/j.biortech.2024.130683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 04/06/2024] [Accepted: 04/07/2024] [Indexed: 04/12/2024]
Abstract
The productivity and efficiency of two-chamber microbial electrolysis cell and anaerobic digestion integrated system (MEC-AD) were promoted by a complex of anaerobic granular sludge and iron oxides (Fe-AnGS) as inoculum. Results showed that MEC-AD with Fe-AnGS achieved biogas upgrading with a 23%-29% increase in the energy recovery rate of external circuit current and a 26%-31% decrease in volatile fatty acids. The energy recovery rate of MEC-AD remained at 52%-57%, indicating a stable operation performance. The selectively enriched methanogens and electroactive bacteria resulted in dominant hydrogenotrophic and acetoclastic methanogenesis in the cathode and anode chambers. Mechanistic analysis revealed that MEC-AD with Fe-AnGS led to specifically upregulated enzymes related to energy metabolism and electron transfer. Fe-AnGS as inoculum could improve the long-term operation performance of MEC-AD. Consequently, this study provides an efficient strategy for biogas upgrading in MEC-AD.
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Affiliation(s)
- Yufang Wei
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Wangmi Chen
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Jiaqi Hou
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Xuejiao Qi
- Shandong Industrial Engineering Laboratory of Biogas Production & Utilization, Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Synthetic Biology, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, PR China
| | - Meiying Ye
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Ning Jiang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Fanhua Meng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Beidou Xi
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China
| | - Mingxiao Li
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China.
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Iliopoulou A, Arvaniti OS, Deligiannis M, Gatidou G, Vyrides I, Fountoulakis MS, Stasinakis AS. Combined use of strictly anaerobic MBBR and aerobic MBR for municipal wastewater treatment and removal of pharmaceuticals. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 343:118211. [PMID: 37253313 DOI: 10.1016/j.jenvman.2023.118211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/17/2023] [Accepted: 05/18/2023] [Indexed: 06/01/2023]
Abstract
An integrated lab-scale wastewater treatment system consisting of an anaerobic Moving Bed Biofilm Reactor (AnMBBR) and an aerobic Membrane Bioreactor (AeMBR) in series was used to study the removal and fate of pharmaceuticals during wastewater treatment. Continuous-flow experiments were conducted applying different temperatures to the AnMBBR (Phase A: 35 °C; Phase B: 20 °C), while batch experiments were performed for calculating sorption and biotransformation kinetics. The total removal of major pollutants and target pharmaceuticals was not affected by the temperature of the AnMBBR. In Phase A, the average removal of dissolved chemical oxygen demand (COD), biological oxygen demand (BOD), and ammonium nitrogen (NH4-N) was 86%, 91% and 96% while in Phase B, 91%, 96% and 96%, respectively. Removal efficiencies ranging between 65% and 100% were observed for metronidazole (MTZ), trimethoprim (TMP), sulfamethoxazole (SMX), and valsartan (VAL), while slight (<30%) or no removal was observed for carbamazepine (CBZ) and diclofenac (DCF), respectively. Application of a mass balance model showed that the predominant mechanism for the removal of pharmaceuticals was biotransformation, while the role of sorption was of minor importance. The AeMBR was critical for VAL, SMX and TMP biodegradation; the elimination of MTZ was strongly enhanced by the AnMBBR. In both bioreactors, Bacteroidetes was the dominant phylum in both bioreactors over time. In the AnMBBR, Cloacibacterium and Bacteroides had a higher abundance in the biocarriers compared to the suspended biomass.
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Affiliation(s)
- Athanasia Iliopoulou
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Olga S Arvaniti
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece; Department of Agricultural Development, Agrofood and Management of Natural Resources, National and Kapodistrian University of Athens, Psachna, 34400, Greece
| | - Michalis Deligiannis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Georgia Gatidou
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Ioannis Vyrides
- Department of Chemical Engineering, Cyprus University of Technology, 95 Eirinis Str., Limassol, 3603, Cyprus
| | - Michalis S Fountoulakis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece
| | - Athanasios S Stasinakis
- Water and Air Quality Laboratory, Department of Environment, University of the Aegean, Mytilene, 81100, Greece.
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Ameen F, Al-Homaidan AA. Oily bilge water treatment using indigenous soil bacteria: Implications for recycling the treated sludge in vegetable farming. CHEMOSPHERE 2023:139040. [PMID: 37244558 DOI: 10.1016/j.chemosphere.2023.139040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/06/2023] [Accepted: 05/24/2023] [Indexed: 05/29/2023]
Abstract
Hydrocarbon contamination from motorized vessels operating on seas threaten marine ecosystems and need to treated efficiently. A bilge wastewater treatment using indigenous bacteria isolated from oil contaminated soil was studied. Five bacterial isolates (Acinetobacter baumanni, Klebsiella aerogenes, Pseudomonas fluorescence, Bacillus subtilis and Brevibacterium linens) were isolated from port soil and used in the bilge water treatment. Their crude oil degradation abilities were first confirmed experimentally. The single species and the consortia of each two species were compared in an experiment where the conditions were first optimized. The optimized conditions were 40 °C, carbon source glucose, nitrogen source ammonium chloride, pH 8, and salinity 25%. Each of the species and each combination was able to degrade oil. K. aerogenes and P. fluorescence were the most efficient in reducing the crude oil concentration. The crude oil concentration was reduced from 290 mg/L to 23 mg/L and 21 mg/L, respectively. The respective values for the loss in turbidity were from 320 NTU to 29 mg/L and 27 NTU and for BOD loss from 210 mg/L to 18 mg/L and 16 mg/L. Mn was reduced from 25.4 mg/L to 1.2 mg/L and 1.0 mg/L, Cu from 26.8 mg/L to 2.9 mg/L and 2.4 mg/L, and Pb from 29.8 mg/L to 1.5 mg/L and 1.8 mg/L. The consortium of K. aerogenes and P. fluorescence in the bilge wastewater treatment reduced the crude oil concentration to 11 mg/L. After the treatment, the water was removed and the sludge was composted with palm molasses and cow dung. After 60 days of composting and inoculation with different bacterial consortia, the final product was used as a seedbed for vegetables. The compost with the consortium K. aerogenes and P. fluorescence promoted vegetable plant growth most and could be used in farming.
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Affiliation(s)
- Fuad Ameen
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia.
| | - Ali A Al-Homaidan
- Department of Botany & Microbiology, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
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Shi J, Zhang G, Zhang S, Lu R, Chen M. Biodegradation and optimization of bilge water in a sequencing batch reactor using response surface methodology. CHEMOSPHERE 2022; 307:135654. [PMID: 35863410 DOI: 10.1016/j.chemosphere.2022.135654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/23/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
Bilge water is a significant source of pollution in the marine environment and has captured widespread international attention. In this study, a sequencing batch reactor (SBR) combined with strain S2 identified as Bacillus licheniformis was employed to assess the biodegradation of Chemical Oxygen Demand (COD) from bilge water. The influencing variables such as temperature, pH level and inoculum concentration on the performance SBR system were optimized by utilizing response surface methodology (RSM). The experimental results showed that the maximum COD removal of 77.81% was reached at the optimal SBR operation conditions of temperature 35.44 °C pH 8.13, and inoculum concentration 31.47 mL. In the practical application of SBR, it was found that the decrease in hydraulic retention time (HRT) was accompanied by a decrease in COD degradation rate. The biodegradation kinetics of COD in bilge water were well fitted with the first-order equation with a higher R2 value of 0.98106. In conclusion, COD in bilge water can be efficiently biodegraded by SBR under the optimization of RSM.
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Affiliation(s)
- Jianqiang Shi
- College of Merchant Marine, Shanghai Maritime University, Shanghai, 201306, China.
| | - Guichen Zhang
- College of Merchant Marine, Shanghai Maritime University, Shanghai, 201306, China
| | - Shaojun Zhang
- School of Navigation and Shipping, Shandong Jiaotong University, Weihai, 264200, China
| | - Run Lu
- College of Merchant Marine, Shanghai Maritime University, Shanghai, 201306, China
| | - Mengwei Chen
- College of Merchant Marine, Shanghai Maritime University, Shanghai, 201306, China
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Soo PL, Bashir MJK, Wong LP. Recent advancements in the treatment of palm oil mill effluent (POME) using anaerobic biofilm reactors: Challenges and future perspectives. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 320:115750. [PMID: 35933874 DOI: 10.1016/j.jenvman.2022.115750] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 06/28/2022] [Accepted: 07/10/2022] [Indexed: 06/15/2023]
Abstract
Palm oil is the most utilized vegetable globally which is mostly produced in countries such as Malaysia, Indonesia and Thailand. The great amount of POME generation from palm oil mills is now a threat to the environment and require a suitable treatment of POME to reduce the organic strength in accordance with the standard discharge limit before releasing to the environment. Currently, the technology to combine the anaerobic process and biofilm system in bioreactors have produced a fresh idea in treatments of high strength wastewater like POME. Anaerobic biofilm reactor is a convincing method for POME treatment due to its significant advantages over the conventional biological treatments consisting of anaerobic, aerobic and facultative pond systems. Overall, integrated anaerobic-aerobic bioreactor (IAAB) can remove more than 99% of chemical oxygen demand (COD), biochemical oxygen demand (BOD) and total suspended solids (TSS) with the combination of anaerobic and aerobic digestion for POME treatment. It has better performance as compared to up-flow anaerobic sludge blanket (UASB) and up-flow anaerobic filter (UAF) with 80% and 88-94% COD removal efficiency respectively. Anaerobic pond was found to perform well also by removing 97.8% of COD in POME but require long retention time and larger land. Hence, this study aims to provide intensive review of the performance of the anaerobic biofilm reactor in treating POME and the recent advancements in this technology. The limitations and future perspectives in utilization of anaerobic biofilm reactor during its operation in treating POME are discussed.
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Affiliation(s)
- Pei Ling Soo
- Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), UniversitiTunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
| | - Mohammed J K Bashir
- Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), UniversitiTunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
| | - Lai-Peng Wong
- Department of Environmental Engineering, Faculty of Engineering and Green Technology (FEGT), UniversitiTunku Abdul Rahman, 31900, Kampar, Perak, Malaysia.
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Poornima S, Manikandan S, Karthik V, Balachandar R, Subbaiya R, Saravanan M, Lan Chi NT, Pugazhendhi A. Emerging nanotechnology based advanced techniques for wastewater treatment. CHEMOSPHERE 2022; 303:135050. [PMID: 35623429 DOI: 10.1016/j.chemosphere.2022.135050] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/12/2022] [Accepted: 05/19/2022] [Indexed: 06/15/2023]
Abstract
The increasing trend of industrialization leads to tremendous release of industrial effluents. Waste water treatment is one of the important sectors to focus in order to overcome the most threatening issue of waste disposal and to ensure sustainability. Sustainable and energy efficient treatment methods are the attractive technologies for their current implementation of waste management. Even though the existing technologies are effective, unsustainability makes them unfit for their extended applications. Conventional and advanced technologies have been extensively implemented for the treatment of wide spectrum of effluents. Hybrid technologies including chemical and biological methods also emerging as promising technologies but secondary sludge generation is still unaddressed. Even though effectiveness of biochar varies over type of contaminants, cost-effectiveness and eco-friendly nature extended their applications in waste management. Nanotechnology and membrane technology are the promising and emerging areas of interest due to their widespread applications in waste water treatment. Carbon nano structures, nano filters, graphene, nano magnets modified with activated carbon are the potential candidates for the treatment. The present review demonstrates the emerging treatment technologies with special focus to nano based waste water treatment methods.
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Affiliation(s)
- Shanmugam Poornima
- Department of Biotechnology, K. S. Rangasamy College of Technology, Tiruchengode, 637 215, Namakkal District, Tamil Nadu, India
| | - Sivasubramanian Manikandan
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai, 602 105, Tamil Nadu, India
| | - Vivekanandhan Karthik
- Department of Biotechnology, K. S. Rangasamy College of Technology, Tiruchengode, 637 215, Namakkal District, Tamil Nadu, India
| | - Ramalingam Balachandar
- Department of Biotechnology, Prathyusha Engineering College, Aranvoyalkuppam, Poonamallee - Tiruvallur Road, Tiruvallur, 602 025, Tamil Nadu, India
| | - Ramasamy Subbaiya
- Department of Biological Sciences, School of Mathematics and Natural Sciences, The Copperbelt University, Riverside, Jambo Drive, P O Box: 21692, Kitwe, Zambia
| | - Muthupandian Saravanan
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, 600007, India
| | - Nguyen Thuy Lan Chi
- School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Arivalagan Pugazhendhi
- Emerging Materials for Energy and Environmental Applications Research Group, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
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Microbial Electrosynthesis Inoculated with Anaerobic Granular Sludge and Carbon Cloth Electrodes Functionalized with Copper Nanoparticles for Conversion of CO2 to CH4. NANOMATERIALS 2022; 12:nano12142472. [PMID: 35889697 PMCID: PMC9317797 DOI: 10.3390/nano12142472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 06/21/2022] [Accepted: 07/11/2022] [Indexed: 01/27/2023]
Abstract
Microbial electrosynthesis (MES) can sustainably convert CO2 to products and significant research is currently being conducted towards this end, mainly in laboratory-scale studies. The high-cost ion exchange membrane, however, is one of the main reasons hindering the industrialization of MES. This study investigates the conversion of CO2 (as a sole external carbon source) to CH4 using membraneless MES inoculated with anaerobic granular sludge. Three types of electrodes were tested: carbon cloth (CC) and CC functionalized with Cu NPs, where Cu NPs were deposited for 15 and 45 min, respectively. During the MES experiment, which lasted for 144 days (six cycles), methane was consistently higher in the serum bottles with CC electrodes and applied voltage. The highest CH4 (around 46%) was found in the second cycle after 16 days. The system’s performance declined during the following cycles; nevertheless, the CH4 composition was twice as high compared to the serum bottles without voltage. The MES with Cu NPs functionalized CC electrodes had a higher performance than the MES with plain CC electrodes. Microbial profile analysis showed that the Methanobacterium was the most dominant genus in all samples and it was found in higher abundance on the cathodes, followed by the anodes, and then in the suspended biomass. The genus Geobacter was identified only on the anodes regarding relative bacterial abundance at around 6–10%. Desulfovibrio was the most dominant genus in the cathodes; however, its relative abundance was significantly higher for the cathodes with Cu NPs.
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