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Li Y, Wang M, Qian J, Hong Y, Huang T. Enhanced degradation of phenolic compounds in coal gasification wastewater by an iron‑carbon micro-electric field coupled with anaerobic co-digestion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 819:151991. [PMID: 34848265 DOI: 10.1016/j.scitotenv.2021.151991] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 06/13/2023]
Abstract
Coal gasification wastewater contains many refractory and toxic pollutants, especially high concentrations of total phenols, which are difficult to degrade by microorganisms. The aim of our study is to explore the anaerobically enhanced degradation of coal gasification wastewater by an iron‑carbon micro-electric field coupled with anaerobic co-digestion. The optimal ratio of activated carbon to iron and the optimal dosage of co-substrate (glucose = 1500 mg/L) were investigated by batch tests. In the long-term operation of the iron‑carbon reactor, 1500 mg/L glucose was added into the influent, and carbon and iron in a ratio of 2:1 were added to the anaerobic sludge. The average effluent COD and total phenols concentrations were kept at approximately 455 and 56.3 mg/L, respectively, and removal rates of both reached 90% after treatment with the iron‑carbon micro-electric field coupled with anaerobic co-digestion in the iron‑carbon reactor. Moreover, compared with the control reactor, the methane production from the iron‑carbon reactor increased to 200 mL/day, with an increase in the methane production rate by 90%. Microbial community analysis indicated that hydrogenotrophic methanogens were enriched, and syntrophic metabolism via interspecies hydrogen transfer was enhanced. Direct interspecies electron transfer might occur between the potential electroactive bacteria Clostridium, Bacteroidetes, and Anaerolinea and the methanogens Methanosaeta, Methanobacterialies, and Methanobacterium for syntrophic metabolism through the iron‑carbon process coupled with anaerobic co-digestion.
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Affiliation(s)
- Yajie Li
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Mengyan Wang
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Jingli Qian
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Yaoliang Hong
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China
| | - Tianyin Huang
- School of Environmental Science and Engineering, Jiangsu Provincial Key Laboratory of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu Province, China.
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2
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Coupling Removal of P-Chloronitrobenzene and Its Reduction Products by Nano Iron Doped with Ni and FeOOH (nFe/Ni-FeOOH). MATERIALS 2022; 15:ma15051928. [PMID: 35269159 PMCID: PMC8911972 DOI: 10.3390/ma15051928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/15/2022] [Accepted: 03/01/2022] [Indexed: 02/04/2023]
Abstract
The removal of chlorinated pollutants from water by nanoparticles is a hot topic in the field of environmental engineering. In this work, a novel technique that includes the coupling effect of n-Fe/Ni and its transformation products (FeOOH) on the removal of p-chloronitrobenzene (p-CNB) and its reduction products, p-chloroaniline (p-CAN) and aniline (AN), were investigated. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were employed to characterize the nano-iron before and after the reaction. The results show that Fe0 is mainly oxidized into lath-like lepidocrocite (γ-FeOOH) and needle-like goethite (α-FeOOH) after 8 h of reaction. The coupling removal process and the mechanism are as follows: Fe0 provides electrons to reduce p-CNB to p-CAN and then dechlorinates p-CAN to AN under the catalysis of Ni. Meanwhile, Fe0 is oxidized to FeOOH by the dissolved oxygen and H2O. AN is then adsorbed by FeOOH. Finally, p-CNB, p-CAN, and AN were completely removed from the water. In the pH range between 3 and 7, p-CAN can be completely dechlorinated by n-Fe/Ni within 20 min, while AN can be nearly 100% adsorbed by FeOOH within 36 h. When the temperature ranges from 15 °C to 35 °C, the dechlorination rate of p-CAN and the removal rate of AN are less affected by temperature. This study provides guidance on the thorough remediation of water bodies polluted by chlorinated organics.
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Liu C, Chen X, Banwart SA, Du W, Yin Y, Guo H. A novel permeable reactive biobarrier for ortho-nitrochlorobenzene pollution control in groundwater: Experimental evaluation and kinetic modelling. JOURNAL OF HAZARDOUS MATERIALS 2021; 420:126563. [PMID: 34271441 DOI: 10.1016/j.jhazmat.2021.126563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 06/25/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
Three novel permeable reactive barrier (PRB) materials composed of Cu/Fe with 0.24% and 0.43% (w/w) Cu loadings or Fe0 supported on wheat straw were prepared (termed materials E, F and G). These materials exhibited excellent pollutant removal efficiency and physical stability as well as the ongoing release of organic carbon and iron. Column experiments showed that materials E, F and G removed almost 100% of ortho-nitrochlorobenzene (o-NCB) from water. The rates of iron release from the E and F columns exceeded those from column G but this had no significant effect on o-NCB removal. The bacteria that degraded o-NCB in E and F were also different from those in G. The levels of these bacteria in the columns were higher than those in the initial materials, with the highest level in column E. The simultaneous reduction and microbial degradation of o-NCB was observed, with the latter being dominant. A kinetic model was established to simulate the dynamic interactions and accurately predicted the experimental results. Organic carbon from the wheat straw supported the majority of the biomass in each column, which was essential for the bioremediation process. The findings of this study suggest an economically viable approach to mitigating o-NCB pollution.
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Affiliation(s)
- Cuicui Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Xiaohui Chen
- School of Civil Engineering, University of Leeds, Leeds LS2 9JT, UK
| | - Steven A Banwart
- School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK; Global Food and Environment Institute, University of Leeds, Leeds LS2 9JT, UK
| | - Wenchao Du
- School of the Environment, Nanjing Normal University, Nanjing 210023, China
| | - Ying Yin
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Hongyan Guo
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Joint International Research Centre for Critical Zone Science-University of Leeds and Nanjing University, Nanjing University, Nanjing 210023, China.
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Guo X, Sun C, Lin R, Xia A, Huang Y, Zhu X, Show PL, Murphy JD. Effects of foam nickel supplementation on anaerobic digestion: Direct interspecies electron transfer. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:122830. [PMID: 32937692 DOI: 10.1016/j.jhazmat.2020.122830] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 04/17/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
Stimulating direct interspecies electron transfer with conductive materials is a promising strategy to overcome the limitation of electron transfer efficiency in syntrophic methanogenesis of industrial wastewater. This paper assessed the impact of conductive foam nickel (FN) supplementation on syntrophic methanogenesis and found that addition of 2.45 g/L FN in anaerobic digestion increased the maximum methane production rate by 27.4 % (on day 3) while decreasing the peak production time by 33 % as compared to the control with no FN. Cumulative methane production from day 2 to 6 was 14.5 % higher with addition of 2.45 g/L FN than in the control. Levels of FN in excess of 2.45 g/L did not show benefits. Cyclic voltammetry results indicated that the biofilm formed on the FN could generate electrons. The dominant bacterial genera in suspended sludge were Dechlorobacter and Rikenellaceae DMER64, whereas that in the FN biofilm was Clostridium sensu stricto 11. The dominant archaea Methanosaeta in the FN biofilm was enriched by 14.1 % as compared to the control.
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Affiliation(s)
- Xiaobo Guo
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Chihe Sun
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Richen Lin
- MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
| | - Ao Xia
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
| | - Yun Huang
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Xianqing Zhu
- Key Laboratory of Low-Grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, College of Energy and Power Engineering, Chongqing University, Chongqing 400044, China
| | - Pau-Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Jalan Broga Semenyih, 43500, Selangor Darul Ehsan, Malaysia
| | - Jerry D Murphy
- MaREI Centre, Environmental Research Institute, University College Cork, Cork, Ireland; School of Engineering, University College Cork, Cork, Ireland
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Tang CJ, Zhang L, Feng F, Xiong L, Mahmood Q, Zeng W, Chai X, Wang Y. Long-term domestication to Mn stresses alleviates the inhibition on anammox process. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:1966-1974. [PMID: 32108974 DOI: 10.1002/wer.1316] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 02/16/2020] [Accepted: 02/22/2020] [Indexed: 06/10/2023]
Abstract
Heavy metals such as Mn2+ are common contaminants in ammonium-rich wastewater. The information of Mn2+ effect on anammox process needs further investigation. The short- and long-term effects of Mn2+ on anammox were explored by anammox granular sludge. Batch tests showed that the half inhibition value (IC50 ) of Mn2+ was 4.83 mg/L. The anammox activity was severely inhibited in 0.5 hr under 15 mg/L Mn2+ . However, after long-term domestication by increasing the concentration of Mn2+ , both the low-load reactor (R1) and the high-load reactor (R2) performed well, achieving volumetric nitrogen removal rate of 6.36 kg/(m3 ·d) and 13.99 kg/(m3 ·d), respectively. The average ammonium and nitrite removal efficiency of both reactors under 200 mg/L Mn still maintained above 90%. The results from long-term reactors' operation showed that the serious inhibition effect indicated by the batch test was significantly exaggerated. The granules became dispersed after long-term operation in the high-load reactor (R2) which might be correlated to the high osmotic pressure caused by high Mn2+ load, and the mechanism needs to be investigated further. PRACTITIONER POINTS: The half inhibition value of Mn2+ on anammox sludge was 4.83 mg/L in batch experiment. 200 mg/L Mn2+ did not cause any inhibition on anammox process during long-term operation. Granular sludge is finer under high nitrogen loads with 200 mg/L Mn stress.
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Affiliation(s)
- Chong-Jian Tang
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Lin Zhang
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Fan Feng
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Lei Xiong
- School of Metallurgy and Environment, Central South University, Changsha, China
| | - Qaisar Mahmood
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Weizhi Zeng
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Xilin Chai
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
| | - Yunyan Wang
- School of Metallurgy and Environment, Central South University, Changsha, China
- Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, China
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6
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Iron-assisted biological wastewater treatment: Synergistic effect between iron and microbes. Biotechnol Adv 2020; 44:107610. [DOI: 10.1016/j.biotechadv.2020.107610] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 08/06/2020] [Accepted: 08/08/2020] [Indexed: 12/21/2022]
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Zhang J, Qu Y, Qi Q, Zhang P, Zhang Y, Tong YW, He Y. The bio-chemical cycle of iron and the function induced by ZVI addition in anaerobic digestion: A review. WATER RESEARCH 2020; 186:116405. [PMID: 32932096 DOI: 10.1016/j.watres.2020.116405] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 08/10/2020] [Accepted: 09/06/2020] [Indexed: 06/11/2023]
Abstract
Zero-valent iron (ZVI) is known to be an additive in facilitating waste treatment and improving biogas production in anaerobic digestion (AD) systems. This review concentrates on the chemical cycle of iron as well as the function of the iron cycle in the removal of four kinds of pollutants: organic carbon, nitrogen, sulphur and phosphorus, which are commonly encountered in waste treatment. In recent studies, the addition of ZVI to an AD system promoted the in-situ production of CH4 from CO2, enabling carbon capture through biotechnology. Additionally, using iron-carbon microbial electrolytic cells in AD systems in order to accelerate electron transport, as well as specific pollutant degradation mechanisms, are illustrated in the present study. Particularly, the main factors affecting the removal efficiency of contaminants in a ZVI-AD system such as pH, VFA/ Alkalinity (ALK), oxidation-reduction potential and particle size are reviewed. According to the above characteristics, combined with technical model and economic analyses, an AD system based on ZVI was considered to be an economical, efficient and carbon-neutral pollutant treatment technology. Accordingly, Iron-based AD is suggested to be a promising and sustainable approach orientated to a circular economy, which may be applied to many waste treatments fields.
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Affiliation(s)
- Jingxin Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Yiyuan Qu
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Qiuxian Qi
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Pengshuai Zhang
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yaobin Zhang
- School of Environmental Science and Technology, Dalian University of Technology, China
| | - Yen Wah Tong
- Department of Chemical & Biomolecular Engineering, National University of Singapore, Singapore
| | - Yiliang He
- China-UK Low Carbon College, Shanghai Jiao Tong University, Shanghai 200240, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
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8
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Park JG, Jiang D, Lee B, Jun HB. Towards the practical application of bioelectrochemical anaerobic digestion (BEAD): Insights into electrode materials, reactor configurations, and process designs. WATER RESEARCH 2020; 184:116214. [PMID: 32726737 DOI: 10.1016/j.watres.2020.116214] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/10/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Anaerobic digestion (AD) is one of the most widely adopted bioenergy recovery technologies globally. Despite the wide adoption, AD has been challenged by the unstable performances caused by imbalanced substrate and/or electron availability among different reaction steps. Bioelectrochemical anaerobic digestion (BEAD) is a promising concept that has demonstrated potential for balancing the electron transfer rates and enhancing the methane yield in AD during shocks. While great progress has been made, a wide range of, and sometimes inconsistent engineering and technical strategies were attempted to improve BEAD. To consolidate past efforts and guide future development, a comprehensive review of the fundamental bioprocesses in BEAD is provided herein, followed by a critical evaluation of the engineering and technical optimizations attempted thus far. Further, a few novel directions and strategies that can enhance the performance and practicality of BEAD are proposed for future research to consider. This review and outlook aim to provide a fundamental understanding of BEAD and inspire new research ideas in AD and BEAD in a mechanism-informed fashion.
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Affiliation(s)
- Jun-Gyu Park
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea; Department of Environmental Engineering, Montana Technological University, Butte, MT 59701, USA
| | - Daqian Jiang
- Department of Environmental Engineering, Montana Technological University, Butte, MT 59701, USA
| | - Beom Lee
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea; Nature Engineering Co., LTD., 1 Chungdae-ro, Cheongju 28644, Republic of Korea
| | - Hang-Bae Jun
- Department of Environmental Engineering, Chungbuk National University, Cheongju 28644, Republic of Korea.
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Ahmad HA, Ni SQ, Ahmad S, Zhang J, Ali M, Ngo HH, Guo W, Tan Z, Wang Q. Gel immobilization: A strategy to improve the performance of anaerobic ammonium oxidation (anammox) bacteria for nitrogen-rich wastewater treatment. BIORESOURCE TECHNOLOGY 2020; 313:123642. [PMID: 32536456 DOI: 10.1016/j.biortech.2020.123642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Anaerobic ammonium oxidation (anammox) process appears a suitable substitute to nitrification-denitrification at a lower C/N ratios. Anammox is a chemolithoautotrophic process, belong to phylum Planctomycetes, and they are slow growing bacteria. Different strategies, e.g., biofilm formation, granulation and gel immobilization, have been applied to maintain a critical mass of bacterial cells in the system by avoiding washout from the bioreactor. Gel immobilization of anammox appears the best alternative to the natural process of biofilm formation and granulation. Polyvinyl alcohol-sodium alginate, polyethylene glycol, and waterborne polyurethane are the most reported materials used for the entrapment of anammox bacteria. However, dissolution of the gel beads refrains its application for long term bioprocess. Magnetic powder could coat on the surface of the beads which may increase the mechanical strength and durability of pellets. Application and problem of immobilization technology for the commercialization of this technology also addressed.
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Affiliation(s)
- Hafiz Adeel Ahmad
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Shou-Qing Ni
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China.
| | - Shakeel Ahmad
- Department of Soil and Environmental Sciences, Muhammad Nawaz Shareef University of Agriculture, Multan, Pakistan
| | - Jian Zhang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, China
| | - Muhammad Ali
- King Abdullah University of Science and Technology, Water Desalination and Reuse Center, Thuwal 23955-6900, Saudi Arabia
| | - Huu Hao Ngo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Wenshan Guo
- School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia
| | - Zuwan Tan
- China Gezhouba Group Co., Ltd. & China Gezhouba Group Three Gorges Construction Engineering Co., Ltd., Yichang, China
| | - Qi Wang
- Shandong Hongda Construction Engineering Co., Ltd., Jinan, China
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17 beta-estradiol biodegradation by anaerobic granular sludge: Effect of iron sources. Sci Rep 2020; 10:7777. [PMID: 32385383 PMCID: PMC7210892 DOI: 10.1038/s41598-020-64557-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 03/26/2020] [Indexed: 12/05/2022] Open
Abstract
Steroid estrogens, as typical endocrine disrupting chemicals (EDCs), have raised an increasing concern due to their endocrine disrupting effects on aquatic animals and potential hazards on human health. Batch experiments were conducted to study 17 beta-estradiol (E2) removal and Estradiol Equivalent Quantity (EEQ) elimination by anaerobic granular sludge (AnGS) combined with different valence iron sources. Results showed that E2 was effectively biodegraded and transformed into E1 by AnGS. The addition of different valence iron sources all promoted E2 degradation, reduced E2 Equivalent Quotient (EEQ) concentration, and increased methane production in the batch experiments. The enhancement effect of zero-valent iron (ZVI) on E2 removal and EEQ elimination was stronger than that of Fe2+ and Fe3+ in our experiments. The enhancement effect proportion of ZVI corrosion, Fe2+, and Fe3+ in the process of E2 degradation by AnGS combined with ZVI were 42.26%, 40.21% and 17.53%, respectively.
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He C, Lin W, Zheng X, Wang C, Hu Z, Wang W. Synergistic effect of magnetite and zero-valent iron on anaerobic degradation and methanogenesis of phenol. BIORESOURCE TECHNOLOGY 2019; 291:121874. [PMID: 31377508 DOI: 10.1016/j.biortech.2019.121874] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/20/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
Anaerobic digestion is widely employed for treating phenol-containing wastewater, but there are still some drawbacks such as slow phenol degradation rate and vulnerable acetoclastic methanogens. Coupling of magnetite (Fe3O4) and zero valent iron (ZVI) was firstly used to enhance anaerobic digestion of phenol. The results indicated an obvious synergistic effect was generated with coupling of Fe3O4 and ZVI during the whole anaerobic digestion of phenol. The phenol degradation rate and methane production of Fe3O4/ZVI-added group were increased by 8.8-23.1% and 11.9-31.6%, respectively compared with Fe3O4-added group, and enhanced by 5.9-17.1% and 4.4-18.3%, respectively compared with ZVI-added group. ZVI improved the growth of hydrogenotrophic methanogens and Fe3O4 enhanced the growth of syntrophic acetate-oxidizing bacteria. Finally, the syntrophic interaction between acetate-oxidizing bacterium and hydrogenotrophic methanogens played a vital role on the synergistic effect of Fe3O4 and ZVI on the whole anaerobic phenol digestion.
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Affiliation(s)
- Chunhua He
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Weishi Lin
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Xiaohao Zheng
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Chuanya Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Zhenhu Hu
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China
| | - Wei Wang
- Department of Municipal Engineering, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China.
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12
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Yang G, Wang J, Zhang H, Jia H, Zhang Y, Gao F. Applying bio-electric field of microbial fuel cell-upflow anaerobic sludge blanket reactor catalyzed blast furnace dusting ash for promoting anaerobic digestion. WATER RESEARCH 2019; 149:215-224. [PMID: 30447526 DOI: 10.1016/j.watres.2018.10.091] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 10/28/2018] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
In this study, a novel manner of bio-electric field (BEF) which generated by upflow anaerobic sludge blanket (UASB)-microbial fuel cell (MFC) integrated system facilitated iron-carbon micro-electrolysis in blast furnace dusting ash (BFDA) was proposed for the reinforcement of anaerobic digestion in UASB. The responses of COD removal efficiency and biogas production with (0.1-0.4 V) BEF catalyzed 5 g BFDA(RMFC-5gBFDA-UASB) were much higher than the other tests, and maximum reached 86% and 240 ml/d respectively. Ultra-fast acidogenesis was achieved with 0.3 V BEF supplied to BFDA and the time shortened 94 h compared controlled (RUASB) with RMFC-5gBFDA-UASB. With the electrochemical and microbial community analysis, the redox ability and direct interspecies electron transfer accumulated with BEF catalyzed. The abundance of Firmicutes which could generate bio-hydrogen was highest in RMFC-5gBFDA-UASB (44.58%) compared to RUASB (31.36%) and R5gBFDA-UASB (40.04%). In addition, the structure and morphology variation of BFDA revealed that the synergistic effects of BEF stimulated iron-carbon micro-electrolysis for electron transferring and enhanced the activities of methanogens and acetogens with high relative abundance to biotransform organic compounds, as well as adsorption and precipitation of iron oxides (hematite and magnetite) promoting anaerobic digestion. The MFC-BFDA-UASB integrated system provides a promising and cost-effective way to enhance anaerobic digestion and recycled functionalized waste effectively.
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Affiliation(s)
- Guang Yang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Jie Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China; School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, 300387, China.
| | - Hongwei Zhang
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China.
| | - Hui Jia
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China; School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Yang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China
| | - Fei Gao
- School of Environmental Science and Engineering, Tianjin University, Tianjin, 300072, China; State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin, 300387, China
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Wang S, Zhou A, Zhang J, Liu Z, Zheng J, Zhao X, Yue X. Enhanced quinoline removal by zero-valent iron-coupled novel anaerobic processes: performance and underlying function analysis. RSC Adv 2019; 9:1176-1186. [PMID: 35518020 PMCID: PMC9059619 DOI: 10.1039/c8ra09529a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 12/19/2018] [Indexed: 12/03/2022] Open
Abstract
Quinoline is toxic and difficult to degrade biologically; thus, it is a serious threat to the safety of ecosystems. To promote quinoline reduction, zero-valent iron (ZVI) was introduced into an anaerobic digestion (AD) system through batch experiments. The performance of three different types of ZVI (i.e., iron powder, iron scrap and rusty iron scrap) on quinoline degradation, methane production, formation of volatile fatty acids (VFAs) and chemical oxygen demand (COD) removal were investigated systematically. Compared to the AD system alone, quinoline and COD removal as well as the production of methane and acetic acid were effectively enhanced by ZVI, especially rusty iron scrap. The removal efficiencies of quinoline and COD were increased by 28.6% and 19.9%, respectively. The enhanced effects were attributed to the high accumulation of ferrous ions and high pH self-buffering capability, which were established by ZVI addition. Furthermore, high-throughput sequencing analysis indicated that the functional microorganisms in the ZVI-AD system were higher than in the AD system, and the added types of ZVI played important roles in structuring the innate microbial community in waste activated sludge (WAS). Especially, high enrichment of microorganisms capable of degrading quinoline, such as Pseudomonas and Bacillus, in the coupled system was detected.
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Affiliation(s)
- Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Jiaguang Zhang
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Zhaohua Liu
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Jierong Zheng
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Xiaochan Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
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14
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Vyrides I, Andronikou M, Kyprianou A, Modic A, Filippeti A, Yiakoumis C, Samanides CG. CO2 conversion to CH4 using Zero Valent Iron (ZVI) and anaerobic granular sludge: Optimum batch conditions and microbial pathways. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2018.08.023] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Jiang X, Chen Y, Hou C, Liu X, Ou C, Han W, Sun X, Li J, Wang L, Shen J. Promotion of Para-Chlorophenol Reduction and Extracellular Electron Transfer in an Anaerobic System at the Presence of Iron-Oxides. Front Microbiol 2018; 9:2052. [PMID: 30214440 PMCID: PMC6125335 DOI: 10.3389/fmicb.2018.02052] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 08/13/2018] [Indexed: 01/10/2023] Open
Abstract
Anaerobic dechlorination of chlorophenols often subjects to their toxicity and recalcitrance, presenting low loading rate and poor degradation efficiency. In this study, in order to accelerate p-chlorophenol (p-CP) reduction and extracellular electron transfer in an anaerobic system, three iron-oxide nanoparticles, namely hematite, magnetite and ferrihydrite, were coupled into an anaerobic system, with the performance and underlying role of iron-oxide nanoparticles elucidated. The reductive dechlorination of p-CP was notably improved in the anaerobic systems coupled by hematite and magnetite, although ferrihydrite did not plays a positive role. Enhanced dechlorination of p-CP in hematite or magnetite coupled anaerobic system was linked to the obvious accumulation of acetate, lower oxidation-reduction potential and pH, which were beneficial for reductive dechlorination. Electron transfer could be enhanced by Fe2+/Fe3+ redox couple on the iron oxides surface formed through dissimilatory iron-reduction. This study demonstrated that the coupling of iron-oxide nanoparticles such as hematite and magnetite could be a promising alternative to the conventional anaerobic reduction process for the removal of CPs from wastewater.
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Affiliation(s)
- Xinbai Jiang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Yuzhe Chen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Chen Hou
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Xiaodong Liu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Changjin Ou
- School of Chemistry and Chemical Engineering, Nantong University, Nantong, China
| | - Weiqing Han
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Xiuyun Sun
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Jiansheng Li
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Lianjun Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Jinyou Shen
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, China
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16
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Wilmoth JL, Doak PW, Timm A, Halsted M, Anderson JD, Ginovart M, Prats C, Portell X, Retterer ST, Fuentes-Cabrera M. A Microfluidics and Agent-Based Modeling Framework for Investigating Spatial Organization in Bacterial Colonies: The Case of Pseudomonas Aeruginosa and H1-Type VI Secretion Interactions. Front Microbiol 2018; 9:33. [PMID: 29467721 PMCID: PMC5808251 DOI: 10.3389/fmicb.2018.00033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 01/09/2018] [Indexed: 12/17/2022] Open
Abstract
The factors leading to changes in the organization of microbial assemblages at fine spatial scales are not well characterized or understood. However, they are expected to guide the succession of community development and function toward specific outcomes that could impact human health and the environment. In this study, we put forward a combined experimental and agent-based modeling framework and use it to interpret unique spatial organization patterns of H1-Type VI secretion system (T6SS) mutants of P. aeruginosa under spatial confinement. We find that key parameters, such as T6SS-mediated cell contact and lysis, spatial localization, relative species abundance, cell density and local concentrations of growth substrates and metabolites are influenced by spatial confinement. The model, written in the accessible programming language NetLogo, can be adapted to a variety of biological systems of interest and used to simulate experiments across a broad parameter space. It was implemented and run in a high-throughput mode by deploying it across multiple CPUs, with each simulation representing an individual well within a high-throughput microwell array experimental platform. The microfluidics and agent-based modeling framework we present in this paper provides an effective means by which to connect experimental studies in microbiology to model development. The work demonstrates progress in coupling experimental results to simulation while also highlighting potential sources of discrepancies between real-world experiments and idealized models.
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Affiliation(s)
- Jared L Wilmoth
- Oak Ridge National Laboratory, Biosciences Division, Oak Ridge, TN, United States
| | - Peter W Doak
- Computational Sciences and Engineering Division, Oak Ridge, TN, United States
| | - Andrea Timm
- Oak Ridge National Laboratory, Biosciences Division, Oak Ridge, TN, United States
| | - Michelle Halsted
- The Bredesen Center, University of Tennessee, Knoxville, TN, United States
| | - John D Anderson
- The Bredesen Center, University of Tennessee, Knoxville, TN, United States
| | - Marta Ginovart
- Department of Mathematics, Universitat Politecnica de Catalunya, Barcelona, Spain
| | - Clara Prats
- Department of Physics, Universitat Politecnica de Catalunya, Barcelona, Spain
| | - Xavier Portell
- School of Water, Energy and Environment, Cranfield University, Cranfield, United Kingdom
| | - Scott T Retterer
- Oak Ridge National Laboratory, Biosciences Division, Oak Ridge, TN, United States.,Computational Sciences and Engineering Division, Oak Ridge, TN, United States
| | - Miguel Fuentes-Cabrera
- Computational Sciences and Engineering Division, Oak Ridge, TN, United States.,Computational Sciences and Engineering Division, Oak Ridge, TN, United States
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17
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Hao X, Wei J, van Loosdrecht MCM, Cao D. Analysing the mechanisms of sludge digestion enhanced by iron. WATER RESEARCH 2017; 117:58-67. [PMID: 28390236 DOI: 10.1016/j.watres.2017.03.048] [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: 12/19/2016] [Revised: 02/05/2017] [Accepted: 03/23/2017] [Indexed: 06/07/2023]
Abstract
Carbon-neutral operation of wastewater treatment plants (WWTPs) requires enhancing anaerobic digestion (AD) of excess sludge for a higher energy conversion efficiency. Among others, iron has been identified to function on enhancing methane production in AD. As an industrial residual, waste iron scraps (WISs) have been reported as potentially enhancing CH4 production in AD. With this study, the mechanisms of AD enhanced by WISs are analysed in a two-phase process: acidogenic phase (AP) and methanogenic phase (MP). Semi-continuous tests substantially excluded ORP reduction and hydrogen-evolution corrosion induced by WISs in enhancing CH4 production, although WISs (10 g Fe/L) could indeed increase CH4 production by 10.1% and 21.4% when added in AP and MP respectively. Detection on both FISH and enzymatic activities of involved microorganisms revealed that the stimulating effects of WISs on anaerobes (both catabolism and anabolism) could play an important (96.3%) role in enhancing CH4 production, which would facilitate hydrolysis of refractory organics and improvement of electron transport rate (ETR).
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Affiliation(s)
- Xiaodi Hao
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering & Architecture, Beijing 100044, PR China.
| | - Jing Wei
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering & Architecture, Beijing 100044, PR China
| | - Mark C M van Loosdrecht
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering & Architecture, Beijing 100044, PR China; Dept. of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ Delft, The Netherlands
| | - Daqi Cao
- Sino-Dutch R&D Centre for Future Wastewater Treatment Technologies/Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering & Architecture, Beijing 100044, PR China
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18
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Wang D, Ma W, Han H, Li K, Xu H, Fang F, Hou B, Jia S. Enhanced anaerobic degradation of Fischer-Tropsch wastewater by integrated UASB system with Fe-C micro-electrolysis assisted. CHEMOSPHERE 2016; 164:14-24. [PMID: 27573211 DOI: 10.1016/j.chemosphere.2016.08.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Revised: 08/06/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
Coupling of the Fe-C micro-electrolysis (IC-ME) into the up-flow anaerobic sludge blanket (UASB) was developed for enhanced Fischer-Tropsch wastewater treatment. The COD removal efficiency and methane production in R3 with IC-ME assisted both reached up to 80.6 ± 1.7% and 1.38 ± 0.11 L/L·d that higher than those values in R1 with GAC addition (63.0 ± 3.4% and 0.95 ± 0.09 L/L·d) and R2 with ZVI addition (74.5 ± 2.8% and 1.21 ± 0.09 L/L·d) under the optimum HRT (5 d). The Fe corrosion as electron donor reduced the ORP values and stimulated the activities of hydrogenotrophic methanogens to lower H2 partial pressure in R2 and R3. Additionally, Fe2+ as by-product of iron corrosion, its presence could effectively increase the percentage of protein content in tightly bound extracellular polymeric substances (TB-EPS) to promote better bioflocculation, increasing to 90.5 mg protein/g·VSS (R2) and 106.3 mg protein/g·VSS (R3) while this value in R1 was simply 56.6 mg protein/g·VSS. More importantly, compared with R1, the excess accumulation of propionic acid and butyric acid in system was avoided. The macroscopic galvanic cells around Fe-C micro-electrolysis carriers in R3, that larger than microscopic galvanic cells in R2, further accelerate to transfer the electrons from anodic Fe to cathodic carbon that enhance interspecies hydrogen transfer, making the decomposition of propionic acid and butyric acid more thermodynamically feasible, finally facilitate more methane production.
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Affiliation(s)
- Dexin Wang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Wencheng Ma
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hongjun Han
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Kun Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Hao Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Fang Fang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Baolin Hou
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Shengyong Jia
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
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19
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Cao Z, Zhang M, Zhang J, Zhang H. Impact of continuous and intermittent supply of electric assistance on high-strength 2,4-dichlorophenol (2,4-DCP) degradation in electro-microbial system. BIORESOURCE TECHNOLOGY 2016; 212:138-143. [PMID: 27092992 DOI: 10.1016/j.biortech.2016.03.165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Revised: 03/30/2016] [Accepted: 03/31/2016] [Indexed: 06/05/2023]
Abstract
The high-strength 2,4-DCP, which exists in two states: dissolved and colloidal, was studied by a continuously electro-microbial system (CEMS) and an intermittently electro-microbial system (IEMS). The hydrolysis rate of colloidal 2,4-DCP in the IEMS without electric assistance was much higher than that in the CEMS. However, the degradation rate of the dissolved 2,4-DCP and the dissolved intermediates (2-chlorophenol and 4-chlorophenol) in the IEMS without electric assistance were much lower than that in the CEMS. By adjusting the intermittent operation mode, the degradation time of 2,4-DCP was shortened greatly. Microbial characteristics in the CEMS and the IEMS were different. The correlation analysis for the main factors affecting the hydrolysis was performed by SPSS, and it was found that the correlation coefficient (rp) was -0.912 for extracellular polymeric substances (EPS) content, 0.823 for zeta potential and 0.632 for relative hydrophobicity, respectively.
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Affiliation(s)
- Zhanping Cao
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Minghui Zhang
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - Jingli Zhang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China
| | - Hongwei Zhang
- School of Environmental and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
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20
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Chen H, Chen QQ, Jiang XY, Hu HY, Shi ML, Jin RC. Insight into the short- and long-term effects of Cu(II) on denitrifying biogranules. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:448-456. [PMID: 26610098 DOI: 10.1016/j.jhazmat.2015.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 10/16/2015] [Accepted: 11/08/2015] [Indexed: 06/05/2023]
Abstract
This study aimed to investigate the short- and long-term effects of Cu(2+) on the activity and performance of denitrifying bacteria. The short-term effects of various concentrations of Cu(2+) on the denitrifying bacteria were evaluated using batch assays. The specific denitrifying activity (SDA) decreased from 14.3 ± 2.2 (without Cu(2+)) to 6.1 ± 0.1 mg N h(-1)g(-1) VSS (100 mg Cu(2+)L(-1)) when Cu(2+) increased from 0 to 100 mg L(-1) with an increment of 10 mg Cu(2+)L(-1). A non-competitive inhibition model was used to calculate the 50% inhibition concentration (IC50) of Cu(2+) on denitrifying sludge (30.6 ± 2.5 mg L(-1)). Monod and Luong models were applied to investigate the influence of the initial substrate concentration, and the results suggested that the maximum substrate removal rate would be reduced with Cu(2+) supplementation. Pre-exposure to Cu(2+) could lead to an 18.2-46.2% decrease in the SDA and decreasing percentage of the SDA increased with both exposure time and concentration. In the continuous-flow test, Cu(2+) concentration varied from 1 to 75 mg L(-1); however, no clear deterioration was observed in the reactor, and the reactor was kept stable, with the total nitrogen removal efficiency and total organic carbon efficiency greater than 89.0 and 85.0%, respectively. The results demonstrated the short-term inhibition of Cu(2+) upon denitrification, and no notable adversity was observed during the continuous-flow test after long-term acclimation.
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Affiliation(s)
- Hui Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China
| | - Qian-Qian Chen
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China
| | - Xiao-Yan Jiang
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China
| | - Hai-Yan Hu
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Man-Ling Shi
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Ren-Cun Jin
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
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