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Correa CZ, de Tavares Machado Bolonhesi IB, Lopes DD, Prates KVMC, Panagio LA, Ratuchne A, Damianovic MHRZ. Removal of organic matter and nitrogen from dairy effluents in a structured bed reactor operated with intermittent aeration. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:91060-91073. [PMID: 37464210 DOI: 10.1007/s11356-023-28581-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 06/29/2023] [Indexed: 07/20/2023]
Abstract
The objective of this research was to evaluate the performance of a structured bed reactor (SBRIA), carried out with intermittent aeration (IA), in the removal of organic matter and nitrogen from dairy effluent, when run with different organic loading rates (OLR). The SBRIA was operated for 227 days, with 2:1 AI cycles (2 h with aeration on and 1 h off) and Hydraulic Retention Time (HRT) of 16 h. Three phases, with different OLR, were evaluated: phases A (1000 gCOD m-3 day-1 - 63 days), B (1400 gCOD m-3 day-1 - 94 days), and C (1800 gCOD m-3 day-1 - 70 days). The percentage of COD, NH4+-N removal, and nitrogen removal, respectively, were above 85 ± 7%, 73 ± 27%, and 83 ± 5, in all phases. There was no accumulation of the oxidized forms of nitrogen in the reactor. The kinetic test, performed to evaluate the nitrification and denitrification in the system, indicated that even in dissolved oxygen concentrations of 4.5 mg L-1, it was possible to obtain the denitrification process in the system. The results demonstrate that the reactor under study has positive characteristics to be used as an alternative for removing the removal of organic material and nitrogen in the biological treatment of dairy effluents.
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Affiliation(s)
- Camila Zoe Correa
- Department of Civil Construction, State University of Londrina, Rodovia Celso Garcia Cid, Km 380, Campus Universitario, CEP, Londrina, Parana, 86057-970, Brazil.
| | | | - Deize Dias Lopes
- Department of Civil Construction, State University of Londrina, Rodovia Celso Garcia Cid, Km 380, Campus Universitario, CEP, Londrina, Parana, 86057-970, Brazil
| | - Kátia Valéria Marques Cardoso Prates
- Department of Environmental Engineering, Federal Technological University of Paraná, Av. Dos Pioneiros 3131, Londrina, Parana, CEP 86036-370, Brazil
| | - Luciano Aparecido Panagio
- Department of Microbiology, State University of Londrina, Rodovia Celso Garcia Cid, Km 380, Campus Universitario, Londrina, Parana, CEP 86057-970, Brazil
| | - Aline Ratuchne
- Department of Microbiology, State University of Londrina, Rodovia Celso Garcia Cid, Km 380, Campus Universitario, Londrina, Parana, CEP 86057-970, Brazil
| | - Márcia Helena Rissato Zamariolli Damianovic
- Laboratory of Biological Processes, São Carlos School of Engineering, University of São Paulo (USP), 1100, João Dagnone Ave., Santa Angelina, Sao Carlos, São Paulo, 13563-120, Brazil
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Bouanga Boudiombo JS, Madden DG, Cusack B, Cronin P, Ryan A. State of the art and prospects of zeolites and metal organic frameworks (MOFs) for nitrogen and phosphorus removal in dairy wastewater. CHEMOSPHERE 2023; 329:138531. [PMID: 37004818 DOI: 10.1016/j.chemosphere.2023.138531] [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: 10/07/2022] [Revised: 03/19/2023] [Accepted: 03/26/2023] [Indexed: 05/03/2023]
Abstract
Water is an essential resource for humans, animals, and plants. Water is also necessary for the manufacture of many products such as milk, textiles, paper, and pharmaceutical composites. During manufacturing, some industries generate a large amount of wastewater containing numerous contaminants. In the dairy industry, for each litre of drinking milk produced, about 10 L of wastewater is generated. Despite this environmental footprint, the production of milk, butter, ice cream, baby formula, etc., are essential in many households. Common contaminants in dairy wastewater include high biological oxygen demand (BOD), chemical oxygen demand (COD), salts as well as nitrogen and phosphorus derivatives. Nitrogen and phosphorus discharges are one of the leading causes in the eutrophication of rivers and oceans. Porous materials have long held significant potential as a disruptive technology for wastewater treatment. However, thus far they have been understudied for use in dairy wastewater treatment. Ordered porous materials, such as zeolites and metal organic frameworks (MOFs), represent classes of porous materials with significant potential for the removal of nitrogen and phosphorus. This review explores the different zeolites and MOFs applied in the removal of nitrogen and phosphorus from wastewater and the prospect of their potential for use in wastewater management in the dairy industry.
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Affiliation(s)
- Jacky S Bouanga Boudiombo
- Dairy Processing Technology Centre (DPTC), Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland.
| | - David G Madden
- Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Ben Cusack
- Dairy Processing Technology Centre (DPTC), Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Patrick Cronin
- Dairy Processing Technology Centre (DPTC), Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
| | - Alan Ryan
- Dairy Processing Technology Centre (DPTC), Bernal Institute, University of Limerick, Limerick, V94 T9PX, Ireland
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3
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Yazdanbakhsh A, Rafiee M, Mohammadi Z. Responses of activated sludge under a short-term exposure to facial scrub microbeads: implications from treatment performance and higher-life microbial population dynamics. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2023; 87:3031-3046. [PMID: 37387428 PMCID: wst_2023_183 DOI: 10.2166/wst.2023.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
In this study, four identical laboratory-scale sequencing batch reactors (SBRs) were continuously operated with different concentrations of microbeads (MBs) (5,000-15,000 MBs/L) to investigate the stress-responses of activated sludge under the MB exposure. It was found that the overall treatment performance (organic removal) of SBRs was fairly affected by short-term exposure to low levels of MBs; however, it was adversely affected as the concentration of MBs increased. The average concentration of mixed liquor suspended solids and heterotrophic bacteria in the reactor fed with 15,000 MBs/L were 16 and 30% less than in the pristine control reactor, respectively. Batch experiments further demonstrated that fairly low concentrations of MBs favored the development of dense microbial structures. Further increasing the MB concentrations to 15,000 MBs/L, however, distinctly weakened the settling performance of sludge. Morphological observations revealed suppressed uniformity, strength, and integrity of flocs reactors with the addition of MBs. Microbial community analyses revealed that the abundance of protozoan species declined 37.5, 58, and 64%, respectively, when SBRs were exposed to 5,000; 10,000; and 15,000 MBs/L as compared with the control reactor. The present work provided new insight into the possible effects of MBs on the performances and operational parameters of activated sludge.
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Affiliation(s)
- Ahmadreza Yazdanbakhsh
- Workplace Health Promotion Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran E-mail:
| | - Mohammad Rafiee
- Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Mohammadi
- Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Xiao N, Wang B, Huang JJ, Huang Z, Shi L. Aeration strategy based on numerical modelling and the response mechanism of microbial communities under various operating conditions. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 310:114752. [PMID: 35231691 DOI: 10.1016/j.jenvman.2022.114752] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 02/10/2022] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Aeration system is the main energy consumer in a wastewater treatment process. In this paper, the Naive Bayes classification (NBC) algorithm and response surface method (RSM) were firstly used to establish a methodology to improve the aeration efficiency and estimate effluent quality. Lab-scale experiments were conducted to verify the model. The errors between experimental values and predicted values were 3.36, -0.67 and -3.78% at operating temperatures of 20, 30 and 35 °C, indicating the applicability. To further elucidate the biological mechanisms of the experimental results, the microbial community composition was investigated under various operating conditions, the results shows that aerobic heterotrophic bacteria (HET) activity and COD removal efficiency were promoted at 30 °C. AOB and NOB activity and NH4+-N removal efficiency were promoted at 30-35 °C. These findings together suggest that operating temperature is crucial for activated sludge treatment, which should be considered when regulating DO content or aeration rate in practical application.
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Affiliation(s)
- Nan Xiao
- College of Environmental Science and Engineering/Sino-Canada Joint R&D Centre on Water and Environmental Safety, Nankai University, Tianjin, 300071, PR China
| | - Bing Wang
- College of Environmental Science and Engineering/Sino-Canada Joint R&D Centre on Water and Environmental Safety, Nankai University, Tianjin, 300071, PR China
| | - Jeanne Jinhui Huang
- College of Environmental Science and Engineering/Sino-Canada Joint R&D Centre on Water and Environmental Safety, Nankai University, Tianjin, 300071, PR China.
| | - Zhiyong Huang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, PR China
| | - Liuyang Shi
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, PR China
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Li Y, Wu J, Liu Y, Chen F, Guan J, Shao Y, Wang J, Zhang L, Goel R, Sun X, Wang Q, Zhang R, Song H, Liu B. The effect of sludge retention time (SRT) on the Nitrifier typical kinetics at ambient temperature under the low ammonia density. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 85:617-632. [PMID: 35100143 DOI: 10.2166/wst.2021.624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Sludge retention time (SRT) regulation is one of the essential management techniques for refined control of the main-sidestream treatment process under the low ammonia density. It is indispensable to understand the effect of SRTs changes on the Nitrifier kinetics to obtain the functional separation of the Nitrifier and the refined control of the nitrification process. In this study, Nitrifier was cultured with conditions of 35 ± 0.5 °C, pH 7.5 ± 0.2, DO 5.0 ± 0.5 mg-O/L, and SRTs were controlled for 40 d, 20 d, 10 d, and 5 d. The net growth rate (μm), decay rate (b), specific growth rate (μ), the yield of the Nitrifier (YA), temperature parameter (TA), and inhibition coefficient (KI) have been measured and extended with the SRT decreases. Instead, the half-saturation coefficient (KS) decreased. In addition, the limited value of pH inhibition occurs (pHUL), and the pH of keeping 5% maximum reaction rate (pHLL) was in a relatively stable state. The trade of kinetics may be induced by the change of species structure of Nitrifier. The Nitrosomonas proportion was increased, and the Nitrospira was contrary with the SRT decreasing. It is a match for the functional separation of Nitrifier when SRTs was 20 d at ambient temperature under the low ammonia density. The kinetics of ammonia-oxidizing organisms (AOO) and nitrite-oxidizing organisms (NOO) in Nitrifier under different SRT conditions should be measured respectively to the refined control of the partial nitrification process in future study.
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Affiliation(s)
- Yifan Li
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail: ; These authors contributed equally to this work and should be considered co-first authors
| | - Jinzhu Wu
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail: ; These authors contributed equally to this work and should be considered co-first authors
| | - Yongjie Liu
- Shandong Institute for Product Quality Inspection, Jinan, 250102, China
| | - Feiyong Chen
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
| | - Jie Guan
- Shandong Institute for Product Quality Inspection, Jinan, 250102, China
| | - Yuanyuan Shao
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
| | - Jing Wang
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
| | - Lijie Zhang
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
| | - Rajeev Goel
- Hydromantis Environmental Software Solutions, Inc., 407 King Street West, Hamilton, Ontario, Canada
| | - Xiuqin Sun
- Nuclear Engineering Lihua Technology Engineering Co. Ltd, Beijing, China
| | - Quanyong Wang
- Shandong Branch of China Urban Construction Research Institute, No. 1299, Xinluo Street, Jinan, China
| | - Ruina Zhang
- Shanghai Environmental & Sanitary Engineering Design Institute Co., Ltd, No.11, 345 Lane, Shilong RD, Shanghai, China
| | - Hengyu Song
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
| | - Bing Liu
- Resources and Environment Innovation Institute, School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan 250101, China E-mail:
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Khodadad Hosseini E, Derakhshi P, Rabbani M, Mooraki N. Pollutant removal from dairy wastewater using live Azolla filiculoides in batch and continuous bioreactors. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:2122-2134. [PMID: 34013663 DOI: 10.1002/wer.1586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 05/02/2021] [Accepted: 05/13/2021] [Indexed: 06/12/2023]
Abstract
Fast and proper treatment of dairy wastewater is necessary before discharging it to the environment. In this study, healthy Azolla filiculoides was used to remove pollutants, including phosphorus (P), sodium (Na), chemical oxygen demand (COD), biological oxygen demand (BOD), and total dissolved solids (TDS) of dairy effluent in batch, continuous system, as well as continuous with the slow stirring system. These systems were handmade. The maximum removal efficiency was related to the P, which obtained 66.25% after 12 h in the batch bioreactor system. The highest removal of 13.69% after 21 h was obtained for Na using continuous with a slow stirring method. The highest removal related to the COD and BOD was 33.53% and 29.93% after 18 h, respectively, in continuous with the slow stirring system. TDS removal was achieved 31.44% after 24 h using the batch system. The results of these three systems were compared with each other using a one-way analysis of variance (ANOVA). There was no significant difference between them. Azolla filiculoides is an abundant plant in northern nature that a biosystem was used for optimum usage. It can be used as an efficient, inexpensive, and affordable bioadsorbent for dairy wastewater treatment. PRACTITIONER POINTS: Live Azolla filiculoides was used to remove pollutants. P, Na, BOD, COD, and TDS were removed from dairy wastewater. Batch, continuous, and continuous with the slow stirring systems were used. Live Azolla was an efficient, inexpensive, and affordable bio-adsorbent for dairy wastewater treatment.
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Affiliation(s)
| | - Pirouz Derakhshi
- Department of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Mohammad Rabbani
- Department of Marine Chemistry, Faculty of Marine Sciences and Technology, North Tehran Branch, Islamic Azad University, Tehran, Iran
| | - Nargess Mooraki
- Department of Fisheries Science, Faculty of Marine Sciences and Technology, North Tehran Branch, Islamic Azad University, Tehran, Iran
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7
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Kinetic study and performance evaluation of an integrated two-phase fixed-film baffled bioreactor for bioenergy recovery from wastewater and bio-wasted sludge. RENEWABLE & SUSTAINABLE ENERGY REVIEWS 2020. [DOI: 10.1016/j.rser.2019.109674] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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8
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S-rGO/ZnS nanocomposite-mediated photocatalytic pretreatment of dairy wastewater to enhance aerobic digestion. KOREAN J CHEM ENG 2019. [DOI: 10.1007/s11814-019-0319-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Daneshvar E, Zarrinmehr MJ, Koutra E, Kornaros M, Farhadian O, Bhatnagar A. Sequential cultivation of microalgae in raw and recycled dairy wastewater: Microalgal growth, wastewater treatment and biochemical composition. BIORESOURCE TECHNOLOGY 2019; 273:556-564. [PMID: 30476864 DOI: 10.1016/j.biortech.2018.11.059] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 11/14/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
In this study, two cycles of mixotrophic and one cycle of heterotrophic cultivation of Scenedesmus quadricauda (freshwater) and Tetraselmis suecica (marine water) microalgae in dairy wastewater (DWW) were investigated. Dry weights of S. quadricauda and T. suecica were found to be 0.43 and 0.58 g/L after the first cycle and 0.36, and 0.65 g/L after the second cycle of mixotrophic cultivation, respectively. Chlorophyll a content of both microalgae in the first cycle was significantly higher than the second cycle. S. quadricauda removed 92.15% of total nitrogen, 100% of phosphate, 100% of sulfate and 76.77% of total organic carbon, after two cycles of cultivation. The dominant fatty acids during the first and second cycle of S. quadricauda and T. suecica cultivation were C18:1 and C18:3n-3, respectively. The results suggest that by reusing DWW in two consecutive cycles of microalgal cultivation, higher pollutants removal efficiency and microalgal biomass production can be achieved.
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Affiliation(s)
- Ehsan Daneshvar
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland.
| | - Mohammad Javad Zarrinmehr
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland; Department of Natural Resources, Isfahan University of Technology, Isfahan 8415683111, Iran
| | - Eleni Koutra
- Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
| | - Michael Kornaros
- Laboratory of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 26504 Patras, Greece; INVALOR: Research Infrastructure for Waste Valorization and Sustainable Management, 1 Karatheodori Str., University Campus, 26504 Patras, Greece
| | - Omidvar Farhadian
- Department of Natural Resources, Isfahan University of Technology, Isfahan 8415683111, Iran
| | - Amit Bhatnagar
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland
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Shen J, Huang G, An C, Song P, Xin X, Yao Y, Zheng R. Biophysiological and factorial analyses in the treatment of rural domestic wastewater using multi-soil-layering systems. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 226:83-94. [PMID: 30114576 DOI: 10.1016/j.jenvman.2018.08.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 07/25/2018] [Accepted: 08/01/2018] [Indexed: 06/08/2023]
Abstract
Multi-soil-layering (MSL) system was developed as an attractive alternative to traditional land-based treatment techniques. Within MSL system, the environmental cleanup capability of soil is maximized, while the soil microbial communities may also change during operation. This study aimed to reveal the nature of biophysiological changes in MSL systems during operation. The species diversity in soil mixture blocks was analyzed using Illumina HiSeq sequencing of the 16S rRNA gene. The interactive effects of operating factors on species richness, community diversity and bacteria abundance correlated with COD, N and P removal were revealed through factorial analysis. The results indicated the main factors, aeration, bottom submersion and microbial amendment, had different significant effects on microbial responses. The surface area and porosity of zeolites in permeable layers decreased due to the absorption of extracellular polymeric substances. The findings were applied for the design and building of a full-size MSL system in field and satisfied removal efficiency was achieved. The results of this study can help better understand the mechanisms of pollutant reduction within MSL systems from microbial insights. It will have important implications for developing appropriate strategies for operating MSL systems with high efficiency and less risks.
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Affiliation(s)
- Ju Shen
- MOE Key Laboratory of Resourcces and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - Guohe Huang
- Center for Energy, Environment and Ecology Research, UR-BNU, Beijing Normal University, Beijing, 100875, China.
| | - Chunjiang An
- Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Quebec, H3G 1M8, Canada
| | - Pei Song
- MOE Key Laboratory of Resourcces and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - Xiaying Xin
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, S4S 0A2, Canada
| | - Yao Yao
- Department of Environmental Engineering, Xiamen University of Technology, Xiamen, 361024, China
| | - Rubing Zheng
- MOE Key Laboratory of Resourcces and Environmental Systems Optimization, North China Electric Power University, Beijing, 102206, China
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Ma SJ, Ding LL, Hu HD, Ma HJ, Xu K, Huang H, Geng JJ, Ren HQ. Cell membrane characteristics and microbial population distribution of MBBR and IFAS with different dissolved oxygen concentration. BIORESOURCE TECHNOLOGY 2018; 265:17-24. [PMID: 29864733 DOI: 10.1016/j.biortech.2018.03.111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/20/2018] [Accepted: 03/23/2018] [Indexed: 06/08/2023]
Abstract
This paper investigated the influences of different dissolved oxygen (DO) concentration (0.71-1.32, 2.13-3.02 and 4.31-5.16 mg/L) on cell membrane characteristics and microbial population distribution of moving biofilm reactors. Two representative reactors, i.e., moving bed biofilm reactors and integrated fixed-film activated sludge were operated. Results indicated that both DO concentration of 0.71-1.32 mg/L and 4.31-5.16 mg/L could increase membrane lipid mobile fraction (49.4%-67.4%) of the microbes, however, through prompting the synthesis of branched fatty acids and unsaturated fatty acids, respectively. For the biofilms, the abundance of Bacteroidetes decreased and Actinobacteria increased with the increase of DO levels. The lowest EfOM content and the highest microbial diversities (1.14-1.52) was observed at DO of 2.13-3.02 mg/L. Redundancy analysis showed that changes of DO levels could alter cell membrane properties and bacterial community structures, and subsequently significantly influenced effluent organic matter composition of moving biofilm reactors.
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Affiliation(s)
- Si-Jia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Li-Li Ding
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hai-Dong Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hai-Jun Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hui Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Jin-Ju Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hong-Qiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.
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Yang S, Yao G. Simultaneous removal of concentrated organics, nitrogen and phosphorus nutrients by an oxygen-limited membrane bioreactor. PLoS One 2018; 13:e0202179. [PMID: 30161154 PMCID: PMC6116941 DOI: 10.1371/journal.pone.0202179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 07/30/2018] [Indexed: 01/29/2023] Open
Abstract
Simultaneous removal of organics, nitrogen and phosphorus was achieved in a bench-scale oxygen-limited membrane bioreactor (OLMBR). Due to the limited dissolved oxygen (~ 0.2 mg/L equilibrium concentration) and the increased sludge concentration associated with the hollow fiber membrane, the OLMBR was endowed with an excellent performance on the removal of multi-pollutants. The optimized removal efficiencies of COD, nitrogen (N), and total phosphorus (TP) were approximately 95.5%, 90.0% and 82.6%, respectively (COD/N/P = 500:10:1, influent loading = 5.0 kg COD·m-3·d-1, 35°C). Mass balance and bacterial community analysis indicated that the removal of organic carbon was mainly achieved by the methane production process (67.6%). Short-cut nitrification-denitrification (SCND) was observed as the primary denitrification process in the OLMBR, in which the concentrated organic compounds served as the electron donors for denitrification. Nitrosomonas was observed to be the predominant ammonium-oxidizing bacteria, while nitrite-oxidizing bacteria were almost absent in the microbial community as revealed by the high-throughput sequencing technique. In addition, Euryarchaeota and Candidatus, which were well associated with the process of denitrifying anaerobic methane oxidation, were also detected. Sludge absorption was the main route for TP removal in the OLMBR, and the production of PH3 gas also accounted for 19.4% of TP removal. This study suggested that the interception effect of hollow fiber membrane provided higher sludge concentration, therefore offering more bacteria for pollutant removal. The OLMBR can be used for simultaneous removal of highly concentrated organics and nutrients in livestock and poultry breeding wastewater.
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Affiliation(s)
- Shengyun Yang
- College of Architecture and Environment, Sichuan University, Chengdu, China
| | - Gang Yao
- College of Architecture and Environment, Sichuan University, Chengdu, China
- * E-mail:
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Rochman FF, Sheremet A, Tamas I, Saidi-Mehrabad A, Kim JJ, Dong X, Sensen CW, Gieg LM, Dunfield PF. Benzene and Naphthalene Degrading Bacterial Communities in an Oil Sands Tailings Pond. Front Microbiol 2017; 8:1845. [PMID: 29033909 PMCID: PMC5627004 DOI: 10.3389/fmicb.2017.01845] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2017] [Accepted: 09/08/2017] [Indexed: 11/13/2022] Open
Abstract
Oil sands process-affected water (OSPW), produced by surface-mining of oil sands in Canada, is alkaline and contains high concentrations of salts, metals, naphthenic acids, and polycyclic aromatic compounds (PAHs). Residual hydrocarbon biodegradation occurs naturally, but little is known about the hydrocarbon-degrading microbial communities present in OSPW. In this study, aerobic oxidation of benzene and naphthalene in the surface layer of an oil sands tailings pond were measured. The potential oxidation rates were 4.3 μmol L-1 OSPW d-1 for benzene and 21.4 μmol L-1 OSPW d-1 for naphthalene. To identify benzene and naphthalene-degrading microbial communities, metagenomics was combined with stable isotope probing (SIP), high-throughput sequencing of 16S rRNA gene amplicons, and isolation of microbial strains. SIP using 13C-benzene and 13C-naphthalene detected strains of the genera Methyloversatilis and Zavarzinia as the main benzene degraders, while strains belonging to the family Chromatiaceae and the genus Thauera were the main naphthalene degraders. Metagenomic analysis revealed a diversity of genes encoding oxygenases active against aromatic compounds. Although these genes apparently belonged to many phylogenetically diverse taxa, only a few of these taxa were predominant in the SIP experiments. This suggested that many members of the community are adapted to consuming other aromatic compounds, or are active only under specific conditions. 16S rRNA gene sequence datasets have been submitted to the Sequence Read Archive (SRA) under accession number SRP109130. The Gold Study and Project submission ID number in Joint Genome Institute IMG/M for the metagenome is Gs0047444 and Gp0055765.
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Affiliation(s)
- Fauziah F Rochman
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Andriy Sheremet
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Ivica Tamas
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada.,Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Alireza Saidi-Mehrabad
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada.,Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Joong-Jae Kim
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Xiaoli Dong
- Department of Biochemistry and Molecular Biology in the Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Department of Geoscience, University of Calgary, Calgary, AB, Canada
| | - Christoph W Sensen
- Department of Biochemistry and Molecular Biology in the Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.,Institute of Computational Biotechnology, Graz University of Technology, Graz, Austria
| | - Lisa M Gieg
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Peter F Dunfield
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
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14
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Siqueira-Castro ICV, Greinert-Goulart JA, Rossetto R, Guimarães JR, Franco RMB. Ciliated protozoa community of a combined UASB-activated sludge system in southeastern Brazil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:23804-23814. [PMID: 27623859 DOI: 10.1007/s11356-016-7591-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 09/02/2016] [Indexed: 06/06/2023]
Abstract
The aims of the present study were (1) to evaluate the abundance and taxonomic composition of ciliated protozoa in the activated sludge of a full-scale combined anaerobic-aerobic system operating in a tropical country and (2) to study the relationship between the effluent quality, the physicochemical variables, and the ciliates present in the operating system. The total ciliate fauna of the activated sludge of the Piçarrão Wastewater Treatment Plant (Piçarrão WWTP) was composed of 36 morphospecies belonging to 33 genera. These included 21 species observed in the activated sludge samples on the day of collection and 15 species found in cultures. The activated sludge of the Piçarrão WWTP contained a diversified ciliate community composed mainly of indicator organisms. The most frequently occurring morphospecies were Aspidisca cicada, Vorticella spp., Gastronauta aloisi, Acineria uncinata, and Epistylis plicatilis complex. These results showed that satisfactory operating conditions prevailed at the Piçarrão WWTP. In the combined UASB-activated sludge system, the presence of Aspidisca cicada suggests the occurrence of denitrification in the process while the presence of Acineria uncinata and G. alosi indicates the removal of carbonaceous organic matter.
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Affiliation(s)
| | - Juliane Araújo Greinert-Goulart
- Laboratório de Parasitologia, Departamento de Ciências Naturais, FURB, Campus I-Rua Antônio da Veiga, 140-Victor Konder, CEP 89012-900, Blumenau, SC, Brazil.
| | - Renato Rossetto
- Sociedade de Abastecimento de Água e Saneamento de Campinas, Campinas, SP, Brazil
| | - José Roberto Guimarães
- Laboratório de Processos Oxidativos, Faculdade de Engenharia Civil, UNICAMP, Campinas, SP, Brazil
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15
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Hirota K, Yokota Y, Sekimura T, Uchiumi H, Guo Y, Ohta H, Yumoto I. Bacterial communities in different locations, seasons and segments of a dairy wastewater treatment system consisting of six segments. J Environ Sci (China) 2016; 46:109-115. [PMID: 27521942 DOI: 10.1016/j.jes.2015.09.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/24/2015] [Accepted: 09/23/2015] [Indexed: 06/06/2023]
Abstract
A dairy wastewater treatment system composed of the 1st segment (no aeration) equipped with a facility for the destruction of milk fat particles, four successive aerobic treatment segments with activated sludge and a final sludge settlement segment was developed. The activated sludge is circulated through the six segments by settling sediments (activated sludge) in the 6th segment and sending the sediments beck to the 1st and 2nd segments. Microbiota was examined using samples from the non-aerated 1st and aerated 2nd segments obtained from two farms using the same system in summer or winter. Principal component analysis showed that the change in microbiota from the 1st to 2nd segments concomitant with effective wastewater treatment is affected by the concentrations of activated sludge and organic matter (biological oxygen demand [BOD]), and dissolved oxygen (DO) content. Microbiota from five segments (1st and four successive aerobic segments) in one location was also examined. Although the activated sludge is circulating throughout all the segments, microbiota fluctuation was observed. The observed successive changes in microbiota reflected the changes in the concentrations of organic matter and other physicochemical conditions (such as DO), suggesting that the microbiota is flexibly changeable depending on the environmental condition in the segments. The genera Dechloromonas, Zoogloea and Leptothrix are frequently observed in this wastewater treatment system throughout the analyses of microbiota in this study.
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Affiliation(s)
- Kikue Hirota
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan
| | - Yuji Yokota
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan
| | - Toru Sekimura
- ACT Corporation, 21-5 West-21 South-4, Obihiro 080-2471, Japan
| | - Hiroshi Uchiumi
- ACT Corporation, 21-5 West-21 South-4, Obihiro 080-2471, Japan
| | - Yong Guo
- Ibaraki University College of Agriculture, 3-21-1 Chuou, Ami-machi, Ibaraki, Japan
| | - Hiroyuki Ohta
- Ibaraki University College of Agriculture, 3-21-1 Chuou, Ami-machi, Ibaraki, Japan
| | - Isao Yumoto
- Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2-17-2-1 Tsukisamu-Higashi, Toyohira-ku, Sapporo 062-8517, Japan; Laboratory of Environmental Microbiology, Graduate School of Agriculture, Hokkaido University, Kita-ku, Sapporo 060-8589, Japan.
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16
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Ma SJ, Ding LL, Huang H, Geng JJ, Xu K, Zhang Y, Ren HQ. Effects of DO levels on surface force, cell membrane properties and microbial community dynamics of activated sludge. BIORESOURCE TECHNOLOGY 2016; 214:645-652. [PMID: 27187569 DOI: 10.1016/j.biortech.2016.04.132] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 04/26/2016] [Accepted: 04/28/2016] [Indexed: 06/05/2023]
Abstract
In this paper, we employ atomic force microscopy (AFM), fluorescence recovery after photobleaching (FRAP) technique, phospholipid fatty acids (PLFA) and MiSeq analysis to study the effects of traditional dissolved oxygen (DO) levels (0.71-1.32mg/L, 2.13-3.02mg/L and 4.31-5.16mg/L) on surface force, cell membrane properties and microbial community dynamics of activated sludge. Results showed that low DO level enhanced the surface force and roughness of activated sludge; the medium DO level decreased cell membrane fluidity by reducing the synthesis of branched fatty acids in the cell membrane; high DO level resulted in the highest protein content in the effluent by EEM scanning. Abundance of Micropruina, Zoogloea and Nakamurella increased and Paracoccus and Rudaea decreased with the increase of DO levels. RDA analysis suggested that saturated fatty acids (SFA), anteiso-fatty acids (AFA) and iso-fatty acids (IFA) were closely related to effluent quality as well as some genera.
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Affiliation(s)
- Si-Jia Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Li-Li Ding
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hui Huang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Jin-Ju Geng
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Ke Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Yan Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China
| | - Hong-Qiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.
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Pedrazzani R, Menoni L, Nembrini S, Manili L, Bertanza G. Suitability of Sludge Biotic Index (SBI), Sludge Index (SI) and filamentous bacteria analysis for assessing activated sludge process performance: the case of piggery slaughterhouse wastewater. ACTA ACUST UNITED AC 2016; 43:953-64. [DOI: 10.1007/s10295-016-1767-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Accepted: 03/26/2016] [Indexed: 10/22/2022]
Abstract
Abstract
Piggery slaughterhouse wastewater poses serious issues in terms of disposal feasibility and environmental impact, due to its huge organic load and variability. It is commonly treated by means of activated sludge processes, whose performance, in case of municipal wastewater, can be monitored by means of specific analyses, such as Sludge Biotic Index (SBI), Sludge Index (SI) and floc and filamentous bacteria observation. Therefore, this paper was aimed at assessing the applicability of these techniques to piggery slaughterhouse sewage. A plant located in Northern Italy was monitored for 1 year. Physical, chemical and operation parameters were measured; the activated sludge community (ciliates, flagellates, amoebae and small metazoa) was analysed for calculating SBI and SI. Floc and filamentous bacteria were examined and described accordingly with internationally adopted criteria. The results showed the full applicability of the studied techniques for optimizing the operation of a piggery slaughterhouse wastewater treatment plant.
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Affiliation(s)
- Roberta Pedrazzani
- grid.7637.5 0000000417571846 Department of Mechanical and Industrial Engineering (DIMI) Universita degli Studi di Brescia via Branze 38 25123 Brescia Italy
| | - Laura Menoni
- grid.7637.5 0000000417571846 Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM) Universita degli Studi di Brescia via Branze 43 25123 Brescia Italy
| | - Stefano Nembrini
- grid.7637.5 0000000417571846 Department of Economics and Management (DEM) Universita degli Studi di Brescia via S. Faustino 74/B 25122 Brescia Italy
| | - Livia Manili
- grid.7637.5 0000000417571846 Department of Mechanical and Industrial Engineering (DIMI) Universita degli Studi di Brescia via Branze 38 25123 Brescia Italy
| | - Giorgio Bertanza
- grid.7637.5 0000000417571846 Department of Civil, Environmental, Architectural Engineering and Mathematics (DICATAM) Universita degli Studi di Brescia via Branze 43 25123 Brescia Italy
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18
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Bafana A, Kumar G, Kashyap SM, Kanade GS, Shinde VM. Dynamics of effluent treatment plant during commissioning of activated sludge process unit. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:3538-3546. [PMID: 25249053 DOI: 10.1007/s11356-014-3597-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Accepted: 09/11/2014] [Indexed: 06/03/2023]
Abstract
Industrial effluent treatment plants (ETPs) are very important in protecting the environment and different life forms from harmful industrial waste. Hence, the efficiency of ETPs must be regularly monitored, particularly after major repair or replacement work. Present study evaluated the performance of an ETP over a period of 4 months, during which aeration tank (T1) of the activated sludge unit was replaced with a new one (T2). System had to be maintained operational during this transition, which warranted close monitoring of the system performance due to the daily load of hazardous industrial wastewater. Analysis showed that the raw wastewater was highly variable in composition and contained many hazardous organic and inorganic pollutants, such as heavy metals, bisphenol A and cyanoacetylurea. It showed significant toxicity against HepG2 cells in vitro. However, the ETP was found to successfully treat and detoxify the wastewater. Denaturing gradient gel electrophoresis (DGGE) analysis showed large temporal fluctuations in the ETP microbial community, which is consistent with the variable composition of wastewater. It indicated that functional stability of the ETP was not associated with stability of the microbial community, probably due to high microbial biodiversity and consequently high functional redundancy. In conclusion, the CETP showed consistent level of detoxification and microbial community dynamics after switching to T2, indicating successful development, acclimatization and commissioning of T2.
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Affiliation(s)
- Amit Bafana
- CSIR-NEERI (National Environmental Engineering Research Institute), Environmental Health Division, Nagpur, 440 020, India,
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19
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Tezcan Un U, Kandemir A, Erginel N, Ocal SE. Continuous electrocoagulation of cheese whey wastewater: an application of Response Surface Methodology. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2014; 146:245-250. [PMID: 25178530 DOI: 10.1016/j.jenvman.2014.08.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 08/07/2014] [Accepted: 08/11/2014] [Indexed: 05/24/2023]
Abstract
In this study, treatment of cheese whey wastewater was performed using a uniquely-designed continuous electrocoagulation reactor, not previously encountered in the literature. An iron horizontal rotating screw type anode was used in the continuous mode. An empirical model, in terms of effective operational factors, such as current density (40, 50, 60 mA/cm(2)), pH (3, 5, 7) and retention time (20, 40, 60 min), was developed through Response Surface Methodology. An optimal region characterized by low values of Chemical Oxygen Demand (COD) was determined. As a result of experiments, a linear effect in the removal efficiency of COD was obtained for current density and retention time, while the initial pH of the wastewater was found to have a quadratic effect in the removal efficiency of COD. The best fit nonlinear mathematical model, with a coefficient of determination value (R(2)) of 85%, was defined. An initial COD concentration of 15.500 mg/L was reduced to 2112 mg/L with a removal efficiency of 86.4%. In conclusion, it can be said that electrocoagulation was successfully applied for the treatment of cheese whey wastewater.
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Affiliation(s)
- Umran Tezcan Un
- Anadolu University, Department of Environmental Engineering, Eskisehir 26555, Turkey.
| | - Ayse Kandemir
- Anadolu University, Department of Environmental Engineering, Eskisehir 26555, Turkey
| | - Nihal Erginel
- Anadolu University, Department of Industrial Engineering, Eskisehir 26555, Turkey
| | - S Eren Ocal
- Anadolu University, Department of Chemical Engineering, Eskisehir 26555, Turkey
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20
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Saleem M, Moe LA. Multitrophic microbial interactions for eco- and agro-biotechnological processes: theory and practice. Trends Biotechnol 2014; 32:529-37. [PMID: 25192971 DOI: 10.1016/j.tibtech.2014.08.002] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 07/16/2014] [Accepted: 08/05/2014] [Indexed: 10/24/2022]
Abstract
Multitrophic level microbial loop interactions mediated by protist predators, bacteria, and viruses drive eco- and agro-biotechnological processes such as bioremediation, wastewater treatment, plant growth promotion, and ecosystem functioning. To what extent these microbial interactions are context-dependent in performing biotechnological and ecosystem processes remains largely unstudied. Theory-driven research may advance the understanding of eco-evolutionary processes underlying the patterns and functioning of microbial interactions for successful development of microbe-based biotechnologies for real world applications. This could also be a great avenue to test the validity or limitations of ecology theory for managing diverse microbial resources in an era of altering microbial niches, multitrophic interactions, and microbial diversity loss caused by climate and land use changes.
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Affiliation(s)
- Muhammad Saleem
- Department of Plant and Soil Sciences, 311 Plant Science Building, University of Kentucky, Lexington, KY 40546-0312, USA.
| | - Luke A Moe
- Department of Plant and Soil Sciences, 311 Plant Science Building, University of Kentucky, Lexington, KY 40546-0312, USA
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21
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Debowski M, Zieliński M, Krzemieniewski M, Rokicka M, Kupczyk K. Effectiveness of dairy wastewater treatment in a bioreactor based on the integrated technology of activated sludge and hydrophyte system. ENVIRONMENTAL TECHNOLOGY 2014; 35:1350-1357. [PMID: 24701933 DOI: 10.1080/09593330.2013.868528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim of this study was to determine the effectiveness of dairy wastewater treatment in the integrated technology based on the simultaneous use of the activated sludge method (AS) and a hydrophyte system (HS) (AS-HS), in this case, common reed (Phragmites australis) or common cattail (Typha latifolia). Experiments were conducted in an innovative reactor exploited in the fractional-technical scale at the loads of 0.05 mg BOD5/mg.d.m. d (biochemical oxygen demand) and 0.10 mg BOD5/mg.d.m d. The AS--HS enabled improving the removal effectiveness ofbiogenes characterized by concentrations of Ntot., N-NH4 and Ptot. In contrast, the integrated system had no significant reducing effect either on concentrations of organic compounds characterized by BOD5 and chemical oxygen demand parameters or on the structure of AS in the sequencing batch-type reactors.
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22
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Pesciaroli C, Rodelas B, Juarez-Jiménez B, Barghini P, Fenice M. Bacterial community structure of a coastal area in Kandalaksha Bay, White Sea, Russia: possible relation to tidal hydrodynamics. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0877-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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23
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Djelal H, Tahrani L, Fathallah S, Cabrol A, Mansour HB. Treatment process and toxicities assessment of wastewater issued from anaerobic digestion of household wastes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:2437-2447. [PMID: 24072641 DOI: 10.1007/s11356-013-2158-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 09/10/2013] [Indexed: 06/02/2023]
Abstract
Modern society grapples with large amounts of household waste. The anaerobic digestion of this waste offers a promising source for energy-rich biogas production but generates high toxic effluents that require treatment before reuse or disposal into the environment. This study aimed to investigate three techniques, namely coagulation/flocculation, electro-coagulation, and activated sludge, in terms of efficiency in the treatment of these effluents. It also aimed to assess their toxicity effects on the germination and growth of durum wheat Triticum aestivum L. seeds before and after 6 days of treatment. Activated sludge was most efficient in reducing chemical oxygen demand, turbidity, and conductivity (95.7 %, 15.8 %, and 37.5 %, respectively). The effluent treated with this technique induced a marked delay in germination (low mean time of germination) and a significant reduction in the percentages of seed germination and root and leaf growths. It was also noted to strongly induce lipid peroxidation in roots and leaves, which presumably explained the germination/growth inhibition of the wheat seeds. The effluent also induced marked lipid peroxidation effects and strongly inhibited the activities of butyrylcholinesterase in mice bone marrows. The effluent shows a high ability to inhibit the growth of three microalgae; these endpoints are useful tools to biomonitor the physico-chemical quality of this wastewater. Overall, while no significant alterations were observed in terms of animal and vegetable toxicities when the effluent was treated by coagulation/flocculation, activated sludge treatment proved efficient in reducing the toxicities induced by the untreated effluents. The results indicate that the application of this technique is promising with regards to attaining efficient, eco-friendly, and cost-effective strategies for the management and treatment of household waste.
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Affiliation(s)
- Hayet Djelal
- Ecole des Métiers de l'Environnement, Campus de Ker Lann, 35170, Bruz, France
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24
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Electrocoagulation of yogurt industry wastewater and the production of ceramic pigments from the sludge. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.09.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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25
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Calderón K, Reboleiro-Rivas P, Rodríguez FA, Poyatos JM, González-López J, Rodelas B. Comparative analysis of the enzyme activities and the bacterial community structure based on the aeration source supplied to an MBR to treat urban wastewater. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2013; 128:471-479. [PMID: 23810999 DOI: 10.1016/j.jenvman.2013.05.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/20/2013] [Accepted: 05/24/2013] [Indexed: 06/02/2023]
Abstract
A comparative analysis was performed in a pilot-scale membrane bioreactor (MBR) treating urban wastewater supplied with either pure oxygen (O2) or air, to assess the influence of each aeration source on the diversity and activity of the bacterial communities in the sludge. The MBR was operated in three experimental stages with different concentrations of volatile suspended solids (VSS) and temperature, and under both aeration conditions. α-Glucosidases, proteases, esterases and phosphatases were tested as markers of organic matter removal in the sludge, and the diversity of the bacterial community was analysed by fingerprinting (temperature-gradient gel electrophoresis of partially-amplified 16S-rRNA genes). Redundancy analysis (RDA) revealed that temperature and VSS concentration were the only factors that significantly influenced the levels of enzyme activities and the values of both the Shannon-Wiener diversity index (H') and the functional organisation index (Fo), while the bacterial community structure experienced significant changes depending on the aeration source supplied in each experimental stage.
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Affiliation(s)
- Kadiya Calderón
- Department of Microbiology, Institute of Water Research, Facultad de Farmacia, University of Granada, Campus de la Cartuja S/N, 18071 Granada, Spain.
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26
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Tocchi C, Federici E, Scargetta S, D’Annibale A, Petruccioli M. Dairy wastewater polluting load and treatment performances of an industrial three-cascade-reactor plant. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Microbial relevant fouling in membrane bioreactors: influencing factors, characterization, and fouling control. MEMBRANES 2012; 2:565-84. [PMID: 24958297 PMCID: PMC4021913 DOI: 10.3390/membranes2030565] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 07/20/2012] [Accepted: 08/09/2012] [Indexed: 11/17/2022]
Abstract
Microorganisms in membrane bioreactors (MBRs) play important roles on degradation of organic/inorganic substances in wastewaters, while microbial deposition/growth and microbial product accumulation on membranes potentially induce membrane fouling. Generally, there is a need to characterize membrane foulants and to determine their relations to the evolution of membrane fouling in order to identify a suitable fouling control approach in MBRs. This review summarized the factors in MBRs that influence microbial behaviors (community compositions, physical properties, and microbial products). The state-of-the-art techniques to characterize biofoulants in MBRs were reported. The strategies for controlling microbial relevant fouling were discussed and the future studies on membrane fouling mechanisms in MBRs were proposed.
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