微塑料累积对膜生物反应器运行特性的影响研究
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摘要
选取一种常见的微塑料-聚丙烯微球,在不排泥的情况下,研究聚丙烯微球累积对模拟长期运行的(3-5年)MBR系统运行情况的影响。结果表明,微塑料的累积导致了MBR系统出水水质变差、污泥浓度降低,且溶解性微生物产物及胞外聚合物含量增加,进而加快膜污染速率。但是MBR系统可以通过排泥作为收集微塑料的有效手段,为以后微塑料的回收再利用以及无害化处理提供方法。
Polypropylene microsphere, a common microplastic,was selected to study the impact of the accumulated polypropylene microspheres on the performance of MBR system in simulated long-term operation(3-5 years) without discharging sludge. The results showed that the accumulation of microplasticsin MBR system resulted in poor effluent quality, lower sludge concentration,and improved concentration of soluble microbial products and extracellular polymeric substances, which accelerated membrane fouling rate.The MBR system can be used as an effective means to collect microplastics through discharge of activated sludge, which provides a method for the recycling and harmless treatment of microplastics in the future.
Polypropylene microsphere, a common microplastic,was selected to study the impact of the accumulated polypropylene microspheres on the performance of MBR system in simulated long-term operation(3-5 years) without discharging sludge. The results showed that the accumulation of microplasticsin MBR system resulted in poor effluent quality, lower sludge concentration,and improved concentration of soluble microbial products and extracellular polymeric substances, which accelerated membrane fouling rate.The MBR system can be used as an effective means to collect microplastics through discharge of activated sludge, which provides a method for the recycling and harmless treatment of microplastics in the future.
引文
[1] Plastics-the Facts 2014/2015. An analysis of European plastics production, demand and waste data[J].PlasticsEurope,2015.
[2] DERRAIK J G B. The pollution of the marine environment by plastic debris:a review[J].Marine Pollution Bulletin,2002:842-852.
[3] THOMPSON K L L R C. Microplastics in the seas[J].Science,2014,345:144-145.
[4] ZHANG K, SU J, XIONG X, et al. Microplastic pollution of lakeshore sediments from remote lakes in Tibet plateau, China[J].Environ Pollut,2016,219:450-455.
[5] OBBARD R W, SADRI S, WONG Y Q, et al. Global warming releases microplastic legacy frozen in Arctic Sea ice[J].Earth's Future,2014,2(6):315-320.
[6] MCCORMICK A, HOELLEIN T J, MASON S A, et al.Microplastic is an abundant and distinct microbial habitat in an urban river[J].Environ Sci Technol,2014,48(20):11863-11871.
[7] ANDRADY A L. Microplastics in the marine environment[J].Mar Pollut Bull,2011,62(8):1596-1605.
[8] ZETTLER E R, MINCER T J, AMARAL-ZETTLER L A. Life in the"plastisphere":microbial communities on plastic marine debris[J].Environ Sci Technol,2013,47(13):7137-7146.
[9]国家环保局《水和废水监测分析方法》编委会.水和废水监测分析方法(第三版)[M].北京:中国环境科学出版社,1989.
[10] FR/OLUND B, GRIEBE T, NIELSEN P H. Enzymatic activity in the activated-sludge floc matrix[J].Applied Microbiology&Biotechnology,1995,43(4):755-761.
[11] LIU X M, SHENG G P, LUO H W, et al. Contribution of extracellular polymeric substances(EPS)to the sludge aggregation[J].Environmental Science&Technology,2010,44(11):4355-4360.
[12] SUN M, LI W W, YU H Q, et al. A novel integrated approach to quantitatively evaluate the efficiency of extracellular polymeric substances(EPS)extraction process[J].Applied Microbiology&Biotechnology,2012,96(6):1577-1585.
[13] ZHANG J, CHUA H C, ZHOU J, et al. Factors affecting the membrane performance in submerged membrane bioreactors[J].Journal of Membrane Science,2006,284(1-2):54-66.
[14] HAN X, WANG Z, CHEN M, et al. Acute responses of microorganisms from membrane bioreactors in the presence of Na OCl:Protective mechanisms of extracellular polymeric substances[J].Environ Sci Technol,2017,51(6):3233-3241.
[2] DERRAIK J G B. The pollution of the marine environment by plastic debris:a review[J].Marine Pollution Bulletin,2002:842-852.
[3] THOMPSON K L L R C. Microplastics in the seas[J].Science,2014,345:144-145.
[4] ZHANG K, SU J, XIONG X, et al. Microplastic pollution of lakeshore sediments from remote lakes in Tibet plateau, China[J].Environ Pollut,2016,219:450-455.
[5] OBBARD R W, SADRI S, WONG Y Q, et al. Global warming releases microplastic legacy frozen in Arctic Sea ice[J].Earth's Future,2014,2(6):315-320.
[6] MCCORMICK A, HOELLEIN T J, MASON S A, et al.Microplastic is an abundant and distinct microbial habitat in an urban river[J].Environ Sci Technol,2014,48(20):11863-11871.
[7] ANDRADY A L. Microplastics in the marine environment[J].Mar Pollut Bull,2011,62(8):1596-1605.
[8] ZETTLER E R, MINCER T J, AMARAL-ZETTLER L A. Life in the"plastisphere":microbial communities on plastic marine debris[J].Environ Sci Technol,2013,47(13):7137-7146.
[9]国家环保局《水和废水监测分析方法》编委会.水和废水监测分析方法(第三版)[M].北京:中国环境科学出版社,1989.
[10] FR/OLUND B, GRIEBE T, NIELSEN P H. Enzymatic activity in the activated-sludge floc matrix[J].Applied Microbiology&Biotechnology,1995,43(4):755-761.
[11] LIU X M, SHENG G P, LUO H W, et al. Contribution of extracellular polymeric substances(EPS)to the sludge aggregation[J].Environmental Science&Technology,2010,44(11):4355-4360.
[12] SUN M, LI W W, YU H Q, et al. A novel integrated approach to quantitatively evaluate the efficiency of extracellular polymeric substances(EPS)extraction process[J].Applied Microbiology&Biotechnology,2012,96(6):1577-1585.
[13] ZHANG J, CHUA H C, ZHOU J, et al. Factors affecting the membrane performance in submerged membrane bioreactors[J].Journal of Membrane Science,2006,284(1-2):54-66.
[14] HAN X, WANG Z, CHEN M, et al. Acute responses of microorganisms from membrane bioreactors in the presence of Na OCl:Protective mechanisms of extracellular polymeric substances[J].Environ Sci Technol,2017,51(6):3233-3241.