Effect of methylisothiazolone on the bacterial growth, secretion and community structure in the effluent of MBR [甲基异噻唑琳酮对MBR出水微生物生长分泌特性及群落结构的影响] - 文章详情页

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摘要：

The　wastewater　reclamation　reverse　osmosis　(RO)　system　has　been　widely　used,　but　hindered　by　the　fouling　of　RO　membrane.　Adding　non-oxidizing　biocides　is　a　common　method　to　control　biological　fouling　of　RO　membranes.　Although　biocides　can　inhibit　bacterial　growth,　it＇s　not　clear　how　non-oxidizing　biocides　take　effect　on　the　secretion　of　microorganism.　Our　previous　study　has　found　that　the　extracellular　polymeric　substance　(EPS)　of　bacteria　is　an　important　factor　in　the　biofouling　of　RO　membranes,　rather　than　the　bacteria.　Therefore,　in　this　study　we　analyzed　the　effect　of　methylisothiazolone　(MIT,　a　kind　of　typical　non-oxidizing　biocide)　on　the　growth,　community　structure　and　secretion　characteristics　of　microorganism　in　the　effluent　of　MBR,　which　was　used　for　wastewater　reclamation　with　RO.　Results　show　that　with　the　increase　of　MIT　concentration,　the　lag　phase　in　microbial　growth　prolonged　significantly,　but　the　biomass　concentration　in　the　stable　phase　increased,　which　means　MIT　could　not　effectively　control　the　long　term　growth　of　microorganisms.　With　the　increase　of　MIT　concentration,　the　relative　abundance　of　Paenarthrobacter　increased　significantly,　and　the　EPS　concentration　also　increased,　which　may　aggravate　the　fouling　of　RO　membrane.　Therefore,　the　addition　of　MIT　is　detrimental　to　the　control　of　RO　fouling.　©　2019,　Science　Press.　All　right　reserved.

关键词：

Microbial community structure; Reclaimed water; Reverse osmosis; Secretory characteristics

作者机构：

[ 1 ] [Luo, L.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China
[ 2 ] [Luo, H.]Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Luo, H.]Beijing Yizhuang Water Co., Ltd, Beijing, 100176, China
[ 4 ] [Cui, Y.]Beijing Yizhuang Water Co., Ltd, Beijing, 100176, China
[ 5 ] [Wang, Y.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China
[ 6 ] [Tong, X.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China
[ 7 ] [Wu, Y.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China
[ 8 ] [Hu, H.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing, 100084, China
[ 9 ] [Hu, H.]Shenzhen Environmental Science and New Energy Technology Engineering Laboratory, Tsinghua-Berkeley Shenzhen Institute, Shenzhen, 518055, China

通讯作者信息：

[Hu, H.]Environmental Simulation and Pollution Control State Key Joint Laboratory,State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua UniversityChina

电子邮件地址：

hyhu@tsinghua.edu.cn

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