Diatomite Precoated Nonwoven Membrane Bioreactor for Domestic Wastewater Reclamation  

作　　者：何月玲 饶品华 张文启 金鹏 

机构地区：[1]College of Chemistry and Chemical Engineering,Shanghai University of Engineering Science [2]China Northeast Architectural Design and Research Institute Co.,Ltd.

出　　处：《Journal of Donghua University(English Edition)》2015年第1期109-112,共4页东华大学学报（英文版）

基　　金：China State Construction Innovation Project(No.CSCEC-2012-Z-14);Shanghai Education Research and Innovation Project,China(Nos.11ZZ176,12YZ153,and ZZGJD12052)

摘　　要：Nonwoven was selected as filtration materials in submerged membrane bioreactor( MBR) for domestic wastewater reclamation. For its hydrophobic membrane surface,diatomite was precoated on nonwoven to improve membrane hydrophilicity. In the precoating stage,diatomite dynamic membrane could be formed on10 μm polyethylene nonwoven surface efficiently and effluent turbidity could be below 5 nephelometric turbidity units( NTU).The MBR system was operated steadily under gravity flow and scanning electron microscope( SEM) analysis showed that nonwoven membrane was only partially fouled at the membrane flux of 5 L/( m2·h). Average removal efficiencies of chemical oxygen demand( COD) and NH +4-N were above 86 % and 50 %,respectively. The effluent turbidity and chromaticity were below 5 NTU and 25°,respectively. Those results could meet the requirements for wastewater reuse.Nonwoven was selected as filtration materials in submerged membrane bioreactor（ MBR） for domestic wastewater reclamation. For its hydrophobic membrane surface,diatomite was precoated on nonwoven to improve membrane hydrophilicity. In the precoating stage,diatomite dynamic membrane could be formed on10 μm polyethylene nonwoven surface efficiently and effluent turbidity could be below 5 nephelometric turbidity units（ NTU）.The MBR system was operated steadily under gravity flow and scanning electron microscope（ SEM） analysis showed that nonwoven membrane was only partially fouled at the membrane flux of 5 L/（ m^2·h）. Average removal efficiencies of chemical oxygen demand（ COD） and NH ＋4-N were above 86 % and 50 %,respectively. The effluent turbidity and chromaticity were below 5 NTU and 25°,respectively. Those results could meet the requirements for wastewater reuse.

关 键 词：DIATOMITE NONWOVEN membrane bioreactor(MBR) wastewater reclamation 

分 类 号：X703[环境科学与工程—环境工程]