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Membrane in Active Sludge Terminal Filter Pollution Behavioral Research

Author: ChenLu
Tutor: LiZuoHua；WangYong
School: Nanjing University
Course: Environmental Engineering
Keywords: Membrane bioreactor Membrane fouling Film evaluation
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 28
Quote: 0
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Abstract


The membrane bioreactor (Membrane Bioreactor, MBR) is an emerging technology to membrane technology used in sewage treatment . The design of this project a terminal filter membrane bioreactor experimental device to study the behavior of membrane fouling test film with the flux of the modified membrane , to look for the evaluation of membrane fouling , so that you can find out the film modified method to extend membrane life and reduce the cost of sewage treatment . Terminal of commodities film filter Experimental Research , found that the greater the membrane pore size , pore plugging resistance accounted for a greater proportion ; membrane pore size is smaller , the film is more easily contaminated ; membranes with different pore sizes by pollution from leading role : the macroporous membrane by blockage of membrane pores play a leading role , the small pore size membrane is to play a leading role in the film formed on the surface of the cake layer . The the commodity film anti-pollution performance of the merits of the order to : 0.1 μm membrane fouling best performance , 0.8 μm membrane worst pollution performance 0.22μm membrane and of 0.45μm membrane effect between the two . For the plasma membrane graft reaction modification results : this modified method for 0.1μm membrane , 0.22μm film and 0.8μm film successful . Membrane MWCO 300,000 , as well as laboratory -made film no obvious effect . According to the initial guess , which is due to the two film itself has a better anti-pollution properties , antifouling properties after modification is simply not evident before the modification , but for specific reasons , but also to further study . Finally, experimental summed up the film there are three kinds of evaluation methods , namely: 15 cycles ( calculated flux and Rp values ??) ; 150min sludge model ( experiment concluded that : In the process of membrane fouling membrane pore clogging or cake layer blocking dominant ) ; proportion of the Kp calculation ( membrane clogging resistance )

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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