【摘 要】
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In this study, the effect of zeolite powder addition on submerged membrane bioreactor (SMBR) on membrane permeability,and the removals for COD, NH3-N, TN were i
【机 构】
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School of Environmental Science and Engineering
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In this study, the effect of zeolite powder addition on submerged membrane bioreactor (SMBR) on membrane permeability,and the removals for COD, NH3-N, TN were investigated. Through the parallel operation of control and test systems, it was found that the zeolite powder addition could alleviate the ultra-filtration membrane fouling and enhance the membrane permeability. On the basis of experimental investigations, a concept of "protection coating layer" was proposed to illustrate the phenomenon of UF membrane fouling. In addition, the removal for COD in test system was more stable, a little higher compared to the control system. Due to the combination of nitrification and ion exchange, a more excellent removal for NH3-N in test system was obtained regardless of influent NH3-N loading rate. It was also found that a mean 25% higher TN removal took place in the test system, and ion exchange and simultaneous nitrification and de-nitrification were analyzed to be main factors. During the stable operation period, the SOURs of test pectively, it meant that the zeolite powder addition could enhance the microorganism activity significantly.
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