Affiliations: School of Environmental Science and Engineering,
Shanghai Jiaotong University, Shanghai 200240, China | School of Environmental Science and Engineering,
Donghua University, Shanghai 200051, China
Abstract: In this study, the effect of zeolite powder addition on submerged
membrane bioreactor (SMBR) on membrane permeability, and the removals for COD,
NH_3-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
NH_3-N in test system was obtained regardless of influent
NH_3-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
zeolite powder added sludge and control activated studge were measured to be
75mgO_2/(gML VSS·h) and 24
mgO_2/(gML VSS·h) respectively, it meant that the
zeolite powder addition could enhance the microorganism activity
significantly.
