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Date of Publication:2007-01-01

Journal:大连理工大学学报

Affiliation of Author(s):环境学院

Issue:5

Page Number:647-651

ISSN No.:1000-8608

Abstract:Sphingomonas xenophaga QYY was used to enhance the ability of membrane bioreactor (MBR) treating simulated bromamine acid wastewater. The degradability and characteristics of activated sludge and the physiological state of microbial community were studied. A DNA fingerprint technique-ribosomal intergenic sequence analysis (RISA) was applied to investigate the changes of microbial community during the startup phase. The results show that bioaugmentation can accelerate the startup of the MBR and relatively maintain stable operation. During the startup phase, the concentration of activated sludge decreased, the settle and flocculation ability was becoming better, the TTC-dehydrogenase activity declined and was kept at a low level, and the concentration of protein and carbohydrate in the extracellular polymeric substances (EPS) was increased. At the end of the startup phase, the decolorization rate of bromamine acid was over 90%, and the removal of COD was over 50%. RISA fingerprint shows that the genetic diversity of the activated sludge communities is decreased. The functional community with the ability of degrading bromamine acid is developed.

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