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论文类型： 期刊论文

发表时间： 2009-04-01

发表刊物： ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY

收录刊物： SCIE、EI、Scopus

卷号： 28

期号： 1

页面范围： 155-161

ISSN号： 1944-7442

关键字： simultaneous nitrification and denitrification; biological assimilation; membrane biorector; wastewater treatment

摘要： The performance of an anoxic/oxic membrane bioreactor system for the simultaneous removal of nitrogen and chemical oxygen demand (COD) was investigated. This process removed up to 87% of total nitrogen (TN) and 94% of COD, with the influent concentrations of 200 mg NH(4)(+)-N/L and 4000 mg COD/L and a recycle ratio (R) of 200%. Biological assimilation and simultaneous nitrification and denitrification (SND) were considered on nitrogen removal process. The TN removal efficiency was above 87.5%, while the nitrogen being removed through SND was above 75.5% and nitrogen assimilated into the biomass was below 24.5%, with influent concentration below 200 mg NH(4)(+)-N/L, TN removal efficiency decreased significantly to 37.5%, of which 49.5% was provided by microorganism growth. Batch experiments provided evidence for the phenomena of SND. Furthermore, the SND removal efficneicy increased gradually from 26.8 to 90.0%. (C) 2008 American Institute of Chemical Engineers Environ Prog, 28: 155-161, 2009