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论文类型： 期刊论文

发表时间： 2009-01-01

发表刊物： BIORESOURCE TECHNOLOGY

收录刊物： SCIE、PubMed

卷号： 100

期号： 1

页面范围： 136-141

ISSN号： 0960-8524

关键字： COD/N ratio; Nutrient removal; Membrane bioreactor; Simultaneous nitrification and denitrification; Wastewater treatment

摘要： A modified membrane bioreactor (MBR) system has been developed to evaluate the efficiency of nutrient removal in treating synthetic high strength water. This study examined the effect of influent COD/N ratio on this system. Results showed that above 95.0% removal efficiencies of organic matter were achieved; indicating COD removal was irrespective of COD/N ratio. The average removal efficiencies of total nitrogen (TN) and phosphate (PO43--P) with a COD/N ratio of 9.3 were the highest at 90.6% and 90.5%, respectively. Furthermore, TN removal was primarily based on simultaneous nitrification and clenitrification (SND) process occurred in the aerobic zone. Decreased COD/N ratios to 7.0 and 5.3, TN removal efficiencies in steady-states were 69.3% and 71.2%, respectively. Both aerobic SND and conventional biological nitrification/denitrification contributed to nitrogen removal and the latter played dominant effect. PO43--P-release and uptake process ceased in steady-states of COD/N 7.0 and 5.3, which decreased its removal efficiency significantly. (c) 2008 Elsevier Ltd. All rights reserved.