点击次数：

发布时间：2019-03-10

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：PubMed、SCIE

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.