Biodegradation of two model estrogenic compounds in a preanoxic/anaerobic nutrient removing membrane bioreactor.
Biodegradation of two model estrogenic compounds in a preanoxic/anaerobic nutrient removing membrane bioreactor.
复制标题
DOI：
10.1016/j.desal.2007.12.057
复制
发表时间：
2009-07
期刊：
影响因子：
9.9
通讯作者：
Ki Pal Kim;Zubair Ahmed;K. Ahn;K. Paeng
中科院分区：
文献类型：
--
作者：
Ki Pal Kim;Zubair Ahmed;K. Ahn;K. Paeng
采用序批式缺氧/厌氧-好氧膜生物反应器（SAM），以人工合成水为进水，在SRT为60 d的条件下，研究了生物脱氮除磷及双酚A（BPA）和2，4-二氯苯酚（2，4-DCP）的降解规律。考察了系统对总氮、总磷、COD、BPA和2，4-DCP的去除效果。SAM在整个运行期间显示出有效的COD去除率（>99%）。TN和TP的去除率分别为74.3±4.7%和79.1± 7.2%。BPA和2，4-DCP的平均去除率分别为74.3%和78%。考虑到系统的水力特性，由于空气吹脱和吸附的化合物与每日剩余污泥浪费量排出的量的质量通量，这两种化合物的质量平衡。结果表明，生物降解是该系统去除有机污染物的主要途径，其去除量占系统总去除量的80%以上。
Biological nutrient removal and the fate of two estrogenic compounds, bisphenol A (BPA) and 2,4-dicholorophenol (2,4-DCP) were studied using a sequencing anoxic/anaerobic-aerobic membrane bioreactor (SAM) which was fed with synthetic water and operated at SRT of 60 days. Total nitrogen (TN), total phosphorus (TP), COD, BPA and 2,4-DCP removal performances were evaluated. The SAM showed efficient COD removal (>99%) throughout the period of operation. The TN and TP removal efficiencies were 74.3±4.7% and 79.1±7.2%, respectively. The removal efficiency of BPA and 2,4-DCP was 74.3% and 78% on average basis respectively. A mass balance of both compounds was derived considering the hydraulic characteristics of the system, mass flux due to air stripping and quantity of adsorbed compound discharged with daily excess sludge wastage. The results indicated that biodegradation was the major removal path way from the system contributing above 80% of removal.