Organics Fate in a MBR-NF System Treating Antibiotic Wastewater
A double membrane system combining membrane bioreactor (MBR) with nanofiltration membrane (NF) at pilot scale was installed and operated to treat real antibiotic wastewater for over three months at a pharmaceutical company in Wuxi (China).In the 1st stage,the hydraulic retention time (HRT) of MBR was optimized to 30-36 h with better water quality comparing the local oxidation ditch plant (72h).In the 2nd stage,the NF was equipped following the MBR,and the water yield of NF reached over 925.6% through recycling the NF concentrate to the MBR tank.The pilot scale system operation in good conditions and obtained excellent water quality,which the concentration of TOC was stable at 5.52 mg/L.The MBR unit in MBR-NF system could match the level of conventional biological plants whereas the water yield was much higher.Organics analysis results showed that the main organics in biological effluent were proteins,fulvic acid-like and humic-like substances.These organics could be perfectly rejected by NF membrane but be accumulated in MBR unit due to recycling NF concentrate.
antibiotic wastewater MBR-NF water yield organics fate
J.X. Wang Y.S. Wei K. Li Y.T. Cheng
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
10-12
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）