文献类型：期刊文献

英文题名：Coking wastewater treatment for industrial reuse purpose: Combining biological processes with ultrafiltration, nanofiltration and reverse osmosis

作者：Jin, Xuewen[1,2];Li, Enchao[1,2];Lu, Shuguang[1];Qiu, Zhaofu[1];Sui, Qian[1]

机构：[1]E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]Shanghai Baosteel Chem Co Ltd, Shanghai 201901, Peoples R China

年份：2013

卷号：25

期号：8

起止页码：1565

外文期刊名：JOURNAL OF ENVIRONMENTAL SCIENCES

收录：;EI(收录号：20133416647415);WOS:【SCI-EXPANDED(收录号:WOS:000323356700008)】；

语种：英文

外文关键词：coking wastewater; industrial water reuse; biological treatment; MBR; NF-RO

摘要：A full-scale plant using anaerobic, anoxic and oxic processes (A(1)/A(2)/O), along with a pilot-scale membrane bioreactor (MBR), nanofiltration (NF) and reverse osmosis (RO) integrated system developed by Shanghai Baosteel Chemical Co. Ltd., was investigated to treat coking wastewater for industrial reuse over a period of one year. The removals reached 82.5% (COD), 89.6% (BOD), 99.8% (ammonium nitrogen), 99.9% (phenol), 44.6% (total cyanide (T-CN)), 99.7% (thiocyanide (SCN-)) and 8.9% (fluoride), during the A(1)/A(2)/O biological treatment stage, and all parameters were further reduced by over 96.0%, except for fluoride (86.4%), in the final discharge effluent from the currently operating plant. The pilot-scale MBR process reduced the turbidity to less than 0.65 NTU, and most of the toxic organic compounds were degraded or intercepted by the A(1)/A(2)/O followed MBR processes. In addition, parameters including COD, T-CN, total nitrogen, fluoride, chloride ion, hardness and conductivity were significantly reduced by the NF-RO system to a level suitable for industrial reuse, with a total water production ratio of 70.7%. However, the concentrates from the NF and RO units were highly polluted and should be disposed of properly or further treated before being discharged.