MBR—NF处理印染废水

Treatment of Printing and Dyeing Wastewater by MBR-NF Process

采用MBR—纳滤(MBR—NF)组合工艺处理印染废水。运行结果表明:MBR出水的COD、ρ(NH3-N)和TN分别为94,0.93,8.88mg/L,COD、NH3-N和TN的平均去除率分别为87%、95.8%和70.2%,出水水质满足GB4287—92《纺织染整工业水污染物排放标准》中的一级标准;再经NF处理后出水COD、色度、ρ(总Fe)、ρ(总Mn)和pH分别为11～30mg/L、2.3～7.4倍、0.065～0.095mg/L、0mg/L和8.06～8.21,水质可满足印染工艺回用要求。

Printing and dyeing wastewater was treated by membrane bioreactor (MBR)-nanofiltration (NF) process. The running results show that:The COD,ρ(NH3-N),TN of the MBR effluent are 94,0.93,8.88 mg/L,and the average removal rats of them are 87%,95.8% and 70.2% respectively,which can meet the first grade standards of GB4287-92; The COD,chroma,ρ(total Fe),ρ(total Mn) and pH of the NF effluent are 11-30 mg/L,2.3-7.4 folds,0.065-0.095 mg/L,0 mg/L and 8.06-8.21 respectively,and the effluent quality can meet the requirements for reuse in printing and dyeing process.