树脂吸附法深度处理焦化废水生化尾水

Development and Application of Resin Adsorption Technology for Advanced Treatment of Bio-treated Coking Wastewater

以氨基化超高交联吸附树脂NDA-802吸附技术为核心,以焦化厂污水处理站的生化尾水为处理对象,开发了"混凝沉淀+砂滤+NDA-802树脂吸附"深度处理工艺,并实现了工程化应用。在控制树脂吸附流速为6 BV/h的条件下,以4%的HCl和6%的Na OH为脱附液,该工艺可将焦化废水生化尾水中的COD、SS、色度分别从120~150 mg/L、30~50 mg/L、100~150倍稳定降至80 mg/L、5 mg/L、20倍以下,达到了《炼焦化学工业污染物排放标准》(GB 16171—2012),并实现了部分处理出水的回用。

A combined process of ＂coagulation -sedimentation/sand fihratiorL/resin adsorption＂ was developed for advanced treatment of the bio-treated coking wastewater, and the optimized adsorption resin was aminated hyper-cross-linked polymeric adsorbent NDA-802. The resin adsorption was performed at a flow velocity of 6 bed volumes （BV） per hour, using 4% HC1 and 6% NaOH as the regeneration reagent. The combined process could effectively reduce COD, SS and chromaticity in the bio-treated sewage from 120 -150 mg/L, 30 -50 mg/L and 100 -150 degrees to less than 80 mg/L, 5 mg/L, and 20 degrees, respectively. The effluent not only met the Emission Standard of Pollutants for Coking Chemical Industry （GB 16171 -2012）. but also could be partially used as recycled water in production.