印染废水处理与回用工程实例
印染废水处理与回用工程实例
摘要：采用“混凝+ABR+活性污泥+机械过滤”处理某毛纺厂的印染废水，出水COD在50mg/L以下，色度低于10倍，优于《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准，同时出水回用于大中色降温及大色染色工段，回用率60%以上，与改造前比，运行费用降低一半。
关键词：印染废水 ；回用；一级A ；排河
Abstract: Treating the printing and dyeing wastewater of A woolen mill with the” coagulation +activated sludge +ABR+ mechanical filtration “, the effluent COD is under 50mg/L, the chromaticity is less than 10 times, it is better than the” urban sewage treatment plant pollutant discharge standard” ( GB18918-2002) the level of A standard, at the same time ,the cooling water back is used in major cooling and large color dyeing process, the back rate is more than 60%, and compared with the transformation before, the operating cost is reduced to half.
Key words: printing and dyeing wastewater; reuse; level A; Pai River
中图分类号：X505文献标识码：A 文章编号：2095-2104（2012）
Abstract：The combined process of coagulating sedimentation, ABR, activated sludge and mechanical filtration is used to treat Hebei a woolen mill wastewater to achieve that the COD is below 50mg/L and color degree is low 10 times, which are better than the Standard A of “Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant” (GB18918-2002). In addition, the output water is reused for water production plants, and the level of wastewater reuse is more than 90%, the operation cost has been reduced by half after the improvement.
Key words：woolen mill wastewater，reused，Standard A, discharge into River
前言
印染行业是高耗水行业，据不完全统计，截止2005年，国内印染行业每天排水量约450-500万吨，且因其处理难度。同时，印染废水经处理后回用率仅7%，是所有工业废水中最低的。随着水资源短缺及水质性缺水问题的日益突出，印染废水的处理和回用日益受到重视。
河北某毛纺厂生产高档防缩地毯纱，尾水达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级A标准后可排河。同时，该企业生产用水取自地下水，而该地区为地下水超采区，水资源极其紧张。因此对其污水站进行了改
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