ZHAOAn-yu.Countermeasures and Control Measures for the Sudden Decrease of Effluent Residual Chlorine in Waterworks[J].China Water & Wastewater,2022,38(18):83-86.
水厂出水余氯突然大幅降低的应对和管控措施
- Title:
- Countermeasures and Control Measures for the Sudden Decrease of Effluent Residual Chlorine in Waterworks
- 摘要:
- 目前，越来越多的水厂从常规工艺转变为深度处理工艺，取消前加氯，通过后加氯和补加氯保持出水余氯浓度。杭州祥符水厂深度处理改造后运行一年多，发现出水余氯值突然大幅降低，从而引起炭滤池会根据来水的水质情况形成相对稳定的生物膜，而炭滤池在原水氨氮长期偏低的情况下运行所形成的生物膜不足以应对原水氨氮突然短时升高的现象，此时的氨氮去除效果就会不理想。针对这种情况，提出了相应的解决措施和管控途径，以保障出水余氯的稳定。
- Abstract:
- At present, more and more waterworks have changed from conventional process to advanced treatment process, which eliminates pre-chlorination, and maintains the residual chlorine concentration by post-chlorination and supplementary chlorination. After operating over a year of advanced treatment process in Hangzhou Xiangfu waterworks, the effluent residual chlorine value suddenly decreased greatly. Since the carbon filter forms a relatively stable biofilm according to the influent quality, the common biofilm formed in long?term low influent ammonia nitrogen is not sufficient to deal with the suddenly increased influent ammonia nitrogen, which causes the unsatisfactory ammonia nitrogen removal rate. In view of this situation, corresponding solutions and control approaches are proposed to ensure the stability of residual chlorine.
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