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.
Countermeasures and Control Measures for the Sudden Decrease of Effluent Residual Chlorine in Waterworks
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第18期
Page:
83-86
Column:
Date of publication:
2022-09-17
- 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.
Last Update:
2022-09-17