净水技术2025，Vol.44Issue(1)：185-191,202,8.DOI:10.15890/j.cnki.jsjs.2025.01.023
城镇污水处理厂生物反应池硝氮和氨氮在线仪表维护探索
Exploration of Online Analyzers Maintenance for Nitrate and Ammonia Nitrogen in Biological Reaction Tank of Urban WWTP
张辉 1张海龙 2王佳伟 1文鹏丽 2袁星 1屈格非1
作者信息
- 1. 北京城市排水集团有限责任公司,北京 100124||北京市污水资源化工程技术研究中心,北京 100124
- 2. 北京北排科技有限公司,北京 100124
- 折叠
摘要
Abstract
[Objective]The biological reaction tank is the key treatment unit of the WWTP.The dynamic monitoring of the water quality can not only assist the operators to make timely process adjustments,but also is a key link in the realization of a smart WWTP.At present,online water quality analyzers were mainly used in the influent and effluent sections,and were rarely used in biological reaction tank.Based on the actual cases,this paper explored from the perspective of maintenance of online water quality analyzers,and provided support for the advancement of smart WWTP.[Methods]The paper discovered the problems through the analysis of the abnormal measurement data.And through the comparative analysis of the data before and after the problem-solving,the possible factors affecting the accuracy of the online water quality analyzers and the solutions were determined.[Results]It was found that in the process of analyzers maintenance and calibration,the quality of electrode,the installation location and the temperature were the aspects that need to be paid attention.The nitrate nitrogen on-line data trends of the middle section of the third corridor of aerobic tank were consistent,but obviously different from the laboratory data.After electrode replacement,the data returned to normal.The nitrogen online analyzers of the end of anoxic tank was in a position with a small flow rate,and the data had been below 1 mg/L for a long time,which was obviously different from the laboratory data of 4～5 mg/L.After position changed with a large flow rate,the data returned to normal.For nitrate nitrogen on-line data of the end of anoxic tank,there was an unstable coincidence of the data of the two analyzers in winter.When the temperature was considered in the maintenance method,the data coincidence was significantly improved.[Conclusion]To sum up,in order to ensure the stability and accuracy of the online analyzers,it is necessary to improve the management of the electrode quality.The installation position should be selected in a uniformly mixed position.During the calibration process,the voltage record should be carried out after the temperature is stable.If the maintenance is good and the actual mass concentration is above 5 mg/L,the relative error of the ion-selective electrode online analyzer's measurement data can be controlled within 15％.关键词
生物反应池/水质在线仪表/维护/电极质量/安装位置/温度Key words
biological reaction tank/water quality online analyzer/maintenance/quality of electrodethe/installation location/temperature分类
建筑与水利引用本文复制引用
张辉,张海龙,王佳伟,文鹏丽,袁星,屈格非..城镇污水处理厂生物反应池硝氮和氨氮在线仪表维护探索[J].净水技术,2025,44(1):185-191,202,8.
