摘要
针对目前我国污染源监控数据缺乏深层次利用,监测数据对污染源不能有效预警的状况,以S市某污水处理厂为例,在全面分析2010年出水COD在线监测数据的变化规律的基础上,建立基于频次分析法的预警阈值确定方法,确定了污水处理厂排放不同警情的阈值范围.结果显示,污水处理厂全年出水浓度集中在40~60mg/L,16：00,20：00以及22：00排水COD较高,超标率大,应加强监控.污水厂正常、一般、不正常以及极不正常状态阈值范围分别可设为小于30%频次、20%频次、10%频次以及超过10%频次对应的浓度范围.对污水厂全年监测数据进行警情状态验证,结果显示全年正常、一般、不正常以及极不正常状态出现的比例分别为70.4%、9.9%、9.8%以及9.9%.
In view of the inadequate data use of monitored pollution sources and the failure to early alarm pollution accidents in China, this study used frequency analysis equation to calculate the concentration of different occurrence rates and developed an emergency plan based on thorough analysis of the monitored COD data from a sewage treatment plant in the S city. Effluent concentration from the treatment plant ranged from 40-60mg/L, and the COD concentration was higher at 16：00, 20：00, and 22：00, at which hours the exceedance rate was high and monitoring and control should be strengthened at these times. The threshold frequency of exceedance can be set as 30%, 20%, 10% and below 10% for the normal, regular, abnormal and extremely abnormal status of the treatment plant, respectively. The emergency status was examined using monitored data of the year in terms of the threshold concentration at the different hours, and the result indicated that the emergency rate of the normal, regular, abnormal and extremely abnormal status in the year was 70.4%, 9.9%, 9.8% and 9.9%.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2012年第10期1792-1798,共7页
China Environmental Science
基金
水体污染控制与治理科技重大专项资助(2009ZX07528-006-02
2009ZX07528-002)
关键词
污水处理厂
在线监测预警
阈值
频次法
sewage treatment plant
on-line monitoring early waming, threshold range
frequency analysis
