摘要
：目前对造纸废水的监测通常采取随机取样，很少考虑污染物在废水中的分布情况，所以取得的样品很难反映污染物的实际排放情况。为此，通过对某造纸厂排放废水中化学需氧量（ＣＯＤ） 分布规律及采样点位的优化研究，表明造纸废水中的ＣＯＤ 在距水表面１０ ｃｍ 处的浓度分布比较稳定，其横向和纵向ＣＯＤ 浓度值的平均相对误差分别为２８ ％ 和１１８ ％ ，因此选择距离水表面１０ ｃｍ 处作为最佳采样点位，取得的样品能较好反映ＣＯＤ 的实际排放情况。
The usual practice is random sampling for paper plant waste water, which reduces the representativity of samples while pollutants have distributing style. The research of distribution of COD of a paper plant’s waste water and optimization of sampling showed the concentration of COD was stable in 10 cm depth. The relative standard deviation of the vertical and the horizontal were 2 8% and 11 8% . So 10 cm in depth was a representative point of COD sampling.
出处
《环境监测管理与技术》
1999年第5期16-18,共3页
The Administration and Technique of Environmental Monitoring
基金
国家"九五"科技攻关课题子专题
关键词
化学需氧量
造纸
分布规律
废水监测
采样点位
COD
Waste water from paper plant
Distribution law
Sampling optimization
