浊度补偿紫外光谱法测定市政污水厂进水COD  

Determination of inlet COD in Municipal Sewage by Ultraviolet Spectrometry after Turbidity Compensation

作　　者：王磊 朱峰 WANG Lei;ZHU Feng(Kunshan Construction Engineering Environment Investment Co.,Ltd.,Jiangsu Kunshan 215300,China)

机构地区：[1]昆山建工环境投资有限公司,江苏昆山215300

出　　处：《广州化工》2024年第8期142-145,178,共5页GuangZhou Chemical Industry

摘　　要：为解决市政污水厂进水预警问题,采用紫外光谱法对某市政污水厂进水样本进行了跟踪测定,拟合出COD-A模型以及浊度-A模型。实验排除了共价化合物、其他紫外区弱吸收的化合物以及浊度对检测结果的影响。实验结果表明,在波长254 nm处,具有稳定组成的样品其COD和吸光度A存在良好线性关系,皮尔逊相关系数r=0.941 475;利用SOLVER拟合出模型最小期望值∑θ^(2)=0.011 679,只要将254 nm及546 nm处的吸光度值带入浊度补偿模型就可以快速计算出COD值。In order to solve the problem of water inlet warning of municipal sewage plant,ultraviolet spectrum method was adopted to track and measured the water inlet COD samples from a municipal sewage plant.The COD-A model and Turbidity-A model were fitted.The influence of covalent compounds,other weakly US-absorbed compounds and turbidity were excluded later.The experimental results showed that there was a good linear relationship between COD and absorbance of samples with stable composition at wavelength 254 nm,and the Pearson correlation coefficient r=0.941475 was calculated.The minimum expected valueΣθ^(2)=0.011679 was fitted by SOLVER.As long as the absorbance values at 254 nm and 546 nm are measured,the COD value can be quickly calculated by the turbidity compensation model.

关 键 词：市政污水 紫外光谱法 浊度补偿 皮尔逊 SOLVER 

分 类 号：X703[环境科学与工程—环境工程]