工业企业废水排放对城市污水厂进水浓度的影响

Influence of Industrial Enterprise Wastewater Discharge on Influent Concentration of Urban Sewage Plant

摘要: 工业企业用水量大，其废水排放对城市污水厂进水浓度有较大的影响。污水进水浓度低是目前国内城市污水厂运行的普遍问题，导致城市污水厂运行效率低下。目前尚缺乏工业废水排放对城市污水厂进水浓度的定量化研究。本文通过对某城市三个污水厂服务区域的工业企业的用水量、废水排放浓度、区域总用水量和污水厂进水流量和浓度的详细调查，分析工业废水排放对城镇污水厂进水浓度的影响。结果表明，除某个区域污水厂进水COD指标外，工业企业废水排水会对城市污水进行稀释，降低了污水厂进水指标污染物浓度10%~40%。

Abstract: Industrial enterprises consume a large amount of water, and their wastewater discharge has a greater impact on the change of the influent concentration of urban sewage plants. The low concentration of sewage influent is a common problem faced by the operation of domestic urban sewage plants at present, resulting in low operation efficiency of urban sewage plants. At present, there is still a lack of quantitative research on the concentration of industrial wastewater discharge on the influent concentration of urban sewage plants. This paper analyzes the influence of industrial wastewater discharge on the influent concentration of urban sewage plants through a detailed investigation of the water consumption, wastewater discharge concentration, regional total water consumption and sewage plant influent concentration of industrial enterprises in the service areas of three sewage plants in a city. The results show that, in addition to the COD index of the influent water of a certain regional sewage plant, the wastewater discharge of industrial enterprises will dilute the urban sewage, reducing the pollutant concentration of the influent index of the sewage plant by 10%~40%.