The domestic sewage discharge is the important source of non-point pollution in rural area.

农村生活污水是农村面源污染的重要来源。

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The water pollution can be divided into two major categories of point source and area-source pollution according to the different way of discharge.

根据排放方式的不同，水体污染可以分为点源污染和非点源污染两大类。

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This paper introduces how Jihua Synthetic Resin Factory gets the wastewater in ABS unit to reach the COD discharge standard by the method of point source treating and process optimizing.

对吉林石化公司合成树脂厂废水处理系统存在问题进行了分析，通过点源治理、艺调优等方法使废水COD达标。

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