The primary measures for preventing and controlling water pollution include the following three:

(1) Reduce and eliminate the amount of wastewater discharged from pollutants. Firstly, technological changes can be adopted to reduce or even eliminate wastewater discharge, or to reduce the toxicity of toxic wastewater. Secondly, reuse of wastewater. Try to use repeated and recycled water systems to reduce wastewater discharge or recycle production wastewater after appropriate treatment. For example, electroplating wastewater is circulated in a closed loop, while blast furnace gas washing wastewater is precipitated and cooled before being used for washing. 3、 Control the concentration of pollutants in wastewater and recover useful products. Try to separate the materials and products lost in the wastewater from the water as much as possible, and collect them on site. This can not only reduce production costs but also lower the concentration of wastewater. 4、 Handle urban garbage and industrial waste properly to avoid polluting water bodies due to the erosion and dissolution of precipitation or runoff.

(2) Overall planning, reasonable layout, and regional comprehensive management. When formulating regional planning, urban construction planning, and industrial zone planning, water pollution issues should be considered, and preventive measures should be taken for potential water pollution. Plan and comprehensively manage water pollution sources. The third method is to discharge industrial wastewater and urban sewage at will and establish standards. The fourth industry wastewater should be collected and treated to reduce the number of pollution sources and facilitate treatment. There is a plan to handle polluted water bodies.

(3) Strengthen monitoring and handling, formulate laws and control standards. Establish relevant environmental protection agencies, comply with relevant laws and control standards, coordinate and supervise various departments and factories to protect the environment and water sources. Publish relevant regulations, draft specific laws and regulations to protect water bodies, control and handle water pollution.

The article originates from: Natural Ecological Water Purification System http://www.scneng.com.hk