1. It is preferred to use non-toxic production processes instead of or to reform backward production processes, and to eliminate or reduce the generation of toxic and harmful wastewater in the production process.
2. In the process of using toxic raw materials and producing toxic intermediates and products, strict operation and supervision should be carried out to eliminate dripping, reduce loss, and adopt reasonable processes and equipment.
3. Waste water containing highly toxic substances, such as heavy metals, radioactive materials, high concentration phenol, cyanide wastewater should be separated from other wastewater to treat and recover useful materials.
4. Waste water with large flow and light pollution should be recycled after proper treatment and should not be discharged into sewers to avoid increasing urban sewer and urban sewage treatment load.
5. Organic wastewater similar to urban sewage, such as food processing wastewater, sugar wastewater, and papermaking wastewater, can be discharged into urban sewage systems for treatment.
6. Some toxic waste waters that can be biodegraded, such as phenol and cyanide wastewater, should be treated first, discharged into urban sewers according to the allowable discharge standards, and then further biochemical treatment.
7. Containing toxic waste water that is difficult to biodegrade, it should be treated separately and should not be discharged into urban sewers. The development trend of industrial wastewater treatment is to recycle wastewater and pollutants as useful resources or to implement closed loops.
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