Since industrial wastewater has a large impact on the environment and is difficult to handle, some basic principles should be followed in the treatment of industrial and industrial wastewater in order to avoid its adverse effects on humans and the environment. Then, what are the principles to be followed in the industrial wastewater treatment process?
First of all, industrial waste water treatment should be preferred non-toxic production process to replace or reform the backward production process, as far as possible in the production process to eliminate or reduce toxic and hazardous wastewater. In the process of using toxic raw materials and producing toxic intermediates and products, strict operation and supervision shall be carried out to eliminate drip leakage, reduce loss, and adopt reasonable procedures and equipment.
Secondly, for those wastewaters containing highly toxic substances, such as containing some heavy metals, radioactive substances, high-concentration phenols, and cyanogens, they should be separated from other wastewaters in order to process and recover useful substances. Wastewater with large flow and light pollution should be recycled after proper treatment and should not be discharged into sewers so as not to increase urban sewer and urban sewage treatment load.
At the same time, organic wastewater similar to urban sewage, such as food processing wastewater, sugar wastewater, and paper-making wastewater, can be discharged into the urban sewage system for treatment; some toxic and toxic wastewater, such as phenol and cyanide wastewater, should be treated first. According to the allowable emission standards discharged into the city sewer, and further biochemical treatment.
In addition, there are some toxic waste waters that are difficult to biodegrade in the industrial wastewater treatment process. In this case, separate industrial waste water treatment should not be discharged into the urban sewers to avoid pollution of the entire urban sewer.
In short, the development trend of industrial wastewater treatment is to recycle waste water and pollutants as useful resources or to implement closed-circuit recycling, not only to reduce the discharge of wastewater and sewage, but also to make full use of resources as much as possible to reduce unnecessary waste.