Chemical wastewater treatment
There are many types of chemical wastewater, taking dye wastewater as an example.
Dye wastewater contains a variety of harmful and toxic substances, and its chroma is heavier. Therefore, a single traditional process cannot be used in the treatment. New technologies and new processes should be used in a targeted manner to effectively treat the wastewater one by one to achieve standard discharge. Recycling the recycled water after wastewater treatment has not only environmental and social benefits, but also greater economic benefits.
With regard to the dye wastewater provided, after repeated tests and demonstrations, our company plans to adopt a variety of comprehensive treatment technologies to ensure compliance with standards.
Specifically, the electrolytic method is described below.
Electrolysis method: It is a new technology developed by our company and has obtained national patents. This technology is a pulsed electrochemical reaction under the action of a direct-current electric field. It is not restricted by any conditions and is adapted to the treatment of multiple harmful components coexisting. The electrolytic method has four functions: redox-decolorization and deodorization-air flotation-flocculation. It not only has a good degradation effect on heavy metal ions, but also various organic and inorganic substances. Although it has little effect on non-oxidizing substances, it can increase the activity of wastewater. The test shows that the dye wastewater is directly treated by the adsorption method, and the COD degradation is only 10%, and the chroma is reduced by 30%. If the dye wastewater is chemically treated, it is firstly electrolyzed and then enters the adsorption method. COD can be degraded by more than 90%, and the total chroma can be reduced by 70%. Therefore, the electrolytic treatment process has laid the foundation for the later process treatment. The handling cost is 0.3 yuan / ton of water.
Figure 1 Dye wastewater treatment processThe processing results are: COD <50mg / L, chromaticity is zero, and PH 6-9, which is far lower than national emission standards.