Primary decolorizer for treating high-chromaticity chemical industry wastewater

Abstract

The invention discloses a primary decolorizer for treating high-chromaticity chemical industry wastewater and relates to the technical field of treatment of pesticide wastewater. The primary decolorizer is prepared from the following raw materials in parts by weight: 10-15 parts of volcanic ash, 10-15 parts of rock flour, 5-10 parts of dry wheat straw powder, 3-5 parts of sodium carboxymethyl cellulose, 2-4 parts of column chromatography silica gel, 1-2 parts of raw molecular sieve powder, 1-2 parts of pregelatinized starch, 0.5-1 part of carrageenan, 0.5-1 part of sodium gluconate, 0.5-1 part of aluminum magnesium silicate, 0.3-0.5 part of calcium propionate, 0.3-0.5 part of hydrogenated palm oil and 0.1-0.2 part of nano zinc oxide. According to the decolorizer disclosed by the invention, the chromaticity reduction rate can reach 95% or more, and the COD value can be lowered by 50% or more; and the decolorizer is precipitated out in a precipitate manner and can be removed from the wastewater through filtering.

Description

[0001] Technical field: [0002] The invention relates to the technical field of pesticide wastewater treatment, in particular to a primary decolorizer for high-chroma chemical wastewater treatment. [0003] Background technique: [0004] Most chemical wastewater contains substances with complex structure, toxic and harmful, and difficult to biodegrade. It has the characteristics of high COD, high salinity, high chromaticity and high toxicity. For high-color chemical wastewater, decolorization treatment must be carried out. At present, common decolorization methods at home and abroad include coagulation decolorization, adsorption decolorization, and ozone oxidation. The conventional coagulation decolorization method cannot effectively achieve the effect of decolorization; the main advantage of adsorption decolorization is that the colored substances are removed from the water by adsorption, and the structure of the colored substances is retained during the adsorption process. ...

AI Technical Summary

Problems solved by technology

The conventional coagulation decolorization method cannot effectively achieve the decolorization effect; the main advantage of adsorption decolorization is that the colored substance is removed from the water by adsorption, and the structure of the colored substance is retained during the adsorption process. The adsorbents used include activated carbon, molecular sieve, Activated aluminum, granular activated carbon, diatomaceous earth and sawdust, etc. Among them, activated carbon has long been used as an excellent adsorbent in the treatment of chemical wastewater, and is still the best adsorbent for colored chemical wastewater, but activated carbon is selective for colored substances , and the price is high, and regeneration is difficult; while the ozone oxidation treatment method can not only be used as an oxidation, disinfection and decolorization agent, but also can remove some refractory COD, but ozone needs a certain concentration to function effectively, and the operating cost of the ozone generator higher