Flocculant for treating waste water produced by carbosulfan and its preparation method and application

Abstract

The invention discloses a flocculant for treating waste water produced by carbosulfan and its preparation method and application. The flocculant is composed of zinc-manganese polysilicate solution and carboxymethyl fiber with a mass ratio of 5:1-6 Composite sodium solution, the mass fraction of sodium carboxymethyl cellulose in the sodium carboxymethyl cellulose solution is 1% to 2%, and the molar ratio of Zn, Mn and Si in the zinc manganese polysilicate solution is 1 to 3 :0.5~0.8:1. The flocculant of the present invention has the advantages of low cost, good floc effect, good deposition effect, good stability, and no secondary pollution. The preparation method has the advantages of simple process, convenient operation, low raw material cost, short time consumption, and environmental protection. It is suitable for continuous large-scale batch production and is convenient for industrialization. At the same time, the flocculant is used to treat carbosulfan production wastewater, which can significantly remove triethylamine and sulfide in wastewater, reduce COD, and improve biodegradability. High adaptation value and good application prospect.

Description

technical field [0001] The invention belongs to the field of pesticide wastewater treatment, and relates to a flocculant for treating waste water produced by carbosulfan, a preparation method thereof and an application of the flocculant in pretreatment of waste water produced by carbosulfan. Background technique [0002] Carbofuran belongs to carbamate, one of low-toxic carbofuran varieties, with moderate oral toxicity, low percutaneous toxicity, no cumulative toxicity, no deformity, carcinogenicity and mutagenicity. It has strong lethality, quick effect, and has stomach poisoning and contact killing effects. It is characterized by fat solubility, good systemic absorption, strong penetration, rapid action, low residue, long residual effect, safe use, etc. It is effective for both adults and larvae, and is harmless to crops. [0003] The wastewater generated from the production of carbosulfan is characterized by high toxicity, refractory degradation, and high content of nitr...

AI Technical Summary

Problems solved by technology

In the traditional method of removing sulfide, the chemical oxidation method oxidizes the sulfide in the wastewater into elemental sulfur or sulfate, etc., but it has a strong corrosion risk to equipment and pipelines; the hydrogen sulfide released from the acidification method and stripping method The gas pollutes the environment; the biological method is limited to low-concentration sulfide wastewater and cannot be applied to the removal of high-concentration sulfide

In addition, the applicant found through experiments that single treatment methods such as high-temperature alkaline hydrolysis, Fenton oxidation, and stripping cannot effectively remove the characteristic pollutants triethylamine and sulfide in wastewater, and the biochemical properties of wastewater after treatment Poor sex