Processing method of high density organic process wastewater in production of amprolium hydrochloride

Abstract

The invention discloses a comprehensive processing method of high density organic process wastewater in the production of amprolium hydrochloride. The comprehensive processing method comprises the following steps: cooling and naturally setting the process wastewater, separating a water phase and an organic phase, getting the organic phase back to a production process, obtaining the preliminary processed wastewater by carrying out underpressure distillation and neutralization on a water phase, adding a proper amount of a flocculating agent and a filter aid, and filtering; respectively obtaining a saturated adsorption resin and an adsorption solution after that the preliminary processed wastewater goes through an adsorption tower, and obtaining a steam condensate and a crude product of sodium chloride by carrying out vacuum condensation on the adsorption solution, wherein the steam condensate which accords with technological water requirements of amprolium hydrochloride can be treated as process water to return to a production workshop to be reused; and obtaining a sodium chloride product by carrying out rinsing refining on the crude product of sodium chloride. The processing methodof the present invention, which allows the sewage discharge capacity and the wastewater pollution load to be reduced, and useful resources in the wastewater to be simultaneously recovered, allows theorganic combination of wastewater treatment and resource recovery to be realized.

Description

technical field [0001] The invention relates to the field of organic fine chemical wastewater treatment, in particular to a method for treating high-concentration organic process wastewater produced in the production process of the anti-coccidiosis veterinary drug-amprolium hydrochloride and resource reuse thereof. Background technique [0002] Amprolium Hydrochloride, also known as 1-(4-amino-2-n-propylpyrimidine-5-methylene)-2-methylpyridine chloride hydrochloride. The product is used in chickens, rabbits, calves and lambs, and is effective against Eimeria tenella and cocciformis in chickens, as well as coccidia in lambs and calves. It is suitable for compounding with other drugs and can be used as water-soluble powder or premix. It is the main anti-coccidiosis drug for laying hens. The product has low toxicity, large safety range, small residue and no withdrawal period. Combined use with oxababate and sulfaquinoxaline can expand the anti-coccidiosis effect, and also has...

AI Technical Summary

Problems solved by technology

[0016] 1. Wastewater contains a large amount of inorganic salt and high concentration of alkali will reduce the microbial respiration rate, thereby affecting the degradation efficiency of organic pollutants in the treatment system

[0017] 2. Wastewater contains a large amount of aminopyrimidine heterocyclic compounds, which have poor biodegradability. Although strong oxidation pre-degradation through physical and chemical methods can improve biodegradability, it needs to consume a large amount of sulfuric acid, hydrogen peroxide, iron filings and active carbon, which is expensive to dispose of

[0018] 3. The useful resources in the wastewater cannot be recycled

[0019] 4. The unorganized discharge of irritating volatile organic compounds in the process of wastewater treatment destroys environmental quality and affects human health

Images