Comprehensive wastewater treatment method for bismuth pectin bulk drug, acridone acetic acid, acyclovir and thiodipropionate medical intermediate

Abstract

The invention relates to a comprehensive wastewater treatment method for bismuth pectin bulk drugs, acridone acetic acid, acyclovir and thiodipropionate medical intermediates. The method comprises thefollowing steps: 1) performing wastewater desalination; 2) adjusting the pH of the wastewater; 3) carrying out pH acidification treatment on the wastewater; (4) carrying out Fenton reaction; 5) performing wastewater pH back-regulation treatment; 6) performing hydrolytic acidification of the wastewater; 7) performing anaerobic treatment on the wastewater; 8) performing AO reaction; 9) performing secondary precipitation; 10) flocculating and precipitating: adding 10% by mass of PAC and 0.1% by mass of PAM into a flocculation sedimentation tank; enabling the wastewater to react for 0.5 to 1h ina flocculation sedimentation tank; allowing part of sludge generated in the reaction process to flow back to the anoxic tank, enabling residual sludge to enter a sludge tank, and discharging supernatethrough a wastewater up-to-standard discharge pipeline; according to the present invention, the method has characteristics of low cost, convenient operation management, reduced wastewater pollutant concentration, and thus further reaching treatment standard, effective removing COD, BOD and NH3-N, achieving discharge standard, and providing huge social and economic benefits.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a comprehensive waste water treatment method for pectin bismuth raw materials, acridone acetic acid, acyclovir and thiodipropionate pharmaceutical intermediates. Background technique [0002] Chemical synthetic drug production wastewater is characterized by high chemical oxygen demand (COD), low biological oxygen demand (BOD), and high salt content. Among the five types of wastewater discharged from the pharmaceutical industry, chemical synthesis drug production wastewater is currently the most polluted and also the most difficult to treat. The characteristics of the wastewater quality are: : ① special pollutants: aniline; conventional pollutants, namely COD, BOD, suspended solids (SS), chroma, ammonia nitrogen and other pollutants; ② poor biodegradability; ③ waste water contains residual products, reactants, catalysts , solvents, etc., BOD, COD and total suspended solids (TSS) concentra...

AI Technical Summary

Problems solved by technology

[0002] Chemical synthetic drug production wastewater is characterized by high chemical oxygen demand (COD), low biological oxygen demand (BOD), and high salt content. It varies greatly, and most of them contain refractory biodegradable substances and microbial growth inhibitors. Among the five types of wastewater discharged from the pharmaceutical industry, chemical synthesis drug production wastewater is currently the most polluted and also the most difficult to treat. The characteristics of the wastewater quality are: : ① special pollutants: aniline; conventional pollutants, namely COD, BOD, suspended solids (SS), chroma, ammonia nitrogen and other pollutants; ② poor biodegradability; ③ waste water contains residual products, reactants, catalysts , solvents, etc., BOD, COD and total suspended solids (TSS) concentrations are high; ④Waterwater volume and water quality fluctuate greatly; ⑤Wastewater has insufficient nutrient sources, and some components are biologically toxic, which increases the difficulty of biological treatment

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