Combined treatment process of synthesis pharmaceutical wastewater

Abstract

The invention belongs to the technical field of treatment of water, wastewater, sewage, or sludge and particularly discloses a combined treatment process of synthesis pharmaceutical wastewater. The treatment process comprises a pretreatment step and a biochemical treatment step. The pretreatment step comprises the steps that (1) suspended matter is removed through a filter device; (2) the wastewater obtained in the step (1) is recrystallized, and in the cooling process of recrystallization, activated carbon is put into the wastewater; and (3) the wastewater treated in the step (2) is subjectedto ultraviolet radiation and ozone oxidation, wherein the wave length of ultraviolet radiation is 180-200 nm, and the ozone dosage is 0.5-10 g / L. The combined treatment process of the synthesis pharmaceutical wastewater has the better photocatalytic oxidation effect, the biodegradability of the wastewater treated by the pretreatment step is improved, and after treatment, generation of a large amount of the suspended matter is avoided.

Description

technical field [0001] The invention belongs to the technical field of water, waste water, sewage or sludge treatment, and specifically discloses a synthetic medicine waste water combined treatment process. Background technique [0002] Due to the complex composition of raw and auxiliary materials in the pharmaceutical industry and the different production processes of different products, most of the pharmaceutical wastewater has the characteristics of high organic concentration, high chroma, refractory and toxic substances to microorganisms, complex water components, and poor biodegradability. [0003] Pharmaceutical wastewater is mainly divided into biopharmaceutical wastewater, chemical pharmaceutical wastewater and Chinese patent medicine production wastewater. The main pollutants contained in pharmaceutical wastewater are suspended solids (hereinafter referred to as SS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia nitrogen, cyanide and phenol ...

AI Technical Summary

Problems solved by technology

Using the Fenton method to oxidize wastewater has the following disadvantages: ① Although it can oxidize and destroy a variety of toxic and harmful organic substances, it will produce a large amount of suspended solids (mainly iron sludge) after neutralization, which is inconvenient to handle; ② The reaction time is long; ③ Although the Fenton method can effectively oxidize and remove organic matter at room temperature, the first-time treatment still cannot meet the emission standards, and hypochlorite will be used for auxiliary treatment in the follow-up; ④The amount of chemical reagents used is relatively large, and excessive chemical reagents are used Will cause secondary pollution (such as excessive Fe 2+ It will increase the COD value of the treated wastewater and reduce the biodegradability of the wastewater)

Photoinduced oxidation (O 3 Although the / UV) method can avoid secondary pollution and the generation of a large amount of iron sludge, some suspended solids and darker chroma in pharmaceutical wastewater are not conducive to the penetration of ultraviolet light, thus greatly reducing the effect of photocatalytic oxidation

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