A treatment method for chemically synthesized pharmaceutical wastewater

Abstract

The invention discloses a method for treating chemically synthesized pharmaceutical wastewater, which belongs to the technical field of wastewater treatment and environmental protection. The treatment method is a combined process of multiple units, mainly including: catalytic oxidation unit, biochemical property improvement unit, biodegradation unit, biochemical property further improvement unit, and biological advanced treatment unit. The invention has the advantages of reasonable process combination, low energy consumption, high efficiency and stable operation effect, and is suitable for treating waste water produced in the process of complete chemical synthesis and semi-chemical synthesis of pharmaceuticals.

Description

technical field [0001] The invention relates to a method for treating pharmaceutical wastewater, in particular to a method for treating chemically synthesized pharmaceutical wastewater, which belongs to the technical field of environmental protection. Background technique [0002] Chemosynthetic pharmaceuticals refer to the process of using a chemical reaction or a series of chemical reactions to produce pharmaceutical active ingredients, including fully synthetic pharmaceuticals and semi-synthetic pharmaceuticals. Its production process generally involves synthesizing chemical raw materials into pharmaceutical intermediates, then undergoing structural transformation to form target products, and then obtaining finished pharmaceutical products through a series of steps such as separation, refining, centrifugation, and drying. Chemical synthetic drugs can be divided into inorganic synthetic drugs and organic synthetic drugs. Inorganic synthetic drugs are inorganic compounds (...

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Problems solved by technology

[0005] Chinese patent application 201610549158.3 protects a treatment device and method for chemically synthesizing pharmaceutical wastewater, which uses a combination of compound enzymes and microorganisms to accelerate the biodegradation rate of organic substances in wastewater. The compound biological enzyme components used in this treatment method Complicated and cumbersome preparation process, even if high-concentration chemical synthesis pharmaceutical wastewater can be treated and discharged up to standard, but the domestication and commissioning time is as long as four months, which is not conducive to large-scale industrial application

[0006] Chinese patent application 201710259259.1 discloses a pretreatment method for antibiotics in antibiotic pharmaceutical wastewater and a treatment method for antibiotic pharmaceutical wastewater. By adding solid acid to antibiotic pharmaceutical wastewater, the residual antibiotics are hydrolyzed. The removal of single antibiotic potency in simulated antibiotic wastewater, and the treatment of complex wastewater from tetracycline pharmaceutical factories only illustrates the amount of methane produced by anaerobic microorganisms after hydrolysis treatment. In fact, in addition to antibiotic residues in pharmaceutical wastewater, there are There are many polluting components, and the removal of antibiotics alone cannot reduce or eliminate the pollution of this type of wastewater to the environment

[0007] Chinese patent application 201811114940.8 discloses a treatment system and treatment method for high-COD and high-salt pharmaceutical intermediate chemical wastewater. Filtration by two-stage fiber filters leads to increased treatment costs, and is prone to problems such as filter blockage and difficult replacement. Moreover, the COD of treated wastewater is relatively high, and there is still a risk of harming the external environment.

[0008] Chinese patent application 201910896490.0 discloses a treatment process for pharmaceutical intermediate production wastewater, including a pretreatment process, a biochemical treatment process and an advanced treatment process. The process uses a high-pressure still concentration method at the front end to achieve the purpose of wastewater pretreatment. Multi-media filter and activated carbon filtration are used to achieve the purpose of wastewater discharge, which leads to a substantial increase in the treatment cost of pharmaceutical intermediate wastewater

Although this method achieves a high COD removal efficiency, due to the two-stage or multi-stage acid precipitation pretreatment process, the pH value needs to be adjusted to a very low level, and the temperature rise operation is required, which not only increases the energy consumption of the operation, but also easily causes waste water Acid corrosion of processing equipment, which is not conducive to equipment maintenance during operation

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