Six new pharmaceutical extraction process of wastewater treatment methods
Chemical synthetic drug produce serious pollution is the cause of the synthesis process is longer and more reaction steps, formation of raw materials for chemical structure of the products only account for 5% of the raw material consumption -
15%, auxiliary raw materials but for the most part accounts for the consumption of raw materials, such as the material in the waste water, waste gas and waste residue in the form of existence.
Chemical synthetic pharmaceutical wastewater of point source mainly includes: 1.
Phase inversion of industrial wastewater, such as all kinds of crystal mother liquor, liquor, such as adsorption raffinate 2.
Washing wastewater, including reactor, filter, catalyst carrier, resin, equipment and materials such as washing water and the ground, appliance, washing wastewater etc. ;
Recovery of residual liquid, including the solvent recovery of residual liquid, by-product recovery and liquid, etc. ;
Auxiliary process wastewater, such as seal water, water, etc. ;
The factory life waste water.
chemical synthetic pharmacy wastewater mainly comes from the reactor cleaning water, cleaning water including the unreacted raw materials, solvents, and generated compounds with different chemical reactions.
the pharmaceutical wastewater characteristics 1.
The change of water quality, water quantity of wastewater, 2.
Contains many biological degradable material and microbial growth inhibitor;
Chemical synthesis pharmaceutical wastewater COD and SS, high salt content, main pollutants for organic matter, organic matter such as fat, benzene, alcohols, esters, petroleum, ammonia nitrogen, sulfur and various kinds of metal ion, etc.
in the pharmaceutical industry wastewater including production wastewater and synthetic drug production wastewater, proprietary Chinese medicine production waste water and all kinds of preparations of the production process of washing water and flushing wastewater four categories.
The wastewater is characterized by complicated composition, toxicity of high organic matter content, large, deep chromaticity and high salt content, especially the biological sex is very poor, and intermittent discharge, difficult to deal with industrial waste.
With the development of China's pharmaceutical industry, pharmaceutical wastewater has become one of the important sources of pollution, how to deal with this kind of wastewater is a difficult problem in today's environmental protection.
several common pharmaceutical wastewater treatment the pharmaceutical wastewater treatment method can be summarized as the following: the physico-chemical treatment, chemical treatment, biological treatment, and the combination of a variety of methods, etc. , all kinds of processing methods have their advantages and disadvantages.
according to the water quality characteristics of pharmaceutical wastewater, the treatment process requires a materialized as pre-processing or post-processing of biochemical treatment process.
The current application of physical and chemical treatment including coagulation, air flotation, adsorption, extraction, electrolysis, ion exchange and membrane separation, etc.
1. the coagulation method technology is widely used at home and abroad of a water treatment method, it is widely used in pharmaceutical wastewater pretreatment and post-treatment process, such as aluminum sulfate and polymeric ferric sulfate used in traditional Chinese medicine wastewater, etc.
Efficient coagulation treatment is the key to properly choose and adding the excellent performance of coagulants.
Coagulants in recent years to polymerization by low molecular polymer is the development direction of development, the development from the component function is simple to complex.
Liu Minghua etc, with its developed a highly efficient composite flocculant F -
1 urgent bronchitis syrup production wastewater treatment, in the pH of 6.
5, flocculant dosage is 300 mg/L, the effluent COD, SS and chroma removal rate reached 69 respectively.
4% and 87.
5%, its performance is superior to PAC (
Powder activated carbon)
, polyacrylamide (
Such as single flocculant.
2, air flotation, air flotation typically include inflatable air flotation and dissolved air floating, floating chemical gas and a variety of forms such as electricity Japanese floating.
Xinchang pharmaceutical factory the CAF vortex concave air floating device for pharmaceutical wastewater pretreatment, in conjunction with the appropriate reagents, the average removal rate of COD is about 25%.
3, adsorption method commonly used adsorbent is activated carbon, activated coal, humic acid, adsorption resin etc.
Wuhan jianmin pharmaceutical factory using coal ash adsorption and two stage aerobic biological treatment technology in the wastewater treatment.
Results show that the adsorption pretreatment of wastewater COD removal rate of 41.
By 1% and increase the value of BOD5 / COD.
4, membrane separation membrane technology including reverse osmosis, nanofiltration membrane and fiber membrane, recycling useful material, reduce the emissions of organic matter.
The main characteristics of this technology is simple equipment, easy operation, no phase change and chemical change, high processing efficiency and save energy.
Juana, etc of the lincomycin wastewater by nanofiltration membrane separation experiment, found that both reduced the waste water of lincomycin inhibition of microorganisms, and recycled lincomycin.
5, the electric method which wastewater treatment has the advantages of high efficiency, easy to operate and get people's attention, at the same time, electrolytic process and has a good decolorizing effect.
Li ying by electrolysis pretreatment on riboflavin supernatant, COD, SS and chroma removal rate reached 71%, 83% and 67% respectively.
6, extraction extraction method is to utilize extraction agent, through the extraction effect of waste water purification methods.
According to a solvent for the different materials have different solubility properties, soluble in some pollutant in the wastewater can be fully or partially separated.
To cic with does not dissolve in water or wastewater is difficult to dissolve in water solvent (
, make the dissolved some pollutant in the wastewater,
The interface between the two liquid phase extraction agent and waste water into the extracting agent in the purification of wastewater.
Extraction treatment method is generally used in high concentration phenol or containing aniline, benzene, acetic acid and other industrial waste water.