Pharmaceutical factories will inevitably produce pharmaceutical wastewater in the production process, which is also one of
the "old and difficult" problems of pharmaceutical companies.
As far as the types of pharmaceuticals are concerned, including chemical drugs, chemical synthetic drugs, proprietary Chinese medicines, biopharmaceuticals, preparations, etc.
, the wastewater generated by different types of drugs is different, resulting in the characteristics of complex, diverse, and toxic substances in pharmaceutical factories, which are difficult to treat
.
In recent years, under the high-pressure sword of environmental protection, the problem of breaking the situation of pharmaceutical wastewater treatment has become a topic
that pharmaceutical companies have to face.
At present, the commonly used pharmaceutical wastewater treatment methods include physical and chemical treatment, chemical treatment, biochemical treatment and a combination of a variety of methods, and the application principles of different methods are quite different, and they also have their own advantages and disadvantages
.
For example, commonly used physical treatment methods include air flotation, filtration, centrifugation, precipitation, adsorption and other technologies, this method is mainly suitable for pretreatment, can be the residual insoluble or emulsion substances in the wastewater, from the main wastewater treatment, thereby reducing the difficulty of post-treatment, but many pharmaceutical wastewater can not achieve the purpose of rapid removal in this way, nor can it achieve recycling
.
Pharmaceutical wastewater chemical treatment methods include chemical precipitation, neutralization, redox and coagulation, such methods are mainly through the control of reaction conditions and feeding, to achieve the expected purpose, due to the high requirements of the feeding agent, the treatment cost is also more expensive
.
The biological method uses the metabolic action of microorganisms to remove organic pollutants
in wastewater.
Specific methods include activated sludge method, biofilm method, oxidation pond method and sludge digestion, etc.
, the disadvantages are also high cost, and the actual wastewater treatment rate is relatively low
.
Due to the limitations of conventional treatment technology, it can not meet the removal requirements of pharmaceutical wastewater treatment pollutants, so the industry believes that it is necessary to effectively use the existing water pollution treatment technology, and reasonably combine the process, and at the same time introduce new technologies and optimize the technical parameters of the process, so as to minimize the discharge of pollutants, reduce the pollution problem, and at the same time improve the recycling rate of wastewater and save water resources
.
Reverse osmosis membrane technology has emerged in the case of a variety of pharmaceutical wastewater treatment technologies and has been widely used
.
In the wastewater treatment application of the pharmaceutical industry, reverse osmosis membrane technology mainly uses the advantages of external forces to filter the precipitation of impurities, bacteria, microorganisms, etc.
in the wastewater to reduce the mineralization in the water body and reduce the total dissolved solids
.
Compared with other traditional technologies, reverse osmosis technology has strong advantages, including simple process operation, high desalination efficiency, economical use in pharmaceutical water systems, efficient wastewater treatment, ensuring its treatment effect and efficiency, and reducing the overall wastewater reuse cost
.
In recent years, China has strongly encouraged industrial enterprises to implement the guidelines and policies of "energy conservation and emission reduction", and in the environmental impact assessment approval of large industrial enterprise water users, it is clearly required that wastewater must meet the discharge standards, and also clearly require that wastewater must reach a certain reuse rate
.
The industry believes that reverse osmosis membrane technology has low energy consumption, high treatment efficiency, low operating costs, and can effectively reduce wastewater discharge through wastewater recycling, so it is important to improve reverse osmosis membrane technology, and there is a large space
for development in the field of pharmaceutical wastewater treatment in the future.
At present, most of the domestic reverse osmosis membranes rely on foreign technology, and domestic enterprises need to continue to make efforts to break the situation
that membrane technology is monopolized by foreign countries.
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