JOHNSON SCREEN For Pharmaceutical Factory
Pharmaceutical wastewater has gradually become one of the important pollution sources. Because of its complex composition, high organic content, high toxicity, deep color and high salt content, especially its poor biochemical property and intermittent discharge, compared with the wastewater from coal industry, it is more difficult to treat.
The production process of chemical pharmacy consists of the production of APIs and pharmaceutical preparations. APIs are obtained through chemical synthesis process and separation and purification of medicinal plants.
The characteristics of the production process are: long production process and complex process; many kinds of raw and auxiliary materials, high quality standards of intermediates and products in the production process, strict quality control of raw materials and intermediates; low net yield of materials, many by-products and three wastes.
The wastewater produced by chemical pharmaceutical enterprises in industrial production is one of the most polluted and difficult to treat industrial wastewater in China. It has the characteristics of high content of organic matter and inorganic salt, low ratio of BOD5 and CODcr and large fluctuation, poor biodegradability, intermittent discharge and large fluctuation of water volume.
Classification of sewage
- High concentration organic wastewater without harmful substances and easy to be biodegraded, such as food industry wastewater.
- High concentration organic wastewater containing harmful substances and easy to be biodegraded, such as some pharmaceutical and chemical industry wastewater.
- High concentration organic wastewater containing harmful substances and not easy to be biodegraded, such as organic chemical synthesis industry and pesticide wastewater.
Because it is difficult to meet the economic and technical requirements of purification treatment by using common wastewater treatment methods, the research on purification treatment, recovery and comprehensive utilization of high concentration organic wastewater has gradually become one of the hot research topics in the international environmental protection technology.
Treatment technology classification
The treatment technologies of pharmaceutical wastewater can be summarized as follows:
Biological treatment, chemical treatment, physical and chemical treatment, physical treatment and other four methods, each of which has its own advantages and disadvantages.
Biological treatment technology
Chemical treatment technology is a method to transform pollutant components in wastewater into harmless substances by applying chemical principles and chemical actions, so as to purify wastewater. Its unit operation process includes neutralization, sedimentation, oxidation-reduction, catalytic oxidation and incineration, etc.
Physicochemical treatment technology
Physicochemical treatment technology refers to the treatment technology that the pollutants in wastewater can be removed through the change of phase transfer in the treatment process. The common unit operations include extraction, adsorption, membrane technology, ion exchange, etc.
(We can provide filter element services for example switches – resin trap filter)
Physical processing technology
Physical treatment technology refers to the treatment method of using physical function to separate dissolved substances or turbid substances in wastewater to change the composition of wastewater.
Such as grid (wedge wire screen), sedimentation (grit), filtration, microfiltration, air flotation, centrifugal (swirl) separation and other unit operations, it has become the basis of wastewater treatment process, and is relatively mature at present.
Although the above treatment technology has been developed for more than 100 years, it is very difficult to treat pharmaceutical wastewater because of its complex composition, high organic content, high toxicity, deep color and high salt content, poor biochemical performance and intermittent discharge.
Pharmaceutical industry wastewater mainly includes antibiotic production wastewater, synthetic medicine production wastewater, Chinese patent medicine production wastewater, and washing water and washing wastewater in the production process of various preparations.
Due to the variety of raw materials and processes, and the diversity of wastewater quality, there is no mature and unified treatment method for pharmaceutical wastewater. The specific choice of process depends on the nature and characteristics of wastewater.