The production process of chemical medicine consists of the production of raw material medicine and the production of pharmaceutical preparations. The raw material medicine is obtained through chemical synthesis process and separation from medicinal plants. The production process has the characteristics of: lower net material yield, by-products and more, more than three wastes, in particular, the difficulty of wastewater treatment. The waste water produced by chemical pharmaceutical enterprises in industrial production has the characteristics of high content of organic matter and inorganic salts, low and fluctuating BOD5 and CODcr, poor biodegradability, intermittent discharge and large fluctuation of water. One. Pharmaceutical wastewater treatment technology Pharmaceutical wastewater treatment technology can be summarized as the following: biological treatment, chemical treatment, physical and chemical treatment, physical treatment and other four, various treatment methods have their own advantages and disadvantages. Biological treatment technology Biological treatment technology is one of the most important processes in a general organic wastewater treatment system. It uses the metabolism of microorganisms, mainly bacteria, to oxidize, decompose and absorb soluble organic matter and some insoluble organic matter in waste water and convert them into harmless The stabilization of the material so that the water is purified technology. In the process of modern biotechnology, there are mainly aerobic biological oxidation, and endoxygen biodegradation and degradation of anaerobic digestion is widely used, biological treatment technology due to economic feasibility, no secondary pollution, has drawn more and more attention. 2. Chemical treatment technology Chemical treatment technology is the application of chemical principles and chemical effects of pollutants in wastewater into harmless substances, so that wastewater purification methods, the unit operation of neutralization, precipitation, oxidation and reduction, catalytic oxidation and incineration. 3. Physical chemistry processing technology Physicochemical treatment technology refers to the wastewater treatment process through the phase transfer of contaminants to achieve the purpose of removing the treatment technology, commonly used unit operation extraction, adsorption, membrane technology, ion exchange and so on. 4. Physical processing technology Physical treatment technology refers to the application of physical effects to separate dissolved substances in wastewater or emulsions to change the composition of waste water treatment methods, such as the grid (sieve), sedimentation (grit), filtration, microfiltration, air flotation, centrifugation Cyclone) separation unit operation, has become the basis for wastewater treatment processes, is now more mature. Second, antibiotic wastewater treatment technology (A) antibiotic wastewater physical treatment methods Take antibiotic production wastewater treatment as an example. Since antibiotic production wastewater is refractory organic wastewater, residual antibiotics strongly inhibit microorganisms and can cause complex wastewater treatment process, high cost and unstable teaching. Therefore, in the process of antibiotic wastewater treatment, the physical treatment method can be used as a pretreatment method for subsequent biochemical treatment to reduce the suspended solids in the water and reduce the biological inhibitory substances in the wastewater. The current physical treatment methods include coagulation, precipitation, air flotation, adsorption, reverse osmosis and filtration. 1 coagulation method Coagulation method is by adding coagulant by stirring the charge-losing particles in contact with each other floc formed flocs, to facilitate its precipitation or filtration and achieve the purpose of separation. After the agglomeration treatment, not only can effectively reduce the concentration of pollutants, but also the biodegradation of wastewater has been improved. Common coagulants in the antibiotic pharmaceutical industrial wastewater treatment are: polymeric ferric sulphate, ferric chloride, ferrous salts, polyaluminum chloride sulphate, polyaluminum chloride, polyaluminum chloride sulphate, polyacrylamide (PAM), etc. . Precipitation is the use of gravity precipitation separation density greater than water suspended particles separated from the water or removed. 2. Flotation method Flotation method is the use of highly dispersed tiny bubbles as a carrier adsorption of pollutants in wastewater, making it apparent density is lower than water and floating, solid-liquid or liquid-liquid separation process. Usually include inflatable flotation, dissolved air flotation, chemical flotation and electrolysis air flotation and other forms. 3 adsorption method Adsorption method refers to the use of porous solids adsorption of one or more pollutants in wastewater to recover or remove contaminants, so that the wastewater purification method. Commonly used adsorbents are activated carbon, coal, humic acid, adsorption resin. The method has the advantages of small investment, simple process, convenient operation and easy management, and is suitable for process improvement of the original sewage plant. Reverse osmosis method Reverse osmosis membrane is the use of semi-permeable membrane will be concentrated, dilute solution separated by the pressure difference as a driving force, exert pressure over the solution osmotic pressure, to change the direction of natural infiltration, the concentrated solution of water seepage into a dilute solution of a Side, can achieve the purpose of wastewater concentration and purification. (B) antibiotic wastewater chemical treatment methods Photocatalytic oxidation method The technology can effectively degrade the concentration of organic compounds in pharmaceutical wastewater, and has the advantages of stable performance, no selectivity to waste water, mild reaction conditions and no secondary pollution, and has good application prospects. Using TiO2 as catalyst, the fluidized bed photocatalytic reactor was used to treat pharmaceutical wastewater. The photocatalytic activity under different process conditions was investigated. The results showed that the biodegradability of wastewater was improved. However, the photocatalytic oxidation method is still inadequate. At present, the most widely used TiO2 catalyst is highly selective and difficult to separate and recover. Therefore, the preparation of efficient photocatalysts is a prerequisite for this method widely used in the field of environmental protection. Fe-C treatment method Fe-C technology is widely studied and applied a wastewater treatment technology. With pH 3 ~ 6 wastewater as the electrolyte solution, iron and carbon particles countless tiny galvanic cells, the release of extremely active [H], the new ecological [H] with many components of the solution redox Reaction, at the same time produce new ecological Fe 3, new ecological Fe 3 has high activity, generate Fe 3, with the hydrolysis reaction, the formation of Fe 3 as the center of the gel, so as to achieve the degradation of organic wastewater. At room temperature and pressure using the tube length than the indictment of the leaching column with activated carbon-iron filings for the filter layer to Mn2, Cu2 as a catalyst for tetracycline pharmaceutical wastewater treatment results show that activated carbon has a larger adsorption Role, at the same time formed in the tube Fe-c micro-cells, the iron oxide into ferric hydroxide flocculant, solid-liquid separation, turbidity decreased. Chemical treatment methods in the actual application process, excessive use of reagents easily lead to secondary pollution of water, so in the design should be done before the relevant research.