Pharmaceutical wastewater, as the name implies, is the wastewater produced by pharmaceutical factories when producing Chinese patent medicine or western medicine. Pharmaceutical wastewater mainly includes antibiotic production (biopharmaceutical) wastewater, synthetic drug production (chemical pharmaceutical) wastewater, Chinese patent medicine production wastewater, and washing water and washing wastewater of various preparation production processes. The discharged wastewater not only has high concentration of organic pollutants, but also contains various factors that inhibit the growth of microorganisms. If discharged without treatment, it will cause serious harm to water resources, and such wastewater will contain indirect or direct infectious viruses, Bacteria, improper treatment can cause waterborne diseases. Therefore, Capitel Chemical has developed a Polyacrylamide for pharmaceutical plants.
The production process of drugs determines the characteristics of pharmaceutical wastewater. The production of medicines is obtained through the chemical synthesis process and the separation and purification of medicinal plants to obtain raw materials. Because of the different types of medicines, the production processes are different and the processes are complicated, there are many types of raw and auxiliary materials. Although the production process strictly controls the quality of raw materials and intermediates, the materials The low net yield and many by-products lead to large differences in the composition and complexity of the pharmaceutical wastewater. Although there are many pollutants and high COD, the ratio of B0D5 to CODcr is low and fluctuates greatly. The characteristics of strong, intermittent discharge, large fluctuations in water quality and types of pollutants have brought great difficulties to governance.
The coagulation method is a commonly used physicochemical method in the treatment of pharmaceutical wastewater. The indispensable coagulation precipitation is PAM polyacrylamide flocculant, which can quickly and effectively produce suspended particles, drug residues, raw materials, etc. in pharmaceutical wastewater Precipitation reduces the concentration of pollutants and improves the biodegradability of wastewater.
After several studies and tests by Shouxin Chemical technicians, generally cationic polyacrylamide products with higher ionicity are selected for biochemical sludge treatment, and even cationic polyacrylamide with ionicities above 60 are selected if the organic concentration is high. The effect is better, if it is electrolytic treatment or the previous stage of air floatation treatment. According to the quality of sewage, the key technical indicator is to judge the choice of cationic polyacrylamide flocculant by looking at the PH value. Generally, if the pH is less than 7, non-ionic polyacrylamide is often used as a coagulant or sludge concentration Precipitant. If the pH is above 7, anionic Polyacrylamide for pharmaceutical plants is commonly used.
The Instructions:1. Determine the best model and dosage through a small test; 2. The product is formulated into an aqueous solution with a concentration of 0.1-0.3% (referred to as solid content), preferably neutral water without salt 3. When dissolving water, please use this The product is evenly sprinkled into the stirred water, and proper heating (<60oC) can accelerate the solution (the stirring time is about 40 minutes is better); 4. When preparing the polyacrylamide aqueous solution, it should be in enamel, galvanized, plastic or aluminum barrels It should not be prepared and stored in an iron container; 5. When dissolving, the product should be slowly and evenly added to the dissolver with stirring and heating measures to avoid solidification. The solution should be prepared at a suitable temperature , And should avoid mechanical shearing for a long time, it is recommended that the agitator is 60-200 rpm, otherwise it will cause polymer degradation and affect the use effect; 6, PAM aqueous solution should be used for the current, when the solution is long With time, its performance will gradually decrease depending on the water quality;