Medicine and chemical industry wastewater treatment methods

Pharmaceutical intermediates in the process of purification, first using ultrafiltration technology will be effective ingredients and macromolecular substances such as protein separation, and then adopt two-stage nanofiltration concentrate, condensed the material 100 times. The nanofiltration system for pharmaceutical intermediates intercept rate above 99%. The membrane enrichment process at room temperature to avoid the high temperature damage to materials in the effective ingredients, low molecular weight organic matter through nanofiltration membrane and some inorganic salt by nanofiltration removal, make the products from under 90% to more than 95% purity, product yield is improved, a 200% increase in product value, make the products more competitive in the international market. The enrichment process energy consumption of about seven. 0 KWH/m3, much lower than conventional energy needed for the membrane distillation.

in the pharmaceutical industry wastewater containing a certain amount drugs, these drugs antibiotics have toxicity to microorganisms, in particular, at the same time because of the adding solvent to extraction in the pharmaceutical technology or join other organic ingredients and inorganic salt, lead to the high chroma, high salinity and high concentration wastewater. The traditional biochemical method is difficult to handle. Using membrane separation technology and membrane separation technology with conventional biochemical methods combined membrane bioreactor ( MBR） You can deal with wastewater discharging standard.

lincomycin antibiotics, its wastewater belongs to high chromaticity, high salinity and high concentration of refractory and biological toxicity of the material, usually CODcr content in 10, 000 ~ 80 to 000 mg/L, pH and temperature are often volatile. Because healthy lincomycin can inhibit microbial growth, make routine biochemical method processing efficiency is affected. Again due to the market price is higher lincomycin, separation of lincomycin recycling wastewater using nanofiltration technology, in order to achieve reduce lincomycin inhibition of microbial, reduce subsequent unit processing load and operation costs, and increase enterprise benefit. About 15 000 mg/L for CODcr, lincomycin concentration is about 260 ~ 300 mg/L waste water processing. Interception of lincomycin rate above 90%, CODcr of intercept rate above 70%. For lincomycin content is 1900 mg/L, CODcr is about 75 to 000 mg/L of wastewater, nanofiltration membrane of CODcr and lincomycin intercept rate is above 50%.

is activated sludge membrane bioreactor combined with ultrafiltration or microfiltration constitute a split type or one-piece wastewater treatment plant. The use of membrane separation of component separation intercept function, with membrane separation components instead of the traditional two pond, compulsory implementation spate separation. Membrane module intercept microbes, macromolecular refractory material back or stay in biological reactor, was after the microbial degradation of water and mud separation by membrane module. Compared with the traditional biochemical method has many advantages: save the second pond sludge, and the process is simple, device miniaturization, bioreactor activated sludge is good, high sludge concentration, volume load is greatly improved, the processing efficiency and impact resistant ability also increase accordingly, at the same time improve the biodegradability, general and CODCr, BOD5 and SS removal rate can reach more than 95%, 98% and 99%, respectively, good water quality. Due to the sludge in membrane bioreactor hydraulic retention time is longer, and the process parameters is easy to realize automatic control, makes possible the enrichment of generation time longer nitrifying bacteria, improve the effect of nitrification, less sludge production.

the MBR sludge hydraulic retention time is longer, the sludge concentration is higher, easy domestication, more suitable for high chromaticity, high salinity and high concentration of difficult biodegradation and pharmaceutical wastewater with biological toxicity. MBR can improve the degradation ability of sludge of wastewater treatment, the effluent water quality is better. So as to improve the environment. A traditional Chinese medicine factory waste water quantity of 1000 m3 / d, originally using hydrolysis acidification of anaerobic-aerobic biochemical process, discharge water quality fluctuation is large, often not up to standard. Imported flat membrane MBR after processing, the effluent standard and water quality more stable. Specific indicators are shown in table 2.