Study On Decoloration Of Wastewater From Pharmaceutical Fermentation

Wastewater from Pharmaceutical Fermentation is a kind of high concentrated organic wastewater, which contain a great variety of pollutants and complicated components, particularly high chroma, wastewater whicn is below the emission standard, will cause serious consequences to environment. To promote the development of economic and environmental, the Environmental Protection Agency promulgated a discharge standard of sewage for Fermentation Pharmacy Industry《Discharge Standard of Pollutants from Zymotic Pharmacy Industry》GB 21903-2008, this new standard was strictly for discharge of Wastewater from Pharmaceutical Fermentation, and traditional biological waste treatment processes are not able to meet the discharge demand of Wastewater from Pharmaceutical Fermentation, chroma of the wastewater are unable to achieve emissions standards, chroma is as a routine index in analysis of water quality, often represents a water bodies with specific contaminants, wastewater of high chroma can create an unpleasant impression for people, its discharge cause serious consequences of the ecological environment, so the higher request is given for treatment technique.The subject chooses waste liquor of Ferment and effluent from secondary treatment of pharmacy Wastewater for research. Colour development mechanism of wastewater was preliminary analysed, and a series of experiments and research are performed on the basis of their development color mechanism and wastewater quality, The methods of Fenton reagent, Microelectrolysis, three dimentional electrode were choosen as treatment techniques for waste liquor of Ferment and effluent from secondary treatment, the factors which effect the removal rate of wastewater were systematically researched, the main conclusions are as follows:1) Water sample separated and purified from the waste liquor of Ferment was analyzed by GC-MS, relevant Maillard reaction products was identified by GC-MS, the two results were comparated and discovered that carbonyl group is the main chromophore groups.2) The electrode effluent from secondary treatment was analyzed by IR and UV spectrum. The results of wastewater examined showed that the number of carbonyl group and hydroxyl group decrease greatly after electrolytic treatment, which further substantiate that the carbonyl group is the main chromophore groups. Hydroxyl group may be the auxochrome group. 3) The advanced treatment effect of effluent from secondary treatment by three kinds of processing techniques was systematically studied. The results show that, COD of the outflow by three techniques are 11.4, 28.3, 14.1mg/L, chroma of the outflow are all 20 times, respectively, all of them meet the discharge standards of《Discharge Standard of Pollutants from Zymotic Pharmacy Industry》,GB 21903-2008. By the treatment results, Three dimentional electrode is better than fenton reagent, and the latter is Microelectrolysis, Three dimentional electrode technology is the best one of the three advanced treatment techniques for decolorization of effluent from secondary treatment .4) The research results indicate that Microelectrolysis is not fit to treat waste liquor of ferment. The pretreatment effect of Ferment mother liquor by two kinds of processing techniques is systematically studied. The removal ratios of COD and chroma of the outflow by two techniques are 91.1%,83.7% and 65%,95%, respectively. From the treatment results, three dimentional electrode is better than fenton reagent. Three dimentional electrode technology is the better one of the two pretreatment techniques for decolorization of waste liquor of Ferment.