印染廢水處理論文外文翻譯1-其他專業(yè)-在線瀏覽
2025-03-24 08:07本頁面
【正文】 ing and Dyeing Wastewater Treatment and Trends traditional methods and process improvement Adsorption Assay suitable for lowdepth treatment of dyeing wastewater with low investment, which is simple and low cost, suitable for small and medium sized printing and dyeing wastewater. Traditional activated carbon adsorbent is mainly activated carbon only cationic dyes, direct dyes, acid dyes, reactive dyes and other watersoluble dye has good adsorption properties, but not removal of colloidal hydrophobic dyes, and the high cost of renewable so that the application of activated carbon is limited. In recent years, research focused mainly on the development of new adsorbents and new adsorbent for improvement on the traditional side. Coagulation Coagulation with low investment costs, equipment, small footprint, processing capacity, decolorization rate and so on. Coagulants are inanic coagulants, anic coagulants and biological coagulant. Traditional coagulation decolorization efficiency on hydrophobic high. It requires change with changes in feed water quality conditions, the decolorization effect of hydrophilic poor, COD removal rate. How to choose an effective coagulation process and efficient coagulant, it is the key to the technology. Chemical Oxidation Study of chemical oxidation is more mature approach. Oxidant monly used Fenton reagent (Fe2, H2O2), ozone, chlorine, sodium hypochlorite, etc.. According to the different oxidants, chemical oxidation can be divided into: ozone oxidation and Fenton39。 biofilm decolorization of dyeing wastewater than the activated sludge process. However, there are three biological methods can not solve its own problems: ① Department of residual sludge in higher costs。 ③ sometimes necessary to add a frontend to improve its wastewater biodegradability pretreatment, to improve the investment and operating costs. Only a single aerobic biological treatment to remove part of readily biodegradable wastewater anic matter, color can not solve the problem. In order to reduce consumption and waste removal more difficult to degrade anic pollutants in the emergence of anaerobic aerobic treatment process and the new biological technology. Anaerobic aerobic anaerobic process can start with the acid production phase to remove part of the easily degradable anic pollutants, degradation of macromolecules will be more difficult to depose anic matter to simpler anic molecules, and through aerobic biological treatment process to further remove. Anaerobic aerobic treatment of biodegradable wastewater was difficult with the removal of pollution, high efficiency, stable and strong resistance capacity and so on. Studies have reported that anaerobic aerobic process of dyeing wastewater, the influent CODcr to 1085mg / L, BODS to 315mg / L in the case, both the removal rate up to and , respectively, and then by fluidized bed natural oxidation and coagulation treatment to remove suspended solids, water up to emission standards. The traditional biological method of color removal is often not ideal, many domestic and foreign scholars dedicated to nurturing highdegradation activity of ba
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