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首页> 外文会议>International Conference on Integrated Water Resources Management and Challenges of the Sustainable Development >Biofilm Effluent Polishing for Removal of Recalcitrant Organics
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Biofilm Effluent Polishing for Removal of Recalcitrant Organics

机译：生物膜污水抛光去除顽钙有机物

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With increasing pollution of rivers by trace industrial and household chemicals and pharmaceuticals, and greater demands for water, the difference between effluent polishing and water treatment is diminishing. Biofilm reactors are increasingly used to treat industrial effluents with difficult components, which have not been effectively removed by the conventional activated sludge types of processes. The reactors have biomass active even at very low concentrations of the target organics, rendering the reactor more efficient for removing trace toxic compounds in water and wastewaters. Biofilm processes are of interest in water and effluent treatment due to their low energy chemical free requirements. Results of on-going research on use of a biofilm process to treat simulated effluents as well as to polish a papermill secondary effluent containing difficult to biodegrade chloroorganics, with pentachlorophenol (PCP) as the target recalcitrant molecule, are reported here. Studies were carried out at several residence times, with analysis of PCP and its metabolites, as well as the biodegrading cultures. The biofilm process has been found very effective for treatment of waters containing PCP, and polishing the papermill effluent, resulting in removal of chloroorganics, by biodegrading them in the oxic and anoxic layers of the biofilms. Biodegradation mechanism studies showed that removal of PCP was by adsorption followed by biodegradation, with biodegradation occurring via reductive dechlorination that was made possible in the anoxic bottom layers of the biofilms.
机译：随着痕量工业和家用化学品和药品的河流污染，越来越大的水需求，污水抛光和水处理的差异越来越少。生物膜反应器越来越多地用于治疗工业污水，难以通过传统的活化污泥类型的方法有效地消除。即使在极低的靶有机物的浓度下，反应器也具有生物质活性，使反应器更有效地去除水和废水中的痕量毒性化合物。由于它们的低能量无需优质要求，生物膜过程对水和流出物处理感兴趣。据报道，对使用生物膜工艺进行生物膜过程以处理模拟流出物的持续研究，以及抛光含有难以生物降解的氯化氯的二级污水，作为靶核科分子的五氯苯酚（PCP）。在几次停留时间进行研究，分析PCP及其代谢物，以及生物降解培养物。已经发现生物膜过程非常有效地治疗含有PCP的水，并通过在生物膜的氧和缺氧层中生物降解，抛光造纸污水，从而使其去除氯。生物降解机制研究表明，通过吸附除去PCP，然后通过生物降解，通过在生物膜的缺氧底层中形成的还原脱氯。

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