微污染水库水处理工艺研究

通过中试,研究了生物预处理-常规处理-GAC(或O3-BAC)深度处理以及预加氯一常规处理-GAC(或O3-BAC)深度处理对微污染水库水的处理效果。结果表明,对于可生物降解性较好的原水,采用生物预处理可以明显地改善后续常规处理及深度处理的出水水质。对于氨氯、CODMn和UV254较高的水库水,处理工艺流程中应包括生物预处理或O3-BAC工艺。生物预处理-常规处理-GAC工艺的总处理效果好于预加氯-常规处理-O3-BAC工艺。此外,GAC能吸附氯仿、致突变物。当GAC再生周期过长时,出水的氯仿浓度高于进水,且Ames试验呈阳性。GAC的去臭有效期在16个月以上。

Study on treatment of micro-polluted reservoir water

The treatment efficiencies of biological pretreatment or prechlorination plus conventional treatment and advanced treatments (GAC or O3-BAG) were researched by pilot-plant experiments. When the biodegradability of the reservoir water is high, biological pretreatment can improve effluent quality of following conventional and advanced treatments. In case of reservoir water with high concentrations of ammonia nitrogen, CODMn, and UV254, the process of the biological pretreatment or O3-BAC advanced treatment should be applied. The total efficiencies of the flow sheet of biological pretreatment, conventional treatment and GAC advanced treatment is higher than that of the flow sheet of prechlorination, conventional treatment and O3-BAC advanced treatment. The GAC advanced treatment can only adsorb the chloroform and mutagenics. When the GAC regeneration period is too long, then the chloroform concentration of the effluent is higher than the influent and Ames test of the effluent is positive. The period of effective odor removal by GAC is longer than sixteen months.