【摘要】 为提升O₃-BAC深度处理工艺水厂控制三氯乙醛（CH）超标风险能力,以我国南方某水厂常规工艺砂滤池出水和CH典型前体物水溶液为研究对象,分析H₂O₂投加量对O₃/H₂O₂-BAC深度处理工艺削减三氯乙醛生成潜能（CHFP）效能及有机物组成的影响,并确定最佳的工艺参数及CHFP削减机制。结果表明,O₃/H₂O₂-BAC深度处理工艺去除CHFP的最佳工艺参数:H₂O₂/O₃摩尔比为0.5（O₃投加量为1.5mg/L）,此条件下,BAC工艺单元对砂滤出水、腐殖酸、蛋白质及天冬氨酸水溶液CHFP的去除率分别为79.10%、67.12%、70.36%和77.82%,其中,与单独投加1.5mg/L O₃相比,对砂滤出水CHFP的削减效能提高24.91个百分点。此外,H₂O₂的投加,通过增加O₃氧化后水体亲水性有机物浓度,进而强化BAC工艺单元对砂滤出水及CH典型前体物水溶液的CHFP去除。更多还原

【Abstract】 To improve water plant’s ability to control the risk of chloral hydrate（CH）exceeding the standard,the effects of H₂O₂ dosage on the removal efficiency of chloral hydrate formation potential（CHFP）and organic matter composition in the O₃/H₂O₂-BAC advanced treatment process were analysed,and the optimal process parameters and CHFP removal mechanism were determined,based on sand filter effluent of the conventional process of a water plant in southern China and aqueous solutions of typical CH precursors.The results showed that the optimal process parameters of CHFP removal by the O₃/H₂O₂-BAC advanced treatment process were H₂O₂/O₃ molar ratio of 0.5 at O₃ dosage of 1.5 mg/L.Under these conditions,the removal efficiencies of CHFP from sand filtration effluent and aqueous solutions of humic acid,protein and aspartic acidwere 79.10%,67.12%,70.36% and 77.82%,respectively.In addition,the removal efficiency of CHFP in sand filtration effluent was increased by 24.91%,as compared with 1.5 mg/L O₃ alone.Moreover,the concentration of hydrophilic organic matters in the water after O₃ oxidation was improved because of H₂O₂ addition,which in turn enhanced CHFP removal from sand filter effluent and aqueous solutions of typical CH precursors by the BAC process unit.更多还原