• 关键词：印染废水  光催化氧化  SBR

• 基金项目：

• 徐高田
• 上海大学环境科学与工程系 上海 200072

• 校华
• 上海大学环境科学与工程系 上海 200072

• 曾旭
• 上海大学环境科学与工程系 上海 200072

• 徐静
• 上海大学环境科学与工程系 上海 200072

• 摘要：采用纳米"TiO₂光催化-SBR"联合工艺对印染废水进行处理.实验所用装置为自行设计的"TiO₂光催化-SBR"装置,利用偶联剂法将纳米TiO₂附着于聚丙烯多面小球表面作为催化剂.光催化降解阶段以催化剂使用量、pH值和溶解氧(DO)为因素进行正交实验,最佳处理工况为1000个催化剂填料、pH值为8.0、溶解氧浓度为4.0mg·L^-1 ;在SBR处理阶段主要考察反应器曝气时间以及沉淀时间对处理效果的影响,其最佳曝气时间和沉淀时间分别为2.5h、1h.实验结果表明,最终出水的色度、COD_Cr和BOD₅去除率分别为90%、85%和94%.

• Abstract：TiO₂ photocatalysts and SBR combined technology were applied to treat dyestuff wastewater.The catalyst was a polyhedral ball of polypropylene to which TiO₂ was chemically coupled.In the photocatalytic stage,an orthogonal experiment was designed to address different factors such as dosages of photocatalyst,pH values,and DO values of the wastewater.The experimental results show that the optimal operating parameters for photocatalytic treatment were 1000 units of catalyst,pH_8.0 and DO_4.0 mg·L^-1 .In the SBR stage,the effects of aeration and sedimentation time on the treatment of dyestuff wastewater were investigated and optimized at an aeration time of 2.5 h and a deposition time of 1 h.The removal rates of color,COD_Cr and BOD₅ in the ultimate outlet water were 90%,85% and 94%,respectively.

• Key words：dyestuff wastewates  photocatalytic technology  SBR

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