水资源与水工程学报

丰凯,顾颖颖,马鲁铭.催化铁/混凝法预处理酸性化工废水pH变化规律及混凝最佳工况研究水资源与水工程学报[J].,2013,24(3):50-53

催化铁/混凝法预处理酸性化工废水pH变化规律及混凝最佳工况研究

Research on optimum coagulation conditions and pH variation of acidic chemical wastewater pretreated by catalyzed iron and coagulation process

投稿时间：2013-01-28 修订日期：2013-03-25

DOI：

中文关键词: 化工废水催化铁混凝法 pH

英文关键词:chemical wastewater catalyzed iron coagulation method pH

基金项目:国家高技术研究发展计划863项目(2009AA063902)

作者	单位
丰凯	上海理工大学环境与建筑学院环境与建筑学院, 上海 200093
顾颖颖	上海理工大学理学院, 上海 200093
马鲁铭	同济大学城市污染控制国家工程研究中心, 上海 200092

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中文摘要:

pH值是催化铁法预处理酸性化工废水主要考察指标,是Fe²⁺产生量和混凝效果的控制因素,为此进行了催化铁预处理化工废水pH值变化和Fe²⁺产生规律及后继混凝效果的研究。结果表明:催化铁反应最适初始pH为2.75,反应时间为1h；混凝反应最佳条件为:Fe²⁺浓度为120mg/L,pH控制在8.0~8.5；系统COD去除率为56.8%,色度去除率为92%；催化铁处理后的化工废水与印染废水混合进行混凝反应的最适宜pH为8.0~8.5。

英文摘要:

The value of pH is the main indicator of catalyzed iron pretreatment of acidic wastewater and is also the controlling factor of Fe²⁺ generation and coagulation effect. Therefore, the change of value of pH, Fe²⁺ concentration and subsequent coagulation of chemical wastewater pretreated by catalyzed iron were studied.The optimum conditions of the pretreatment are 2.75of initial pH and 1hour of reaction time. The best conditions of coagulation reaction are 120mg/L of Fe²⁺ concentration, 8.0-8.5of pH valure. The removal rates of COD and colority are 56.8% and 92% respectively. When the pretreated chemical wastewater and printing and dyeing wastewater after being catalyzed are mixed,the optimum coagulation value of pH is 8.0~8.5.

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