预氧化强化混凝工艺处理南水北调-水库掺混源水

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷期数: 2020年第9期页码: 36-41 栏目: 出版日期: 2020-05-01

Title:: Treatment of Source Water from South-to-North Water Diversion Project Mixed with Reservoir Water by Pre-oxidation

作者:: 时真男^1,2，陈伯俭^1,2，唐锋兵^1,2，李艳平³，碗莹^1,2，成瑞雪^1,2，李思敏^1,2

关键词:: font-size: 10pt; ">预氧化; 混凝; 南水北调源水; 响应面分析; 叶绿素a; 浊度

Keywords:: pre-oxidation; coagulation; source water from South-to-North Water Diversion Project; response surface analysis; chlorophyll a; turbidity

摘要:: 针对邯郸市双水源供水体系，开展了预氧化强化混凝工艺处理南水北调-本地水库掺混源水试验。结果表明，单因素试验得到的PAC、次氯酸钠最佳投加量分别为5~15、0.1~1.0 mg/L，慢速反应搅拌速度以60~100 r/min为宜；采用Box-Behnken法对单因素试验参数进行优化，并建立了响应值为叶绿素a和浊度去除率与PAC、次氯酸钠投加量及慢速反应搅拌速度的二次回归模型，通过Design-Expert软件得到的最优工艺参数如下：PAC投加量为11.85 mg/L、次氯酸钠投加量为0.88 mg/L、慢速反应搅拌速度为67 r/min，此时对叶绿素a和浊度去除率的预测值分别为93.27%、90.79%，与实测值93.26%、90.85%高度接近。

Abstract:: Based on dual water sources of Handan water supply system, source water from South- to-North Water Diversion Project mixed with local reservoir water was treated by pre-oxidation enhanced coagulation process. The optimum dosage of PAC and sodium hypochlorite were 5-15 mg/L and 0.1-1.0 mg/L respectively, and the opitimum stirring speed of slow reaction was 60-100 r/min. The Box-Behnken method was used to optimize the single factor test parameters of the process, and a secondary regression model with the response value(chlorophyll a and turbidity removal rates)and PAC dosage,sodium hypochlorite dosage and slow reaction stirring speed were established. The optimal process parameters obtained by Design-Expert software were as follows: PAC dosage of 11.85 mg/L, sodium hypochlorite dosage of 0.88 mg/L and slow reaction stirring speed of 67 r/min. Under the optimal condition, the predicted removal rates of chlorophyll a and turbidity were 93.27% and 90.79%, respectively, which were close to the measured values of 93.26% and 90.85%.

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更新日期/Last Update: 2020-05-01