预氧化强化微涡流絮凝处理微污染水的优化  

Optimization of Pre-Oxidation Enhanced Micro-Vortex Flocculation in the Treatment of Micro-Polluted Water

作　　者：戴红玲[1,2] 林光强 徐巧玲 贺梦杰 徐琪珂 DAI Hongling;LIN Guangqiang;XU Qiaoling;HE Mengjie;XU Qike(School of Civil Engineering and Architecture,East China Jiaotong University;National Experimental Teaching Demonstration Center of Civil Engineering,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学土木建筑学院 [2]华东交通大学土木工程国家实验教学示范中心,江西南昌330013

出　　处：《水处理技术》2023年第4期115-119,143,共6页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(61872141);江西省自然科学基金资助项目(20192BAB206038)。

摘　　要：针对常规混凝工艺处理微污染水时存在的药剂成本高、出水水质不稳定等问题,对比研究了高锰酸钾、二氧化氯和过氧化氢强化混凝处理微污染水的效果,并采用响应面法(RSM)建立了浊度、UV254及CODMn去除率与流量、混凝剂投加量及预氧化剂投加量间的二次回归模型,研究了各因素间的交互作用对预氧化-微涡流絮凝工艺处理微污染水的影响。结果表明:高锰酸钾在降低颗粒排斥力和去除有机污染物方面优于二氧化氯和过氧化氢;结合Design-Expert软件预测值与验证实验得到最佳工艺参数如下:流量为6.5 m3/h(絮凝时间为15.7 min)、PAC投加量为20.8 mg/L、KMnO_(4)投加量为1.0 mg/L,此条件下浊度、UV_(254)、COD_(Mn)去除率分别为90.69%、69.26%、67.99%。优化后的工艺可为实际应用提供一定参考。In the case of the conventional coagulation process has a high cost of chemicals and unstable effluent quality for the treatment of micro-polluted water.The effects of potassium permanganate,chlorine dioxide,and hydrogen peroxide enhanced coagulation in the treatment of micro-polluted water were compared.The response surface method(RSM)was used to establish the quadratic regression polynomial model between the turbidity,UV254,and CODMn removal rate and the flow rate,the dosage of coagulant and the dosage of pre-oxidant.The effect of interaction among various factors on the treatment of micro-polluted water by the pre-oxidation-micro-vortex flocculation process was studied.The results showed that potassium permanganate was better than chlorine dioxide and hydrogen peroxide in the reduced particle repulsion and removed organic pollutants.Combined with the predicted value of the Design-Expert software and the verification test,the optimal parameters of this process were:flow rate of 6.5 m3/h(flocculation time of 15.7 min),PAC dosage of 20.8 mg/L,KMnO_(4) dosage of 1.0 mg/L,under this condition,the removal rates of turbidity,UV_(254),and COD_(Mn) were 90.69%,69.26%,and 67.99%,respectively.The optimized process can provide some references for the practical application.

关 键 词：预氧化 微涡流絮凝 微污染水 响应面法 工艺优化 

分 类 号：X703[环境科学与工程—环境工程]