摘要
以南水北调东线京杭运河水源为研究对象,采用逆向-同向流气浮工艺(CCDAF)进行处理,对运行参数进行了优化实验。结果表明,总絮凝时间8 min为佳,优选混凝剂为聚合氯化铝铁(PAFC)。使用浊度、CODMn作为响应值,利用响应面法(RSM)建立了具有4个变量(即混凝剂投加量、一级混凝速度梯度G1、二级混凝速度梯度G2和气浮回流体积比)的多元二次回归模型,拟合程度较高。根据二次响应模型可知,响应值影响的显著程度为投加量>回流体积比> G1> G2。优化的操作参数:投加量5.0 mg/L,G1为52 s^-1,G2为25 s^-1,回流体积比12%。在该运行参数下浊度和CODMn去除率分别为96.32%和32.45%。可为CCDAF工艺操作提供技术支持。
The source of water from east route of the south-to-north water transfer project(Beijing-hangzhou canal) as the research object, the countercurrentcocurrent dissolved air flotation(CCDAF) was used for the treatment. The experiment of operational parameters optimization was carried out. The results showed that, the optimal flocculation time was 8 min and the optimal coagulant was polyaluminum ferric chloride(PAFC). The turbidity and CODMnas the response value, the multiple quadratic regression model with four variables(coagulant dosage, first-order coagulation velocity gradient G1, secondorder coagulation velocity gradient G2 and air flotation reflux volume ratio) was established by response surface method, the fitting degree was higher.The influence degree for response value was dosage > reflux volume ratio> G1> G2. The optimal operation parameters were as follow, the dosage was 5.0 mg/L, G1 was 52 s-1, G2 was 25 s-1 reflux volume ratio was 12%, the turbidity and CODMnremoval rate were 96.32% and 32.45% respectively. Technical support was provided for CCDAF process operation.
作者
王永磊
刘威
亓华
杜振齐
周安然
WANG Yonglei;LIU Wei;QI Hua;DU Zhenqi;ZHOU Anran(College of Environmental and Municipal Engineering,Shandong Jianzhu University,Jinan 250100,China;Shandong Province City Water Supply and Drainage Water Quality Monitoring Center,Jinan 250021,China;Xintai City Water Supply Co.,Ltd,Xintai 271200,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2019年第12期31-36,41,共7页
Technology of Water Treatment
基金
山东省自然科学基金（ZR2016EEM32）
住房城乡建设部科学技术计划与北京未来城市设计高精尖创新中心开放课题资助项目（UDC2017031612）
山东建筑大学博士基金（XNBS1511）
关键词
逆向-同向流气浮工艺
混凝
聚合氯化铝铁
响应曲面法
优化
countercurrent-cocurrent dissolved air flotation
coagulation
PAFC
response surface methodology
optimization
