摘要
采用微涡流强化混凝工艺处理低温低浊微污染水,并结合正交试验和CFD数值模拟进行工艺优化。结果表明,微涡流强化混凝对低温低浊微污染水的处理效果较好,浊度去除率可达到70%以上、UV254去除率在40%以上。影响浊度去除率的因素排序为投配比>絮凝时间>加药量;影响UV254去除率的因素排序为投配比>加药量>絮凝时间。通过正交试验得到最优工况如下:第1絮凝反应室设置3/5的HJTM-2型涡流反应器和2/5的HJTM-1型涡流反应器,絮凝时间为12.6 min,加药量为40 mg/L,此时微涡流絮凝工艺对浊度和UV254的去除率分别可达85.6%和59.0%。数值模拟结果与试验结果一致,3/5的HJTM-2型+2/5的HJTM-1型涡流反应器投配组合可在絮凝池上部产生稳定的立体接触絮凝区,降低絮凝池上部涡旋尺度,更有利于低温低浊微污染水的絮凝。
Micro vortex enhanced coagulation process was used to treat low temperature and low turbidity micro-polluted water.The process was optimized using a combination of orthogonal tests and CFD numerical simulations.The results showed high removal rates in turbidity and UV254,which was reduced by more than 70% and 40%,respectively.The impact on turbidity removal was vortex reactor dosing ratio>flocculation time>coagulant dosage;the impact on UV254 removal was vortex reactor dosing ratio>coagulant dosage>flocculation time.The optimal working condition was using 3/5 of HJTM-2 type vortex reactor and 2/5 of HJTM-1 type vortex reactor in the first flocculation chamber,with a flocculation time of 12.6 min and a coagulant dosage of 40 mg/L.The removal rates of turbidity and UV254 were 85.6% and 59.0%,respectively.The numerical simulations results showed consistent with the experiments.The combination of 3/5 HJTM-2 and 2/5 HJTM-1 vortex reactors was effective in flocculation in low temperature and low turbidity water,since a stable three-dimensional contact flocculation zone was formed,and the reduction of vortex scale occurred at the top section of the flocculation tank.
作者
王艺
戴红玲
周政
胡锋平
邱祖民
徐巧玲
胡文杰
WANG Yi;DAI Hong-ling;ZHOU Zheng;HU Feng-ping;QIU Zu-min;XU Qiao-ling;HU Wen-jie(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China;School of Resources Environmental&Chemical Engineering,Nanchang University,Nanchang 330031,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第23期41-47,52,共8页
China Water & Wastewater
基金
江西省自然科学基金资助项目(20192BAB206038、20181BAB206037)
国家自然科学基金资助项目(61872141)
江西省研究生创新专项资金资助项目(YC2018-S241)
关键词
低温低浊微污染水
微涡流絮凝
工艺优化
计算流体力学
low temperature and low turbidity micro-polluted water
micro vortex flocculation
process optimization
computational fluid dynamics(CFD)
