磁絮凝超滤在反渗透法海水淡化预处理中的应用  

Application of magnetic enhanced coagulation ultrafiltration in seawater pretreatment for RO desalination

作　　者：王捷[1,2] 杨洒洒 刘文彬[1,3] 乔龙胜 王根实 陶正源 

机构地区：[1]天津工业大学环境与化学工程学院,天津300387 [2]天津工业大学天津市水质安全评价与保障技术工程中心,天津300387 [3]天津工业大学省部共建分离膜与膜过程国家重点实验室,天津300387

出　　处：《天津工业大学学报》2016年第6期61-66,共6页Journal of Tiangong University

基　　金：国家自然科学基金面上项目(51378349);天津市科技计划项目(15PTSYJC00230;14ZCDGSF00128)

摘　　要：将磁絮凝超滤膜过滤应用于反渗透法海水淡化预处理工艺.运用Design-Expert8.0软件设计实验,将混凝剂（FeCl3）、磁种（Fe3O4）投加量作为考察因素,以平均絮体粒径作为响应值,确定其最佳投加量.结果表明：FeCl3投加量为25.51mg/L、Fe3O4投加量为5.37mg/L时,平均絮体粒径最大,为790.391μm.相比于常规混凝膜过滤,磁絮凝超滤膜过滤混凝剂的投加量减少了近1/3,平均絮体粒径增加约62μm,跨膜压差增长缓慢,出水水质好,SDI值为1.40-1.65,降低40%左右.The magnetic enhanced coagulation ultrafiltration process was utilized for seawater pretreatment for RO desalina-tion. Beaker tests were designed by Design-expert 8.0, designating dosages of coagulant （FeCl3） and magnetic seeds （Fe3O4） as considering factors and floc sizes as response, were conducted to determine the optimum com-bination dosages of coagulant with magnetic seeds. Results showed that the largest floc size （790.391 μm） was obtained at FeCl3 dosage of 25.51 mg/L and Fe3O4 dosage of 5.37 mg/L. Compared with general coagulation pro-ce ss , the coagulant dosage of magnetic enhanced coagulation decreased by 1/3, while the floc size increased around 62 μm, the TMP grow rate was lower and the quality of permeate was higher with SDI value of 1.40-1.65, which decreased around 40%.

关 键 词：海水淡化 磁絮凝 超滤 反渗透预处理 

分 类 号：TQ138.11[化学工程—无机化工] X55[环境科学与工程—环境工程]