预臭氧强化电絮凝—超滤工艺处理微污染窖水  

Pre-ozone Enhanced Electro-flocculation-Ultrafiltration Process for the Treatment of Micro-polluted Cellar Water

作　　者：闵芮 张国珍[1,2] 武福平 王宏伟[3] 王梦茹 周添红 牟海生 MIN Rui;ZHANG Guo-zhen;WU Fu-ping;WANG Hong-wei;WANG Meng-ru;ZHOU Tian-hong;MOU Hai-sheng(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Yellow River Water Environment in Gansu Province,Lanzhou 730070,China;Gansu Road Construction Group Management Co.Ltd.,Lanzhou 730030,China;Lanzhou Veolia Water Group Co.Ltd.,Lanzhou 730070,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070 [2]甘肃省黄河水环境重点实验室,甘肃兰州730070 [3]甘肃省公路建设管理集团有限公司,甘肃兰州730030 [4]兰州威立雅水务集团有限公司,甘肃兰州730070

出　　处：《中国给水排水》2021年第21期41-47,共7页China Water & Wastewater

基　　金：国家重点研发计划项目(2019YFD1100103);国家自然科学基金资助项目(51768031);甘肃省非常规水资源化利用技术重点实验室开放基金资助课题(UWKL-1903)。

摘　　要：针对我国西北村镇地区窖水微污染现状,为保障村民饮用水安全,采用预臭氧强化电絮凝联用超滤工艺处理微污染窖水,分析了单独超滤、预臭氧强化电絮凝及联用工艺对微污染窖水的处理效果。结果表明,在臭氧投量为3 mg/L、极板间距为10 mm、电流密度为26.76 A/m^(2)、电解时间为15 min条件下,联用工艺对污染物的去除率最高,其对COD_(Mn)、UV_(254)、NH_(3)-N的去除率由单独超滤的20.96%、14.20%、13.38%与预臭氧强化电絮凝的58.38%、79.59%、53.91%分别提高至64.92%、83.67%、56.30%,出水水质达到《生活饮用水卫生标准》(GB 5749—2006)对于浊度、COD_(Mn)、UV_(254)、NH_(3)-N四项指标的要求。预臭氧强化电絮凝对原水中大分子有机物和浊度有较高的去除率,可有效减缓后续超滤膜通量衰减、提高膜的使用寿命,联用工艺更适用于农村微污染窖水的净化。In view of the current situated micro-pollution of cellar water in rural areas in Northwestern China,the pre-ozone enhanced electro-flocculation combined with ultrafiltration was applied to treat the micro-polluted cellar water in order to ensure the safety of the drinking water for the villagers,and the actual treatment effects of the ultrafiltration along,pre-ozone enhanced electro-flocculation along and their combined process on the micro-polluted cellar water were analyzed.Under the conditions as follows:ozone dosage of 3 mg/L,electrode spacing of 10 mm,current density of 26.76 A/m^(2) and electrolytic time of 15 min,the combined process had the highest removal efficiency of the pollutants.The removal efficiencies of COD_(Mn),UV_(254) and NH_(3)-N were increased from 20.96%,14.20%and 13.38%of the ultrafiltration and 58.38%,79.59%and 53.91%of the pre-ozone enhanced electro-flocculation to 64.92%,83.67%and 56.30%,respectively,and the effluent turbidity,COD_(Mn),UV_(254) and NH_(3)-N met the requirements of Standards for Drinking Water Quality(GB 5749-2006).The pre-ozone enhanced electro-flocculation had a high removal efficiency of the macro-molecular organics and turbidity in the raw water,which could effectively slow down the subsequent ultrafiltration membrane flux attenuation and prolong the service life of the membrane.The combined process is more suitable for the purification of the micro-polluted cellar water in the rural area.

关 键 词：超滤 预臭氧强化电絮凝 微污染窖水 膜通量 

分 类 号：TU991[建筑科学—市政工程]