摘要
通过对单阀重力反洗直接超滤工艺处理引黄水库原水的中试研究,从超滤膜选型、长期稳定运行的膜污染控制、出水水质和运行成本4个方面分析了直接超滤工艺在农村饮用水工程中的应用效能。针对具有引黄水库原水特质的微污染水源,经直接超滤工艺处理后,出水浊度低于0. 1 NTU,水质可稳定达到《生活饮用水卫生标准》(GB 5749—2006)的要求,出水微生物安全性可以得到有效保障;采用超滤技术直接过滤引黄水库原水时,可选用截留分子质量较小的内压式PVC合金超滤膜,同时在反冲洗水中添加10 mg/L的NaClO进行化学强化反冲洗,可使跨膜压差增长速率明显降低,延长维护性化学清洗周期,有效缓解膜污染;另外,长期以10 L/(m^2·h)的低通量工况运行有利于延缓膜污染。该工艺流程简单,管理方便,运行成本约为0. 1元/m^3,适宜在农村地区推广应用。
The single-valve gravity backwashing ultrafiltration ( UF) process was used to treat the raw water from the Yellow River Reservoir, and its effectiveness in rural drinking water projects was analyzed from four aspects: ultrafiltration membrane selection, membrane fouling control, effluent quality and operating cost. The results showed that the effluent turbidity was less than 0. 1 NTU after the direct UF process. The treated water quality could stably meet the requirement of the Standards for Drinking Water Quality ( GB 5749 - 2006 ). The effluent microbiological safety could be guaranteed. When using direct UF technology to treat raw water from the Yellow River Reservoir, an internal pressure PVC alloy ultrafiltration membrane with'a small molecular weight cutoff should be selected. When 10 mg/L of.NaClO was added to enhance backwashing, the growth rate of transmembrane pressure difference could be significantly reduced, the maintenance chemical cleaning cycle could be prolonged, and membrane fouling was effectively alleviated. In addition, long-term operation with low flux of 10 L/(m2 ? h) was beneficial to delaying the membrane fouling. The process had the advantages of simple process and convenient management, and the operating cost was 0.1 yuan/m3, which was suitable for application in rural areas.
作者
李丽
于海宽
吕谋
李圭白
纪洪杰
LI Li;YU Hai-kuan;LU Mou;LI Gui-bai;JI Hong-jie(School of Eiwironmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266000, China;College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China;School of Environment, Harbin Institute of Technology, Harbin 150090, China;Dongying Waterworks Company, Dongying 257091, China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2019年第5期12-18,共7页
China Water & Wastewater
关键词
引黄水库原水
超滤
单阀
重力反洗
膜污染
跨膜压差
化学强化反
冲洗
raw water from the Yellow River Reservoir
ultrafiltration
single-valve
gravity backwashing
membrane fouling
transmembrane pressure difference
chemically enhanced backwashing
