摘要
饮用水源富营养化导致的藻类大量繁殖及藻类代谢物分泌对饮用水质安全造成严重影响，本文以水质安全多级屏障控制与保障的角度，系统总结了饮用水处理、输配与二次供水过程去除与控制藻细胞及其代谢产物的工艺方法。其中，藻细胞灭活、凝聚与絮凝、固液分离（沉淀或气浮）及过滤分离等工艺过程是去除饮用水中藻细胞的主要单元；吸附、氧化等是控制藻细胞代谢产物（藻毒素、geosmin与2-MIB等致嗅微量有机物等）的关键工艺；对于输配与二次供水过程中，对供水系统进行优化设计并提高科学管理水平，这是最为可行的避免藻类生长的途径。在饮用水处理与输配过程以及建筑给水工程中应尽可能去除藻及其代谢产物，并控制由此产生的水质安全风险，从根本上保障饮用水质安全。
The source water eutrophication and the subsequent effects of algae bloom and toxic substances release through algae metastasis have significant influence on drinking water safety. The processes and technologies of removing and controlling the algae and its were discussed for drinking water treatment, distribution and secondary systems. The main units of removing and controlling algae included algae inactivation, coagulation and flocculation, sedimentation/air flotation and filtration for drinking water treatment processes. As for the metastasizing products as toxins, geosmin and 2-MIB, such unit processes as adsorption and oxidation were promising for these pollutants removal. The optimized design, maintenance and management was effective and feasible for distribution and secondary supplying systems.
出处
《城镇供水》
2009年第1期29-32,35,共5页
CITY AND TOWN WATER SUPPLY
关键词
饮用水
藻
代谢产物
输配过程
水质安全
drinking water, algae, metastasizing products, water distribution, water safety
