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1兰州站供水工程1975年,兰州站区给水水源取用黄河水,取水口设在黄河兰州段的雁儿湾附近。由于黄河水的特性,在设计中针对黄河高浊度水的特性,净化流程和一般水源的净化流程有较大的区别,采用了20世纪70年代中期开发的水旋澄清工艺,共设水旋澄清池3座,总处理能力10 000 m3/d,运转良好。处理工艺如下:取水泵站—水旋澄清—无阀过滤—消毒—加压—用户。随着用水量的增加和黄河兰州段水污染的加剧,原有的处理设施及处理工艺已不能满足要求。1985年对原水厂进行了改造,设计处理能力30 000 m3/d,针对黄河兰州段主要污染物质是挥发酚、化学需氧量、生化需氧量、石油类、重金属离子等的特点,设计采
1 Lanzhou station water supply project In 1975, Lanzhou station water supply access to the Yellow River water, water intake located in the Yellow River Lanzhou section of Yan Erwan nearby. Due to the characteristics of the Yellow River water, the characteristics of the high turbidity water of the Yellow River in the design are quite different from the purifying processes of the general water source. The water spin clarification process developed in the mid-1970s was used, Three clarification ponds with a total capacity of 10 000 m3 / d and working well. Treatment process is as follows: Water pumping station - water spin clarification - valveless filtration - disinfection - pressure - users. With the increase of water consumption and the aggravation of water pollution in Lanzhou section of the Yellow River, the original treatment facilities and treatment processes can no longer meet the requirements. In 1985, the original waterworks was rebuilt with a design capacity of 30,000 m3 / d. According to the characteristics of the main pollutants in the Lanzhou section of the Yellow River including volatile phenol, chemical oxygen demand, biochemical oxygen demand, petroleum and heavy metal ions,