Design of water treatment engineering for micro-polluted water source
Abstract
The main task of this design is the preliminardesign of a water supply plantlocated in the south edge of the north temperate zone. The main content of the design includes: the design of water intake engineering and water treatment plant.The design of water treatment plant refers to the location selection of water treatment plant, the determination of water treatment process, the design and calculation of treatment structures and the layout of water plant plane and elevation.The design scale of the first phase of the design is 200,000 m3/d, with river water as the source.The process flow is as follows: rawwater→water intake pumping station → biological contact oxidation tank →tubular static mixer → mechanical flocculation tank → horizontal flow sedimentation tank→ ozone contact tank → activated carbon filter→rapid filter→ clean water tank → the second pumping station. Polyaluminum chloride was used as coagulant and liquid chlorine as disinfectant.The quality of watershould meetStandards for Driving Water Quality(GB 5749-2006).