关键词：污水处理； 氧化沟 ； 构筑物
Sewage treatment plant of 50,000t in a southern town of preliminary design
Abstract
The design capacity of 50,000 tons per day, forward to 80,000 tons per day of sewage treatment plant preliminary design.
Oxidation Ditch also known as Cycle aeration tank，is deweloped by the Dutch pasveer in the 50's a biological wastewater treatment technology,belongs activated sludge of a political reform.This technology is used in Carrousel oxidation ditch..
The advantages of Oxidation Ditch：First，process is simple, easy management, and that the process does not require the primary sedimentation tank and sludge digestion tank;Second,working stable,processing effect and the Oxidation Ditch‘s average treatment level of BOD could reach 95%;Once again, oxidation ditch has long hydraulic retention time, long sludge age, large dilution water cycle, less sludge and stable nature;And finally,for long sludge age of oxidation ditch. Generally 20 ~ 30 days, less sludge production so simple to manage, low operating costs. Infrastructure investment, low operating costs.
This design includes wastewater treatment plant process selection, design and calculation of the structures, equipment selection, and the overall layout of the sewage plant preliminary design.
