Improved A2/O oxidation ditch processing urban sewage
ABSTRACT
With the acceleration of urban construction and population increases, More and more sewage over the water self-purification capacity. Therefore, building a sewage treatment plant,Through physical and biological methods of sewage treatment and then its emissions. To reduce the burden of self-purification of water, To purify water and protect the environment.[22]
This is a large sewage treatment plants.Design uses improved A2 / O oxidation ditch process.
The wastewater treatment plant for the sewage treatment process: Sewage from the pumping station to the grid, then entering the improved A2 / O oxidation ditch. Convergent flow into the secondary sedimentation tank, Into contact with pool, Finally the water emissions. [21]
Sludge treatment process: Part sludge back from second sink sludge oxidation ditch inside, Then enter the sludge digestion tank, the rest of the sludge from the second pond into sludge pump room. After further dehydration equipment, Finally mud cake Sinotrans.
Its operating costs: If including depreciation charges, 1.11 yuan / t sewage;If excluding the depreciation costs, 0.67yuan / t sewage.
Key words: Improved A2 / O oxidation ditch Sludge Treatment Sewage Treatment