某污水厂设计倒置AAO工艺(2)

ABSTRACT

The topic of this graduate design is about the design of the sewage treatment plant in the development area of economy and techonology in Da lian City. The technics of the plant is the inverted AAO process. The main task is the primary design of the plant and the shop drawing of the oxidation ditch pond.

The task of the primary design is that a design book、a plan of the plant、the high drawing of the treatment of sludge and sewage; In the single disposal build design, the harvest is that the section plane drawing、the plan and some part magnifying drawings of the inverted AAO process.

The construction of this plant is 70000 ton per day.

The process of the sewage in the plant is that: The sewage runs from pump house to sand sinking pond, enters the pond of sedimentation tank, enters disinfection pond, then enters calculation trough, at last lets out. The process of the sludge is that: Surplus sludge from the sedimentation tank enters concentration pond, enters digestion pong, then it is dehydrated, at last it is carried out of the plant.

The outlet water of the plant meets the level two of the National Sewage Discharge Standard (GB8978-1996).

There is an inverted AAO process prevents sludge from eapending, promots releasing phosphorus ,and strengthens anti-nitration.

Key words：The inverted AAO process, Taking off the nitrogen and the phosphorus