Double-layer composite biological denitrification device and method

Abstract

The invention relates to a double-layer composite biological denitrification device and method, belonging to a sewage treatment technology in environment engineering. The double-layer composite biological denitrification device is orderly provided with a surge tank (3), a distribution reservoir (4), a distribution pipe (5), an upper layer filler region (6), an upper layer pore plate (7), a ventilation region (8), a lower layer filler region (9), a lower layer pore plate (10) and a sludge region (11) from top to bottom, wherein the lower end of a water inlet pipe is connected with a lifting pump; the upper end of the water inlet pipe is connected with the surge tank; a water outlet pipe is arranged in the lower layer filler region; a sludge discharge pipe is arranged in the sludge region; a ventilation hole is arranged in the ventilation region; the lifting pump lifts sewage, so that the sewage enters the surge tank through the water inlet pipe, falls into the distribution reservoir, enters the upper layer filler region after being sputtered through the distribution pipe, enters the lower layer filler region after passing through the upper layer pore plate and the ventilation region, and is discharged by the water outlet pipe through the lower layer pore plate; and sludge generated by the upper layer filler region and the lower layer filler region enters the sludge region, and air passes through the upper layer pore plate through the ventilation hole and enters the upper layer filler region.

Description

technical field [0001] The invention relates to sewage treatment engineering technology in environmental engineering and municipal engineering, is suitable for denitrification treatment of urban sewage, domestic sewage and highly polluted water bodies, and belongs to the technical field of environmental protection. [0002] Background technique [0003] Because the existing sewage treatment technology in my country is difficult to effectively remove phosphorus and nitrogen, the nitrogen and phosphorus pollution discharged from point source pollution has not been fundamentally controlled, the problem of eutrophication in lakes (reservoirs) is becoming more and more serious, and nitrogen pollutants in seven major water systems also exceed the standard The problem. Nitrogen and phosphorus pollution in water mainly comes from domestic sewage and agricultural non-point source pollution, among which domestic sewage is the main source of pollution in many water bodies. my country'...

AI Technical Summary

Problems solved by technology

Compared with slightly polluted water bodies, due to the high concentration of pollutants, COD is around tens to 100 mg / L, it is difficult for general ecological restoration technology to achieve obvious results

However, the concentration of pollutants such as COD in such water bodies is difficult to meet the requirements for the growth of process sludge such as activated sludge process

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