Non-aeration baffled synchronous nitrifying and denitrifying type wastewater treatment system and treatment method

Abstract

The invention relates to a non-aeration baffled synchronous nitrifying and denitrifying type wastewater treatment system and a treatment method. The wastewater treatment system comprises a vertical box body, wherein a liquid inlet hole and a liquid outlet hole are respectively formed in the upper end and lower end of the vertical box body; a filler bracket is arranged in the vertical box body, anda baffled water flow passage is formed in the vertical box body from top to bottom; a porous filler is paved at the surface of the filler bracket, a micro-biological membrane is attached to the surface of the porous filler, and the micro-biological membrane consists of an outer nitrifying bacterial micro-biological membrane and an inner denitrifying bacterial micro-biological membrane. The wastewater treatment system has the advantage that the nitrifying reaction and the denitrifying reaction are integrated into one treatment system, and the wastewater permeates into the porous filler under the mutual action of gravity and capillary structure of the porous filler, is in contact with the outer nitrifying bacterial micro-biological membrane to convert the ammonia-nitrogen in the wastewaterinto nitrate and nitrite under the aerobic environment, and then is in contact with the inner denitrifying bacterial micro-biological membrane to convert the nitrate and nitrite in the wastewater intonitrogen gas under the anaerobic environment, and the nitrogen gas escapes from water, so as to reach the nitrogen removal effect of the wastewater.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater treatment system and method for non-aeration synchronous nitrification and denitrification. Background technique [0002] With the rapid development of my country's industrialization and the continuous expansion of urban scale, a large number of nitrogen-containing compounds discharged each year have become one of the important pollutants in the water environment. The quality of the urban environment affects human health. [0003] At present, biological treatment, as the main technology of wastewater treatment plants, can be used to treat nitrogenous wastewater. The process is mainly a series of aerobic bioreactors in the nitrification stage and anaerobic bioreactors in the denitrification stage. The tandem process of aerobic and anaerobic can achieve better denitrification effect, but there are some defects, mainly reflected in the complex system and la...

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Problems solved by technology

However, the system has the problem of slow denitrification rate, the need for an external aeration fan and the resulting large amount of energy consumption, and it is difficult to control the uniformity of microbial film contact with oxygen during the aeration process, and the efficiency and stability of wastewater treatment are difficult. Guaranteed, limited treatment capacity for high-concentration nitrogen-containing wastewater

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