Special biological stuffing for simultaneous nitrification and denitrification sewage treatment process

Abstract

The invention relates to special biological stuffing for a simultaneous nitrification and denitrification sewage treatment process. The special biological stuffing comprises a load-bearing center layer positioned in the center, an expanded fiber layer positioned at the periphery of the load-bearing center layer, and a braiding layer positioned between the load-bearing center layer and the expandedfiber layer and used for firmly binding up the expanded fiber layer at the periphery of the load-bearing center layer; and the expanded fiber layer comprises a first fiber layer, a second fiber layerand a third fiber layer arranged in sequence from interior to exterior and having density gradually reduced. According to the biological stuffing, different areas for dissolved oxygen are formed under the same aeration working conditions of the identical water body, the function just can enable aerobic bacteria and anaerobic bacteria with an appropriate ratio to survive simultaneously in the identical water body, and nitrification and denitrification are realized in a common biochemical pool under the condition of not constructing a special nitrification and denitrification reactor, so that the treatment cost, which is caused by the simultaneous nitrification and denitrification reactor with a complex construction structure, is reduced greatly.

Description

technical field [0001] The invention relates to a biological filler specially used in synchronous nitrification and denitrification sewage treatment process. Background technique [0002] At present, the treatment of high-nitrogen wastewater needs to go through two processes of nitrification and denitrification. With the discovery of simultaneous nitrification and denitrification, the simultaneous nitrification and denitrification high-nitrogen wastewater treatment process is widely used. Compared with traditional processes, this process consumes less oxygen. , the organic carbon source consumption is small, and the sludge discharge is small, but the simultaneous nitrification and denitrification high-nitrogen wastewater treatment process has strict requirements on dissolved oxygen and requires the formation of a dissolved oxygen gradient in the same water body. Traditional biological fillers do not have this ability and need to be built The synchronous nitrification and den...

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Problems solved by technology

[0002] At present, the treatment of high-nitrogen wastewater needs to go through two processes of nitrification and denitrification. With the discovery of simultaneous nitrification and denitrification, the simultaneous nitrification and denitrification high-nitrogen wastewater treatment process is widely used. Compared with traditional processes, this process consumes less oxygen. , the organic carbon source consumption is small, and the sludge discharge is small, but the simultaneous nitrification and denitrification high-nitrogen wastewater treatment process has strict requirements on dissolved oxygen and requires the formation of a dissolved oxygen gradient in the same water body. Traditional biological fillers do not have this ability and need to be built Synchronous nitrification and denitrification reactor with complex structure is expensive and increases the processing cost of enterprises

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