Enhanced denitrification system and method for treating low C/N municipal sewage continuous flow

Abstract

The invention discloses an enhanced denitrification system and method for treating low C / N municipal sewage continuous flow. The enhanced denitrification system comprises a raw water tank, an enhanceddenitrification device and a sedimentation tank which are connected in sequence; the system further comprises a pre-reaction ammonia nitrogen online sensor, a pre-reaction nitrate nitrogen online sensor, a post-reaction ammonia nitrogen online sensor, a post-reaction nitrate nitrogen online sensor, a pH online sensor, a control system, a stirring device, an aerator, a gas flow meter, an air blower, an anaerobic ammonia oxidizing bacteria suspended filler, an overflow port, a dosing device and a dosing pump. According to the invention, coupling of three denitrification technologies of externalcarbon source denitrification, internal carbon source denitrification and short-cut denitrification coupled anaerobic ammonia oxidation can be realized; the denitrification efficiency is greatly improved, and a certain reference can be provided for new construction of a low C / N urban sewage treatment plant and upgrading and reconstruction of an original sewage treatment plant taking AO / A2O as a main biological treatment process.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and more specifically relates to an enhanced denitrification system and method for treating continuous flow of low C / N urban sewage, especially suitable for new urban sewage treatment plants and existing AO / A 2 O Upgrading of sewage treatment plants as the main biological treatment process. Background technique [0002] At present, the pollution situation of natural water bodies in my country is severe, and urban sewage treatment plants are an indispensable part of solving urban water pollution problems. In order to further control water pollution, my country's urban sewage discharge standards are also increasing. In order to achieve high-quality effluent water quality under the condition of low C / N value of urban sewage in my country, urban sewage treatment plants input a large amount of energy and carbon source chemicals. The operating cost remains high, and problems such as...

AI Technical Summary

Problems solved by technology

In order to further control water pollution, my country's urban sewage discharge standards are also increasing. In order to achieve high-quality effluent water quality under the condition of low C / N value of urban sewage in my country, urban sewage treatment plants input a large amount of energy and carbon source chemicals. High operating costs and problems such as a large amount of excess sludge and odor are generated, making it difficult to achieve sustainable development

The main biological treatment process most widely used in domestic and foreign large-scale sewage treatment plants is the traditional AO / A 2 O process, using the traditional nitrification and denitrification process to remove nitrogen in sewage, this process has problems such as backward technology and high operating costs

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