Device and method for synchronously treating high-concentration NO3--N waste water, sludge digestion liquid and municipal sewage

Abstract

The invention discloses a device and method for synchronously treating high-concentration NO3--N waste water, sludge digestion liquid and municipal sewage. The NO3--N waste water and the sludge digestion liquid enter a first short-range denitrification reactor, NO3--N is converted into NO2--N through organic matter and an outer carbon source which are contained in the digestion liquid, and effluent containing NH4+-N and NO2--N enters an anaerobic ammonia oxidation reactor for denitrification; effluent containing nitrate nitrogen and the municipal sewage enter a second short-range denitrification reactor, NO3--N is converted into NO2--N in the presence of an organic carbon source in the municipal sewage, then the municipal sewage flow back to the anaerobic ammonia oxidation reactor, and NO2--N and NH4+-N are synchronously removed. The problems that when the high-concentration NO3--N waste water, the sludge digestion liquid and the municipal sewage are independently treated through a traditional method, the nitrogen removal efficiency is low, energy consumption is high, and the sludge output is high are solved, and according to the device and method, running cost I slow, the occupied area is small, the structure is simple, and optimal control is easy.

Description

Technical field [0001] The invention relates to a synchronous treatment of high concentration NO 3 - -N Wastewater, sludge digestion liquid and urban sewage process technology belongs to the field of sewage biological treatment technology. Background technique [0002] In industrial production (such as explosives, nuclear industry, fertilizer, metal washing, etc.), a large amount of high concentration NO is often produced 3 - -N wastewater. The traditional denitrification process needs to add a large amount of chemicals to provide organic carbon source when treating this type of wastewater, which greatly increases the operating cost and generates a large amount of surplus sludge, which further increases the treatment cost. [0003] In recent years, the anaerobic ammonia oxidation technology, which is widely used in the treatment of high ammonia nitrogen wastewater, has attracted much attention. It is by far the most efficient and energy-saving denitrification technology. Anammox re...

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Problems solved by technology

[0002] In industrial production (such as explosives, nuclear industry, chemical fertilizers, metal washing, etc.), a large amount of high-concentration NO is often produced 3 - -N wastewater, the traditional denitrification process needs to add a large amount of chemicals to provide organic carbon sources when treating this type of wastewater, which greatly increases the operating cost and produces a large amount of excess sludge, which further increases the treatment cost

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