A device and method for synchronously treating high-concentration no3--n wastewater, sludge digestate and urban 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 waste water, sludge digestate and urban sewage process technology, belonging to the technical field of sewage biological treatment. Background technique

[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, when the traditional denitrification process treats this type of wastewater, it needs to add a large amount of chemicals to provide organic carbon sources, which greatly increases the operating cost, and produces a large amount of excess sludge, which further increases the treatment cost.

[0003] In recent years, Anaerobic Ammonium Oxygenation (ANAMMOX), 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 techno...

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