An improved nitrogen and phosphorus removal biofilm sewage treatment device and method

Abstract

The invention relates to an improved denitrification and phosphorus removal biofilm sewage treatment device and method, comprising a pretreatment system, a biological reaction tank, an MBR membrane tank, a micro-aeration biological reaction tank, a clear water tank, a phosphorus-rich water tank, and a phosphorus removal mixed tank. Condensation and sedimentation high-density tank, sludge treatment system and two-line system; in the first line, the micro-aeration biological reaction tank is respectively connected with the biological reaction tank, the phosphorus-rich water tank, and the MBR membrane tank, and the MBR membrane tank is connected to the The clean water tank is connected, the phosphorus removal coagulation sedimentation high-density tank is connected with the MBR membrane tank, the phosphorus-rich water tank, and the sludge treatment system respectively; in the second casing, the micro-aeration biological reaction tank is connected with the clean water tank, and the MBR membrane The tanks are respectively connected with the biological reaction tank, the micro-aeration biological reaction tank and the phosphorus-rich water tank, and the phosphorus removal coagulation sedimentation high-density tank is respectively connected with the phosphorus-rich water tank, the sludge treatment system and the micro-aeration biological reaction tank. It can solve the problem that the granulation cycle of granular sludge is long and is affected by the flocculation ability of the biological system itself.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an improved denitrification and dephosphorization biofilm sewage treatment device and method. Background technique [0002] In the process of wastewater treatment, nitrogen and phosphorus removal is a problem that needs to be considered in most wastewater biochemical treatment technologies. The mainstream biochemical treatment technology for nitrogen and phosphorus removal at home and abroad is the activated sludge method. The sewage biochemical denitrification process is to create aerobic nitrification and anoxic denitrification environment in time and space to realize the conversion of nitrogen to nitrogen in the water; the sewage biochemical phosphorus removal process is to alternately operate the activated sludge under anaerobic and aerobic conditions , Phosphorus-accumulating bacteria in the sludge release phosphorus in an anaerobic state, take in excess phosphorus...

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Problems solved by technology

[0014] Aiming at the deficiencies in the denitrification and phosphorus removal process in the prior art, the purpose of the present invention is to provide an improved nitrogen and phosphorus removal biofilm sewage treatment device and method, which has reasonable structural design, stable and reliable operation, and can Solve the problem that the granular sludge granulation period is long and is affected by the flocculation ability of the biological system itself, and can ensure the stability of the effluent water quality, etc.

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