Nitrogen and phosphorus removal MBR integrated device using submerged blower and sludge return

Abstract

The invention discloses a nitrogen and phosphorus removal MBR integrated device using a submerged blower and sludge return. The device comprises an adjustment tank connected to a sewage pipe network,the adjustment tank is connected to a water inlet in an anoxic zone through a sewage lifting pump, sewage flows into an aerobic zone through a water outlet in the anoxic zone through an opening of thebottom of a partition plate, the sewage in the aerobic zone is pushed into a film zone through hydraulic power, a water outlet of the film zone is connected to a self-priming pump through a pipe, a water outlet of the self-priming pump is connected to a final discharge pipe through a pipe, the front end of the film zone is provided with a sludge return pump, the sludge is returned into the anoxiczone, the aerobic zone and the film zone are respectively connected to an air outlet of the submerged blower and are subjected to aeration, the submerged blower is installed on a damping cushion, anair inlet of the submerged blower passes through a filter screen and enters the blower, and air inlet and outlet pipes are provided with silencers and flexible connection members. The device has a reasonable structure, reduces film pollution, reduces backwash frequency and prolongs a service life of the film.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an integrated MBR device for realizing denitrification and dephosphorization by using a submerged fan and sludge return flow. Background technique [0002] With the widespread application of MBR integrated sewage treatment equipment, the operation, daily maintenance and effluent water quality of MBR equipment are increasingly concerned and required by users, especially the effluent water quality of the equipment (Class A standard) and membrane maintenance. Suspected of. This situation has seriously hindered the promotion of MBR integrated equipment. After in-depth research on the main components used in MBR equipment and the factors affecting the water quality, we found that: 1. The maintenance of the blower is too frequent, and the air blown by the blower contains a lot of lubrication Oil, the reason is that the blowers used in MBR integrated equipment are all water blowers (oft...

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Problems solved by technology

This situation has seriously hindered the promotion of MBR integrated equipment. After in-depth research on the main components used in MBR equipment and the factors affecting the water quality, we found that: 1. The maintenance of the blower is too frequent, and the air blown by the blower contains a lot of lubrication Oil, the reason is that the blowers used in MBR integrated equipment are all water blowers (often using rotary blowers), which require artificial regular maintenance (check the oil volume of the oil tank once every half a month, if there is no lubricating oil, it will cause The fan pulls the cylinder and can only be replaced), and this fan blows out the lubricating oil in the oil tank with the air while aerating the organisms and membranes, which leads to an increase in the oil content in the water (not easy to degrade), and at the same time accelerates Membrane pollution (grease adheres to the surface of the membrane); 2. The water quality of the equipment effluent is not up to standard, often caused by excessive ammonia nitrogen

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