Device for treating sewage by SNAGS-synergetic nitrification and aerobic granular sludge

Abstract

The invention belongs to the technical field of sewage treatment, in particular to an SNAGS-synergistic nitrification aerobic granular sludge sewage treatment device. The device comprises an anaerobictank, an anoxic tank, an aerobic tank, a filter tank and a gas stripping reflux device, which are sequentially arranged in a water inlet direction; a sedimentation tank is arranged at one end, closeto the filter tank, in the aerobic tank; supernatant precipitated in the precipitation tank overflows and then flows into the filter tank; discharging from a water outlet pipe at the bottom of the filter tank after filtering; the gas stripping reflux device mainly comprises a first reflux pipe, a second reflux pipe and two gas stripping pipes; mixed liquid in the aerobic tank flows back to the front end of the anoxic tank through a first return pipe. The device overcomes the defects in the prior art, adopts an aerobic sewage treatment technology taking biochemical reaction and precipitation integration as a core; wherein the biochemical pool and the precipitation pool are combined at high efficiency and a gas stripping technology is employed to replace a pump structure, so that the devicereduces the use cost and occupied area, is more convenient in control method, and is suitable for small and medium-sized urban domestic sewage and river water treatment.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a device for treating sewage with SNAGS-coordinated nitrification and aerobic granular sludge. Background technique [0002] As the biochemical treatment technology becomes more and more mature, the sewage treatment method of water intake-pretreatment-biochemical tank-sedimentation tank is more and more widely used in urban sewage treatment. The main objects of sewage treatment are organic matter (COD), ammonia nitrogen, total nitrogen and phosphate. The removal of COD, ammonia nitrogen and total nitrogen is generally accomplished by biological oxidation and nitrification / denitrification. [0003] At present, due to the influence of its structure, the relatively common sewage treatment device has a large number of equipment types inside the device, a large total project investment, and a large floor area, so the cost of popularization and use is relatively h...

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Problems solved by technology

[0003] At present, the relatively common sewage treatment devices are affected by their structure. There are many types of equipment inside the device, the total project investment is large, and the floor area is large. The cost of popularization and use is relatively high.

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