Switching-type intermittent-aeration sewage treatment system and treatment method thereof

Abstract

The invention discloses a switching-type intermittent-aeration sewage treatment system and a treatment method thereof. The sewage treatment system comprises a tank body, a water decanter, a water inlet pipe and an aeration device, wherein the tank body comprises a reaction tank, a settling tank and a partition, a reaction cavity is formed between the settling tank and the reaction tank, and the partition divides the reaction cavity into two reaction zones; the water decanter is arranged in the reaction zones; the water inlet pipe is communicated with the settling tank; the aeration device comprises an aeration fan, a tee valve and an aeration pipe. The treatment method comprises the following steps of: introducing sewage into the settling tank until the sewage overflows into the reaction tank; performing alternate aeration on the two reaction zones so as to ensure that partial nitrification is performed in the two reaction zones alternately; and standing for discharging water. On the one hand, the settling tank is arranged in the reaction tank and the reaction cavity is divided into two reaction zones by the partition, so that anaerobic treatment and aerobic treatment can be sequentially performed on sewage, and the sewage treatment efficiency is improved; on the other hand, aeration is performed on the two reaction zones alternately by virtue of controlling the tee valve, so that partial nitrification is performed in the two reaction zones alternately, the reaction energy is improved, and the energy consumption is reduced.

Description

Technical field [0001] The invention relates to sewage treatment technology, in particular to a sewage treatment system and a treatment method with switchable intermittent aeration. Background technique [0002] The traditional sequencing batch activated sludge method includes SBR (Sequence Batch Reactor) method and periodic activated sludge method CASS (Cyclical Actived Sludge System) formed by deformation of SBR method. [0003] SBR is the abbreviation of Sequential Batch Activated Sludge Process, which is an activated sludge wastewater treatment technology operated by intermittent aeration. Its main feature is orderly and intermittent operation in operation. The core of SBR technology is the SBR reaction tank, which integrates the functions of homogenization, primary sedimentation, biodegradation, and secondary sedimentation into one tank without a sludge return system. Especially suitable for occasions with intermittent discharge and large flow changes. At present, it is wide...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the above-mentioned technical deficiencies, to propose a switching intermittent aeration sewage treatment system and treatment method, and to solve the technology of high energy consumption, poor effect and large floor area of ​​aeration in the process of sewage treatment in the prior art question

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