A kind of sedimentation superimposed biological contact oxidation combination tank and its treatment process

Abstract

The invention discloses a sedimentation-biological contact oxidation combined pool and a treatment technology therefor. The sedimentation-biological contact oxidation combined pool mainly comprises a mechanical mixing tank, a folded plate flocculation tank, a horizontal sedimentation tank, a biological contact oxidation tank, a lower superimposed disinfection contact tank and a clean water tank. An independent blower room and an independent subsequent biofilter tank are arranged outside the sedimentation-biological contact oxidation combined pool. The sedimentation-biological contact oxidation combined pool is characterized in that through combination of the mechanical mixing tank, the folded plate flocculation tank, the horizontal sedimentation tank, the biological contact oxidation tank, the clean water tank, the subsequent biofilter tank and the blower room as an assistant, biological pretreatment and conventional treatment are integrated so that all sedimentation and filtration functions of the biological pretreatment and the conventional treatment are realized; a pipe system is simplified; and management is convenient. An aerator in the biological contact oxidation tank is used for aeration and oxygen supply so that filler contact oxidation treatment effects and subsequent biofilter tank treatment effects are improved and product water quality of the whole treatment technology is guaranteed.

Description

technical field [0001] The present invention relates to a sedimentation-cleaning superposition biological contact oxidation combination pool of a water supply plant, specifically a sedimentation-clearing superimposition biological contact oxidation combination pool for the removal of high ammonia nitrogen in raw water combined with a water supply plant conventional treatment and pretreatment process and its Processing technology. Background technique [0002] At present, the process combination often used by waterworks for the removal of high ammonia nitrogen is the process of biological pretreatment + flocculation and sedimentation, that is, the biological contact pre-oxidation process is used to improve the water quality of raw water before precipitation, and the conventional process of flocculation and sedimentation filtration and advanced treatment process are adopted subsequently. . In the conventional treatment process of waterworks, mechanical mixing folding plate fl...

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Problems solved by technology

In the conventional treatment process of waterworks, mechanical mixing folding plate flocculation and advection sedimentation tanks are often used, while the application of suspended filler aerated biological oxidation tanks and biological contact oxidation tanks in biological pretreatment is more common. This combination of processes requires biological pretreatment tanks The high ammonia nitrogen load needs to be operated under the condition of high gas-water ratio, which consumes a lot of energy, and is prone to phenomena such as sludge accumulation at the bottom of the biological oxidation tank and plugging of filler sludge. In addition, this process occupies a relatively large area. It is difficult to apply for water plants with relatively tight land

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