Low-carbon sewage enhanced phosphorus removal device and sewage treatment system comprising same

Abstract

The invention relates to the technical field of sewage treatment, and discloses a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system comprising the same. The device comprises a carbon source tank and a two-phase anaerobic phosphorus removal tank, wherein the carbon source tank is connected with the two-phase anaerobic phosphorus removal tank to supply a carbon source to the two-phase anaerobic phosphorus removal tank; the two-phase anaerobic phosphorus removal tank is connected with a sludge outlet of a sedimentation tank so as to receive sludge discharged by the sedimentation tank; the two-phase anaerobic phosphorus removal tank is connected with an anaerobic tank, so that sludge treated by the two-phase anaerobic phosphorus removal tank flows back to the anaerobic tank. According to the invention, under the condition of low carbon source in fed water, the supplementary carbon source can be effectively and fully utilized by high-concentration phosphorus removal bacteria in the two-phase anaerobic phosphorus removal tank, and the total phosphorus removal capacity of the system is improved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system including the same. Background technique [0002] Commonly used urban sewage treatment processes include Anaerobic-Anoxic-Oxic (A / A / O) treatment process and its deformation modification process, which have shown good phosphorus removal performance in actual projects. The technical key of the A / A / O treatment process is that there must be enough organic carbon sources in the sewage under anaerobic conditions to ensure that the phosphorus accumulating bacteria can achieve a good phosphorus release effect and reserve a sufficient amount of polyhydroxyalkanoate ( polyhydroxyalkanoates, PHA) and poly-β-hydroxybutyrate (poly-β-hydroxybutyrate, PHB) for subsequent excess phosphorus uptake. However, the ratio of carbon to phosphorus in the influent of many existing sewage plants is far from suff...

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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a low-carbon sewage enhanced phosphorus removal device and a sewage treatment system including it, to solve the problem of large carbon source dosage and high cost in the existing sewage phosphorus removal, and to enhance the phosphorus removal effect. Not good, the problem of low efficiency

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