Two-stage integrated biological nitrogen and phosphorus removal reactor

Abstract

The invention discloses a two-stage integrated biological nitrogen and phosphorus removal reactor. The reactor comprises a reactor main body. The inner chamber of the reactor main body is divided into a primary reaction zone and a secondary reaction zone through a secondary reactor in the inner chamber. The primary reaction zone is orderly divided into an anaerobic sludge discharge unit, an anaerobic reaction unit and an overflow unit from bottom to top along the axial direction of the reactor main body. The secondary reaction zone is orderly divided into an anoxic denitrification unit, a three-phase separation unit and an aerobic biofilm reaction unit from bottom to top along the axial direction of the reactor main body. A return device is arranged outside the reactor main body. The aerobic biofilm reaction unit is communicated with an anoxic reaction digestion unit through the return device. The two-stage integrated biological nitrogen and phosphorus removal reactor creates aerobic, anoxic and anaerobic alternating environments, keeps a high COD removal rate and realizes simultaneous removal of nitrogen and phosphorus. The integrated reactor saves a floor space. Residual sludge and phosphorus-rich sludge in the aerobic reaction zone can be smoothly discharged. The acid production reaction in the anaerobic reaction unit can provide acidity for the anoxic reaction unit.

Description

technical field [0001] The invention relates to a two-stage integrated biological nitrogen and phosphorus removal reactor, which belongs to the technical field of sewage treatment. Background technique [0002] In recent years, the problem of water pollution has become increasingly prominent, especially nitrogen and phosphorus pollution, which can easily induce eutrophication of water bodies and endanger aquatic ecosystems. At present, the discharge standards of nitrogen and phosphorus in sewage treatment are also becoming stricter, so the demand for simple, practical and efficient nitrogen and phosphorus removal reactors is becoming stronger and stronger. [0003] Nitrogen and phosphorus removal process is a traditional sewage biological treatment technology, which is a combined process using anaerobic-anoxic-aerobic. In the aerobic stage, aerobic activated sludge in water is used to degrade part of COD that is easy to degrade, and at the same time, ammonia nitrogen and ni...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the traditional denitrification and phosphorus removal aerobic zone, anoxic zone and anaerobic zone are separated independently, resulting in huge investment in infrastructure costs, the present invention provides a nitrogen and phosphorus removal aerobic zone, anoxic zone and anaerobic zone Two-stage integrated biological denitrification and phosphorus removal reactor with integrated zone, high treatment efficiency and low cost

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