Intermittent aeration aerobic/anoxic (O/A) type artificial rapid infiltration device

Abstract

The invention belongs to the field of sewage treatment of an artificial rapid infiltration system, and particularly relates to an intermittent aeration aerobic/anoxic (O/A) type artificial rapid infiltration device which comprises an aerobic zone and an anoxic zone which are adjacently arranged left and right and are isolated from each other, and the aerobic zone comprises a water inlet mixing zone and an aerobic reaction zone from bottom to top; according to the aerobic reaction zone, under intermittent aeration operation, organic matter is converted and degraded under the action of aerobic heterotrophic microorganisms, and under the action of ammoniation and nitrification, a large number of nitrogen elements are converted into nitrate radicals. The anoxic reaction zone is used for denitrification reaction denitrification. By improving the type and grading of the traditional artificial rapid infiltration filler, the structure of the device and the like, the aerobic section and the anoxic section are separated, and intermittent micro-aeration is carried out in the aerobic section so that integrated treatment of organic matter removal, denitrification and dephosphorization is realized, and an energy-saving and efficient treatment device is provided for distributed sewage treatment.

Description

technical field [0001] The invention belongs to the field of sewage treatment of an artificial rapid infiltration system, and more specifically relates to an intermittent aeration aerobic / anoxic (O / A) artificial rapid infiltration device. Background technique [0002] The artificial rapid percolation treatment device has the advantages of small capital investment, good pollutant removal effect, flexible layout, convenient operation, maintenance and management, and is especially suitable for decentralized domestic sewage treatment. However, studies have shown that its removal rates for ammonia nitrogen, total nitrogen, and total phosphorus are low. Since the influent water carries very little oxygen, it cannot fully meet the needs of organic matter and ammonia nitrogen degradation, while traditional artificial rapid infiltration systems often use fillers with better permeability, without planting any plants, and the possibility of plant reoxygenation is low. The effect of at...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the invention provides a kind of intermittent aeration aerobic / anoxic (O / A) type artificial rapid percolation device, in which the aerobic zone and the anoxic zone are left and right Adjacent and isolated from each other, the direction of water flow in the aerobic zone is from bottom to top. The sewage enters from the water inlet mixing zone at the bottom of the aerobic zone, and flows into the anoxic zone from the top water distribution pipe to continue the reaction. The aerobic zone can be slightly exposed intermittently. When the sewage flows from the water distribution pipe to the anoxic section, the concentration of dissolved oxygen in the sewage is low. Due to the unique structure of the anoxic section isolated from the atmosphere, the entire system presents "aerobic-anoxic" along the water flow. This solves the technical problems of aerobic zone aeration affecting denitrification and difficulty in deep nitrogen and phosphorus removal existing in the aerobic / anoxic (O / A) type artificial rapid infiltration device of the prior art

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