Two-stage constructed rapid infiltration system based on anaerobic ammonia oxidation and starting method thereof

Abstract

The invention relates to the field of sewage treatment, and particularly relates to a two-stage constructed rapid infiltration system based on anaerobic ammonia oxidation and a starting method thereof. A water outlet pipe of a water distribution basin and a U-shaped groove are connected with an anoxic-stage sand filtering layer through pipelines respectively; an on-line dissolved oxygen meter is mounted on the anoxic-stage sand filtering layer; the bottom of the anoxic-stage sand filtering layer is provided with a gravel layer; the gravel layer is provided with an anoxic-stage water outlet pipe; a water-resisting bottom plate is arranged below the gravel layer; an anaerobic-stage sand filtering layer is arranged below the water-resisting bottom plate; a cavity is reserved between the anaerobic-stage sand filtering layer and the water-resisting bottom plate; the cavity is provided with an exhaust hole; the cavity is also provided with an anaerobic-stage water inlet; the anaerobic-stage water inlet is connected with an anoxic-stage water outlet pipeline; the bottom of the anaerobic-stage sand filtering layer is provided with a lower gravel layer; the lower gravel layer is connected with an anaerobic-stage high water discharge hole; a base is arranged below the lower gravel layer. By using the rapid infiltration system, the subsequent oxidization of nitrite nitrogen to nitrate nitrogen is omitted; an aeration rate is saved; the energy consumption is decreased; organic matters in sewage can be furthest recycled for producing methane; a reaction volume is also reduced.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an anammox-based two-stage artificial rapid infiltration system and a starting method thereof. Background technique [0002] Sewage treatment technology for domestic sewage and polluted surface water in small towns—Constructed Rapid Infiltration system (CRI system for short) is a new type of rapid infiltration system (RI) established by Professor Zhong Zuoshen from China University of Geosciences. Wastewater ecological treatment methods. It consists of grid pool, pre-sedimentation tank, quick seepage tank and water outlet system. The quick infiltration tank is filled with a certain height of artificial filter material, and the sewage treatment is carried out in the alternating dry and wet operation mode. The hydraulic load cycle is relatively short, that is, frequent flooding and frequent drying, and the hydraulic load is . The unique environment of alternating dry and wet in th...

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Problems solved by technology

[0005] Aiming at the problem of high removal rate of ammonia nitrogen and low removal rate of total nitrogen in the traditional CRI system, the present invention provides a two-stage artificial rapid infiltration system based on anaerobic ammonium oxidation, combined with short-cut nitrification and anammox purpose of nitrogen

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