A SPNA-integrated denitrification method for treating low-matrix wastewater under continuous flow conditions

Abstract

The invention belongs to the technical field of sewage treatment, and relates to a SPNA integrated denitrification method for treating low-matrix wastewater under continuous flow conditions. The aeration device is first opened for 5-30 minutes to carry out the whole process of nitrification, both AOB and NOB are active, and then closed. After aeration for 5‑30 minutes, aeration is performed again, and intermittent aeration is repeated in this way; by embedding and immobilization, nitrifying bacteria or nitrifying sludge, and anammox bacteria or anammox sludge are used as embedding agents Made into embedded bacteria granules, an upflow reactor is used, water is fed into the bottom, and water is discharged from the upper part. The nitrification embedded bacteria granules are placed at the bottom of the reactor, and the anaerobic ammonium oxidizing bacteria granules are placed on the upper part. The nitrification embedded bacteria granules and anaerobic Ammonia oxidizing bacteria embedded particles are stratified by conventional grids or plastic macroporous balls and then continue to denitrify, realizing the SPNA integrated denitrification treatment of low-matrix wastewater under continuous flow conditions, effectively preventing the loss of bacteria and increasing the reaction rate. The biomass in the device ensures the rapid start-up and stable operation of the SPNA process.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment, and relates to a SPNA integrated denitrification method for treating low-matrix wastewater under continuous flow conditions. Background technique: [0002] With the acceleration of industrialization and modernization, the problems of water pollution and eutrophication have become increasingly prominent. Sewage treatment technology has entered the stage of removing organic pollutants and synchronous deep denitrification from the stage of single removal of organic pollutants in the past. stage. The biological denitrification process for the purpose of controlling eutrophication of water body has become a research hotspot in the field of sewage treatment. According to statistics, as of 2011, my country's urban sewage treatment plants reached 3135, of which more than 90% of urban sewage treatment plants use A / O, A 2 O, oxidation ditch, SBR, the urban sewage treatment rate reaches 85%, but...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcoming that existing technology exists, solve the deficiency of existing SPNA process, design and provide a kind of novel processing technology that intermittent aeration, embedding immobilization technology and SPNA process are applied in combination, so that it can be used in Stable treatment of low-matrix domestic sewage under continuous flow conditions

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