SPNA integrated denitrification method for treating low substrate wastewater under continuous flow conditions

Abstract

The invention belongs to the technical field of sewage treatment, and relates to a SPNA integrated nitrogen removal method for treating low substrate wastewater under continuous flow conditions. Firstly, an aeration device is turned on for 5-30 minutes for whole-process nitrification, both AOB and NOB are active, after aeration is turned off for 5-30 minutes, the aeration is conducted again, and the intermittent aeration is repeated. An embedding immobilization means is adopted, nitrifying bacteria or nitrifying sludge and anaerobic ammonium oxidizing bacteria or anaerobic ammonium oxide sludge are made into embedded bacteria granules with an embedding agent, an upflow reactor is adopted, water enters the bottom, the water is discharged from the upper portion, the nitrification embedded bacteria granules are placed at the bottom of the reactor, anaerobic ammonium oxidizing bacteria embedded granules are placed on the upper portion, the nitrification embedded bacteria granules and the anaerobic ammonia oxidizing bacteria embedded particles are layered by a conventional grid or plastic macroporous ball method and continue to be denitrified to achieve the SPNA integrated denitrification treatment of the low-substrate wastewater under the continuous flow conditions, bacteria loss is effectively prevented, the biomass inside the reactor is increased, and fast start-up and stable operation of a SPNA process are ensured.

Description

Technical field: [0001] The invention belongs to the technical field of sewage treatment and relates to an 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 more and more prominent. From the previous stage of single removal of organic pollutants, sewage treatment technology has entered the process of removing organic matter and simultaneously deep denitrification. stage. The biological denitrification process for controlling the eutrophication of water bodies has become a research hotspot in the field of sewage treatment. According to statistics, as of 2011, there were 3135 urban sewage treatment plants in my country, and more than 90% of the urban sewage treatment plants adopted A / O, A 2 O, oxidation ditch, SBR, urban sewage treatment rate reaches 85%, but most sewage...

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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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