Device and method for deep denitrification and enrichment of glycogen accumulating organisms

Abstract

The invention provides a device and method for deep denitrification and enrichment of glycogen accumulating organisms and belongs to the technical field of environmental protection. Artificially distributed water enrichment culture is performed according to the required environmental requirements for growth of the glycogen accumulating organisms. Artificially distributed water 1 is pumped into a glycogen accumulating organism enrichment SBR reactor, anaerobic mixing is performed, glycogen decomposition is performed under the anaerobic condition, and energy and reducing power NADH2 are provided for PHAs synthesis; a carbon source is absorbed, synthesized PHAs is stored in cells but does not release phosphorus; after an anaerobic phase finishes, precipitation and drainage are performed, and then artificially distributed water 2 containing no phosphorus nor carbon source is added to execute an aerobic aeration phase; under the aerobic condition, PHA in oxidized cells of the glycogen accumulating organisms is used for glycogen regeneration and microbial proliferation and growth; after the aerobic phase finishes, precipitation and drainage are performed; when the glycogen accumulating organism enrichment SBR reactor operates, sludge discharge is needed to keep the sludge concentration in the range of 2500-4000 mg/L. The method can achieve quick and efficient enrichment culture of the glycogen accumulating organisms.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for enriching polysaccharide bacteria by adjusting the operation mode of the enrichment device and controlling the reaction conditions by using excess sludge from an urban domestic sewage treatment plant. Background technique [0002] Water eutrophication has become one of the important environmental problems faced by my country's sustainable development. Excessive nitrogen and phosphorus are the main factors causing water eutrophication. At present, the more economical and effective phosphorus removal method is the enhanced biological phosphorus removal (EBPR) method based on the excess phosphorus uptake by phosphorus accumulating organisms (PAOs). Enhanced biological phosphorus removal refers to the purpose of reducing the concentration of phosphorus in sewage by enriching phosphorus accumulating bacteria in the sewage treatment system and ...

AI Technical Summary

Problems solved by technology

In the EBPR system, in addition to phosphorus accumulating bacteria, there is another type of microorganisms—glycogen accumulating organisms (GAOs) that can also absorb carbon sources and synthesize polyhydroxyalkanoates (PHAs) in an anaerobic environment. ) is stored in the cell, but does not release phosphorus, decomposes PHAs to synthesize glycogen under aerobic conditions without accumulating phosphorus, and does not contribute to phosphorus removal

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