Device and method for enhancing utilization of carbon source and deep denitrification in mainstream municipal sewage by fermenting sidestream sludge to produce acid

Abstract

The invention provides a device and a method for enhancing utilization of a carbon source in mainstream municipal sewage and deep denitrification by fermenting sidestream sludge to produce acid, and aims at the deep treatment and resource utilization requirements of sewage / sludge, innovates a deep denitrification process taking short-cut denitrification coupling anaerobic ammonia oxidation as a core on the basis of the prior art, and combines a method for extracting and recycling a carbon source in the sludge, so that a new process route and thought are provided for urban sewage and sludge treatment. By arranging sideflow double-path sludge acidification product utilization, the conversion and utilization efficiency of a carbon source in the sludge is enhanced, and the consumption of an external organic carbon source in a biological denitrification process is reduced. The process can promote efficient bioconversion and denitrification of anaerobic ammonia oxidation and short-cut denitrification in the anaerobic and anoxic reaction zones, and reduce the consumption of dissolved oxygen in the aerobic zone, thereby reducing the energy consumption and carbon emission in the sewage treatment process. Through the composition proportion of inlet water in each reaction zone, deep denitrification is achieved, the quality of outlet water is improved, and energy conservation and consumption reduction are achieved.

Description

technical field [0001] The invention relates to a technology for enhancing the carbon source utilization and deep denitrification in mainstream urban sewage by fermenting side flow sludge to produce acid, and belongs to the field of sewage biological treatment. Background technique [0002] my country's urban sewage treatment plants are faced with the dual problems of meeting discharge standards and saving energy and reducing consumption. In recent years, although organic pollution has been curbed to a certain extent, the problem of water eutrophication caused by excessive discharge of nutrients such as nitrogen and phosphorus has become increasingly serious. Nitrogen and phosphorus removal has become a major demand for water pollution control. However, urban sewage in my country is generally characterized by a low carbon-to-nitrogen ratio. In order to meet increasingly stringent discharge standards, the traditional denitrification process requires a large amount of aeration...

AI Technical Summary

Problems solved by technology

However, the large-scale application of anaerobic ammonium oxidation in urban sewage treatment has not yet been realized.

Functional Bacteria Enrichment Cultivation and Persistence Difficulty, Substrate NO 2 - Difficulty in obtaining stably and the lack of effective control methods for multi-bacteria synergy are the main challenges of research in this direction

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