Method and device for enhanced biological denitrogenation of municipal sewage

Abstract

The invention discloses a method and device for enhanced biological denitrogenation of municipal sewage. The method is characterized in that enhanced absorption and enrichment are carried out on organic matters in water by utilizing active sewage as an absorber; and desorption and directional high-quality transformation are carried out on a carbon source by a hot alkali hydrolysis method so that the obtained carbon source is finally used as an extra carbon source for biological denitrification, thus efficient post-denitrification biological denitrogenation is achieved under the condition thatthe extra carbon source is not added, and effluent meets the high-standard total nitrogen emission requirement. The experiment result indicates that by implementing the process, the utilization efficiency of a sewage carbon source can be improved, the concentration of the total nitrogen in the effluent can be reduced, the residual sewage amount can be lowered, the nitration effect is improved, thereby meeting the requirement on the upgrading modification of a current municipal sewage treatment plant, providing a novel process for efficient denitrogenation of sewage and reduction of sludge andproviding a novel development direction for process modification.

Description

technical field [0001] The invention relates to a method and a device for strengthening biological denitrification of urban sewage. Background technique [0002] The problems of water environment pollution and water eutrophication in my country are becoming more and more serious. Nitrogen is one of the main factors causing water eutrophication. Especially with the progress of society, the continuous improvement of people's living standards, and the development of industry and agriculture, the quality of influent water in urban sewage plants has undergone great changes: the content of nitrogen and phosphorus has doubled, and the content of organic matter has decreased. Therefore, insufficient denitrification carbon source, unstable nitrification effect in winter, and difficulty in meeting higher sewage discharge standards are common problems in urban sewage treatment plants; It is one of the main reasons that the cost of sewage treatment is greatly increased. Therefore, how...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the prominent problems of low COD concentration in influent water of sewage treatment plants, insufficient denitrification carbon source, unstable ammonia nitrogen removal effect, difficult discharge of TN, large amount of residual sludge and difficult treatment and disposal, etc., to provide a solution A method and device for biological denitrification of sewage

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