Enhanced denitrification method and device

Abstract

The invention discloses an enhanced denitrification method and device, and belongs to the technical field of wastewater treatment. The enhanced denitrification device comprises an anoxic tank, an aerobic tank and a carbon source multiplier which are connected in sequence, and the output end of the carbon source multiplier is connected with the anoxic tank; a plurality of membrane contactors are fixed in the carbon source multiplier, the membrane contactors are of hollow structures, and gaps exist between the membrane contactors and a shell of the carbon source multiplier; when the device disclosed by the invention is used for denitrification, a macromolecular carbon source can be added in the denitrification process, the macromolecular carbon source is hydrolyzed into volatile fatty acid by utilizing hydrolysis zymophyte existing in a gap between the carbon source multiplier and the membrane contactor, and then the volatile fatty acid is diffused and permeated into a hollow structure of the membrane contactor through the membrane; as a small molecular carbon source which can be efficiently utilized by denitrifying bacteria, the denitrification process is promoted.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method and a device for strengthening denitrification. Background technique [0002] In recent years, the restrictions on sewage standards have become increasingly strict, especially for total nitrogen discharge requirements; in the past two decades, many new biological denitrification technologies have been developed at home and abroad, such as simultaneous nitrification and denitrification, short-range nitrification and denitrification, anaerobic ammonia However, the traditional nitrification and denitrification process is still the most widely used process, which includes two steps of nitrification and denitrification. The removal efficiency of nitrogen in sewage depends to a large extent on the ratio of carbon to nitrogen in sewage, and the ratio of low carbon to nitrogen is a typical feature of municipal sewage in my country. Even lower than 100mg / ...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a solution that can solve the problem of low carbon-nitrogen ratio of influent, insufficient utilization of additional carbon source, and low cost. High problem, and can effectively combine carbon source hydrolysis fermentation and denitrification process to strengthen the denitrification method and its device

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