A ubf reactor utilizing anammox-sulfur autotrophic denitrification coupling denitrification and its system and denitrification method

Abstract

The invention discloses a UBF reactor used for coupled denitriding via anaerobic ammonia oxidation-sulfur-based autotrophic denitrification, and a system and a denitriding method thereof, and belongs to the technical field of waste water processing. The denitriding method is suitable to be used for processing high mmonia nitrogen low C / N waste water, partial nitrification is used for providing all reaction substrates of anaerobic ammonia oxidation, marcasite is used for providing electron donors of sulfur-based autotrophic denitrification; porous limestone is taken as a supporting framework of a limestone filling layer; and nitrite nitrogen generated via nitrosation, and nitrate nitrogen generated via nitrification and anaerobic ammonia oxidation are taken as electron acceptors. The denitriding method is high in ammonium-nitrogen removal rate; operation stability is high; compared with conventional nitration-denitrification denitriding method, the denitriding method possesses following advantages: no extra organic matter is added as the electron donor, marcasite is ued for providing the electron donors of sulfur-based autotrophic denitrification bacteria, cost is low, controllability is high, effluent is stable, sludge yield is low, and energy consumption is low.

Description

technical field [0001] The invention relates to wastewater treatment technology, in particular to a UBF reactor utilizing anammox-sulfur autotrophic denitrification coupling denitrification and its system and denitrification method. The invention is suitable for denitrification of wastewater with high ammonia nitrogen and low C / N Nitrogen treatment, such as biochemical tail water and sludge digestion liquid of aerobic or anaerobic non-denitrification process. Background technique [0002] With the continuous development of industrialization and urbanization in our country, a large amount of waste water containing high concentration of nitrogen is discharged into rivers and lakes, resulting in eutrophication of water bodies, leading to a large number of algae reproduction, which not only has a great impact on the survival of fish and other aquatic organisms Moreover, harmful substances such as algae toxins and nitrite in drinking water exceed the standard, causing harm to hum...

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Problems solved by technology

[0008] The Chinese patent invention name "A whole-process denitrification process coupled with anaerobic ammonium oxidation and denitrification" (patent publication number: CN 105110472 A) completely converts part of the influent ammonia nitrogen into nitrate nitrogen, and denitrifies it through short-range denitrification. Nitrate nitrogen is reduced to nitrite nitrogen, and finally the anaerobic ammonium oxidation process is carried out to overcome the problem that nitrite is difficult to accumulate efficiently, but this process needs to completely convert 52.3% to 56.9% of ammonia nitrogen into nitrate nitrogen, and aeration The amount is large, the energy consumption is high, and the short-range denitrification process still needs to consume organic carbon sources, which increases the operating cost

[0009] Chinese patent invention title "Wastewater Treatment Process of Anaerobic Ammonium Oxidation-Sulfur Autotrophic Denitrification Coupled Denitrification and Desulfurization" (Patent Publication No.: CN 104843863 A) achieves simultaneous denitrification through the coupling of two autotrophic denitrification processes The purpose of sulfur removal, but the process has high requirements on the ratio of ammonia nitrogen, nitrite and sulfide in the influent, and the actual wastewater is difficult to meet the requirements

But the single denitrification process can only remove NO 3 -N, cannot remove NH 4 -N, in general, it is difficult to meet the denitrification requirements of actual wastewater

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