Device for removing nitrogen through bio-autotrophic denitrification

Abstract

A device for removing nitrogen through bio-autotrophic denitrification belongs to the technical field of water purification and comprises a drug dissolving pool, a dosing pump, a nitrogen polluted water inlet pump, an upflow anaerobic sludge bed and a nitrogen escape outlet, wherein sodium thiosulfate is dissolved in the drug dissolving pool; the bottom of the drug dissolving pool is connected with the inlet pipe of the dosing pump; the outlet pipe of the dosing pump is connected with the inlet pipe of the nitrogen polluted water inlet pump; the outlet pipe of the nitrogen polluted water inlet pump is connected with the water inlet at the bottom of the upflow anaerobic sludge bed; and the nitrogen escape outlet is arranged at the top of the upflow anaerobic sludge bed to discharge gases. Without adding organic matters, the device removes the nitrate nitrogen in the nitrogen polluted water and simultaneously avoids the problem of possible accumulation of intermediate products of nitrites in the nitrate nitrogen reduction process.

Description

technical field [0001] The invention relates to a method in the technical field of water purification, in particular to a bioautotrophic denitrification and denitrification device based on sodium thiosulfate as an electron acceptor. Background technique [0002] Nitrogen compounds in nature are organic nitrogen compounds (proteins, nucleic acids, etc.), ammonia nitrogen (NH 4 + , NH 3 ), nitrate nitrogen (NO 3 - , NO 2 - ) and gaseous nitrogen (N 2 , NO, NO 2 etc.) exist. After a series of natural or artificially enhanced biotransformation processes, nitrogen is mostly present in the form of nitrate nitrogen (mainly nitrate nitrogen) before and after being discharged into natural water bodies. Due to the increasing frequency of human production and living activities, a large amount of nitrogen is discharged into natural water bodies, resulting in eutrophication of water bodies. At present, most of the large and medium-sized lakes and reservoirs in my country are fac...

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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a bioautotrophic denitrification denitrification device, which removes nitrate nitrogen in nitrogen-polluted water without adding organic matter, and at the same time avoids possible occurrence of The problem of nitrite intermediate product accumulation

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