Method of implementing short course nitration in aeration biological filter chamber using inhibitor

Abstract

The present invention is short range nitrifying method realized with inhibitor in aerating biofilter and belongs to the field of sewage treating technology in environment protecting engineering. By using NaClO3 as inhibitor, partial nitrosomonas is preserved while inhibiting nitromonas so as to form short range nitrifying; active sludge is then inoculated into the aerating biofilter and aerated for 3-5 days and water with ammonia nitrogen controlled in 30-80 mg / L is fed and stayed for 1.5-2.5 hr in the air / water volume ratio of 4 to 1 for whole range nitrification; and NaClO3 is added into water to reach 10-20 mmol / L and run for 7-14 days or more time to form short range nitrifying. The present invention realizes short range nitrifying chemically rather by means of strict environment conditions, and has aerating biofilter as reaction carrier and raised short range nitrifying reaction rate.

Description

technical field [0001] The invention relates to a kind of industrial ammonia-nitrogen wastewater treatment mainly used for low carbon-to-nitrogen ratio, in particular to a method for realizing short-range nitrification in an aerated biological filter tank by using an inhibitor. It belongs to the field of environmental engineering sewage treatment. Background technique [0002] Compared with full nitrification, short-cut nitrification reduces one link in the nitrification stage, and controlling the oxidation of ammonia nitrogen to nitrite stage can increase the concentration of microorganisms and the speed of nitrification reaction, theoretically save oxygen consumption and save 40% in the denitrification stage carbon source while reducing sludge production. However, at present, the main short-range nitrification reactors are completely mixed reactors, such as ordinary activated sludge method, SBR method, etc. Most of the methods used are to control the concentration of diss...

AI Technical Summary

Problems solved by technology

However, at present, the main short-range nitrification reactors are completely mixed reactors, such as ordinary activated sludge method, SBR method, etc. Most of the methods used are to control the concentration of dissolved oxygen and free ammonia to achieve short-range nitrification. The disadvantages are The residence time is generally relatively long, the reaction rate is not high, and the effect on low-concentration ammonia nitrogen wastewater is not good, which affects the development and application of short-range nitrification, a denitrification process.