A device and method for realizing short-range nitrification-ANAMMOX based on hydroxylamine side inhibition

Abstract

A device and method for realizing short-range nitrification-ANAMMOX based on hydroxylamine side inhibition, which belongs to the field of urban sewage treatment, realizes short-range nitrification by using hydroxylamine to inhibit nitrite oxidizing bacteria (NOB), thereby providing for subsequent anaerobic Ammonia oxidation provides stable nitrite. Hydroxylamine, as the key intermediate product of nitrification reaction, plays an important role in the balance of the whole nitrification process. Appropriate dosage can increase the cell productivity of ammonia oxidizing bacteria (AOB) and inhibit the activity of NOB, so as to achieve a stable short-term nitrification. However, hydroxylamine is also toxic, and excessive dosage will cause the inactivation of AOB and NOB at the same time. Therefore, this patent treats sludge by the side of hydroxylamine, which can control the problem of excess. At the same time, it can start short-range nitrification quickly and maintain a high accumulation of nitrous. The method is simple to operate, and solves the problem that it is difficult to maintain stable nitrite in urban sewage by the short-range nitrification-ANAMMOX process.

Description

technical field [0001] The device and method for short-range nitrification-ANAMMOX related to the present invention is applicable to the denitrification treatment of urban sewage with low carbon ratio in the field of urban sewage biological treatment. Background technique [0002] Nowadays, the continuous development of industrialization and the continuous growth of population lead to the excessive growth of plants and algae in the water body, and the serious eutrophication of the water body accelerates the aging of rivers and lakes. Its essence is caused by the discharge of nutrients such as nitrogen and phosphorus into the water body, so the removal of pollutants represented by N and P is an urgent problem to be solved. With the continuous improvement of sewage treatment technology, urban sewage treatment plants are following the path of energy consumption-efficiency-production, with the goal of energy saving, consumption reduction and emission reduction utilization, from ...

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Problems solved by technology

[0004] At present, the methods used to achieve short-cut nitrification mainly include high-concentration free ammonia (FA) and high-concentration free nitrite (FNA), low dissolved oxygen (DO), short sludge time (SRT) combined with aeration time control, lack of Aerobic intermittent aeration means and dosing inhibitors, etc., through strengthening AOB and elutriating to suppress NOB in order to achieve stable nitrous accumulation. However, although the above methods can achieve short-term nitrification, these methods have certain limitations: (1) For urban sewage with a large amount of water, the short-range comparative energy consumption is achieved through high temperature; (2) If the low DO is controlled, the nitrification rate will be reduced, and the activated sludge is prone to sludge bulking; (3) For the influence of pH, in the nitrification process In the process, the pH is constantly decreasing, and the system must maintain a higher pH by continuously adding alkali

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