Device and method for realizing short-cut nitrification-anaerobic ammonia oxidation based on lateral inhibition of hydroxylamine

Abstract

The invention discloses a device and method for realizing short-cut nitrification-anaerobic ammonia oxidation based on lateral inhibition of hydroxylamine and belongs to the field of urban sewage treatment. Short-cut nitrification is realized in a treatment way that nitrite-oxidizing bacteria (NOB) is inhibited by using hydroxylamine, so that stable nitrite is provided for subsequent anaerobic ammonia oxidation. Hydroxylamine serving as a key intermediate product of a nitrification reaction plays a connecting role for the balance of the whole nitrification process, so that the aims of increasing the cell yield of ammonia oxidizing bacteria (AOB) and inhibiting the activity of NOB can be achieved by appropriately adding hydroxylamine, and furthermore, stable short-cut nitrification is realized. However, hydroxylamine has toxicity, and therefore, AOB and NOB can simultaneously lose activity if hydroxylamine is excessively added. Therefore, the excess problem can be controlled by lateralsludge treatment of hydroxylamine in the patent, meanwhile, short-cut nitrification can be relatively rapidly started, and relatively high nitrite accumulation can be maintained. The method is simplein operation and solves the problem that nitrite is difficult to stably maintain if urban sewage is treated by using a short-cut nitrification-anaerobic ammonia oxidation process.

Description

technical field [0001] The device and method for realizing short-range nitrification-anammox oxidation related to the side-side inhibition of adding hydroxylamine in the present invention are 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 energ...

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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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