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Method for quickly remitting inhibition of nitrite in anaerobic ammonium oxidation

An anaerobic ammonia oxidation and nitrous nitrogen technology, applied in the direction of anaerobic digestion treatment, to avoid secondary pollution, avoid large fluctuations, and reduce infrastructure costs

Active Publication Date: 2014-04-09
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nitrite inhibition phenomenon of the anaerobic ammonium oxidation process is one of the important obstacles restricting the industrial application of the process

Method used

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  • Method for quickly remitting inhibition of nitrite in anaerobic ammonium oxidation
  • Method for quickly remitting inhibition of nitrite in anaerobic ammonium oxidation
  • Method for quickly remitting inhibition of nitrite in anaerobic ammonium oxidation

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Embodiment 1

[0029] Upflow Anammox Reactor (effective volume 0.1m 3 ) works well, and the reactor structure is as follows figure 1 As shown, the anammox reactor system includes a reactor body 3, an inlet tank 1, an outlet tank 4, an inlet peristaltic pump 2, a return peristaltic pump 7 and a water-sealed bottle 5, and the bottom of the reactor body 3 is provided with There is a water inlet 8, a water outlet 9 at the upper end, and an air outlet 10 at the top; the water inlet tank 1 is connected to the water inlet peristaltic pump 2, and the water inlet peristaltic pump 2 is connected to the water inlet through the three-phase valve A11, three-phase The other inlet of valve A is connected with the return peristaltic pump, and the water outlet is connected with the return peristaltic pump 7 and the water outlet tank 4 respectively through the three-phase valve B12, and the air outlet is connected with the water-sealed bottle 5, and the water-sealed bottle 5 Vent 6 is arranged on the top.

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Abstract

The invention discloses a method for quickly remitting inhibition of nitrite in anaerobic ammonium oxidation. The method provided by the invention comprises the steps of: when a concentration of nitrite nitrogen is more than 100mg / L in a reactor body, stopping water entering the anaerobic ammonium oxidation reactor, starting a reflux peristaltic pump, adding a sulfamic acid solution and a sodium hydroxide solution in a water outlet of the anaerobic ammonium oxidation reactor in sequence, performing a reflux reaction for 2-3min, repeatedly adding the sulfamic acid solution and the sodium hydroxide solution alternately in the water outlet of the anaerobic ammonium oxidation reactor in sequence and performing the reflux reaction for 2-3min each time, keeping the circulation until the added sulfamic acid and the sodium hydroxide reach a required input quantity under a condition that the concentration of the nitrite nitrogen is less than 20mg / L and a pH value is at a range of 7.8-8.3 in the anaerobic ammonium oxidation reactor, then stopping the reflex reaction, and starting a water entering peristaltic pump. The method disclosed by the invention can remit the inhibition of the nitrite in the anaerobic ammonium oxidation in a short time, so as to save resources and ensure the high activity of anaerobic ammonium oxidizing bacteria; and the method is simple and convenient to implement and reduces the cost of infrastructure.

Description

(1) Technical field [0001] The invention relates to a method for rapidly alleviating the inhibition of nitrite in anaerobic ammonia oxidation. (2) Background technology [0002] Anaerobic ammonium oxidation is a new biological denitrification process, which can reduce nitrous nitrogen to nitrogen gas under anaerobic conditions with ammonia as the electron donor. Compared with the traditional biological denitrification process, anaerobic ammonium oxidation has the advantages of good denitrification effect, no need for oxygen and external organic carbon source, less residual sludge output, low operating cost, etc., and has a good industrial application prospect. However, the growth conditions of anammox bacteria are harsh, they are extremely sensitive to environmental conditions, and they are easily inhibited by high-concentration nitrous nitrogen substrates. And after being inhibited by nitrite, the recovery of the process is more difficult. [0003] Although nitrous nitrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
Inventor 金仁村邢保山阳广凤
Owner HANGZHOU NORMAL UNIVERSITY
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