Method for rapidly recovering activity of anaerobic ammonium oxidation bacteria inhibited by dissolved oxygen
An anaerobic ammonium oxidizing bacteria, anaerobic ammonium oxidation technology, applied in anaerobic digestion treatment, chemical instruments and methods, aerobic and anaerobic process treatment, etc., can solve the problem of long time, poor recovery, long activity lag period and other problems, to achieve the effect of improving denitrification efficiency, good cost-benefit ratio, and reducing activity lag period
Active Publication Date: 2018-05-22
TONGJI UNIV
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Problems solved by technology
This method can overcome the long time required for the natural recovery of anammox bacteria after being inhibited by dissolved oxygen, and the recovery degree is poor. In the integrated "short-cut nitrification-anammox" process, there may be a long activity lag period.
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Embodiment 1-8
[0026] First take 500ml of anaerobic ammonium oxidation sludge, and set the dissolved oxygen concentration in the first stage, the dissolved oxygen concentration in the second stage and the dosage of zero-valent nano-iron in the third stage as shown in Table 1.
[0027] Wherein, the dosage of zero-valent nano-iron in the third stage of embodiment 1 and 5 is 0, in embodiment 2,3,4 and 6,7,8, the dosage of zero-valent nano-iron is respectively 5 (mg / L), 25(mg / L), 75(mg / L).
[0028] The dissolved oxygen concentration in the second stage in Examples 1 to 4 is 0.2 (mg / L), and the dissolved oxygen concentration in the second stage in Examples 5 to 8 is 2.0 (mg / L).
[0029] Other process conditions are the same.
[0030] Table 1, the dosage and dissolved oxygen concentration of zero-valent nano-iron in Examples 1-8.
[0031]
[0032] The anammox sludge was obtained from the existing anammox sludge in our research group. Measure the volatile suspended solids concentration of thi...
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The invention relates to a method for rapidly recovering the activity of anaerobic ammonium oxidation bacteria inhibited by dissolved oxygen, and belongs to the technical field of sewage treatment. The method comprises the following steps: firstly anaerobic ammonium oxidation sludge with the activity decreased after being inhibited by the dissolved oxygen is taken, the taken sludge is placed intoa reactor, the pH is adjusted to 7.2-7.3, the temperature is adjusted to 35+ / -1 DEG C, and detection is performed by using a dissolved oxygen meter to determine the concentration of the dissolved oxygen in the anaerobic ammonium oxidation sludge; and the reactor is sealed to prevent air from continuously entering the reactor, based on the concentration of the dissolved oxygen in the above step, 5-75 (mg / L) zero-valent nano iron is added into the reactor, monitoring is performed through the dissolved oxygen meter, and when the dissolved oxygen in the anaerobic ammonium oxidation sludge is completely removed, recovery of the activity of the anaerobic ammonium oxidation bacteria is completed. Compared with the activity of anaerobic ammonium oxidation bacteria recovered through nitrogen aeration, the activity of the anaerobic ammonium oxidation bacteria provided by the invention can be improved by about 33% by addition of a small amount of the zero-valent nano iron, the denitrification efficiency is improved, and the method has a better cost-benefit ratio. The method provided by the invention is suitable for rapid recovery of the anaerobic ammonium oxidation bacteria inhibited by the dissolved oxygen with a higher concentration.
Description
technical field [0001] The invention relates to a method for rapidly recovering the activity of anaerobic ammonia oxidizing bacteria inhibited by dissolved oxygen. The invention belongs to the technical field of quickly restoring the activity of anammox bacteria in sewage treatment. Background technique [0002] Anaerobic ammonium oxidation (Anammox) bacteria can use ammonia nitrogen as an electron donor and nitrite as an electron acceptor in the absence of dissolved oxygen to convert it into nitrogen at a ratio of 1:1.2. The reaction formula is : NH 4 + +1.32NO 2 – →N 2 +0.26NO 3 - +2H 2 O. Based on this biochemical characteristic, the researchers proposed to apply anammox bacteria to the field of sewage treatment. Since the anaerobic ammonium oxidation reaction does not require the participation of molecular oxygen, there is no need for aeration, which can save energy for feeding. At the same time, since the anammox bacteria are chemoautotrophs, this technology ...
Claims
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Login to View More IPC IPC(8): C02F3/30C02F3/28
CPCC02F3/28C02F3/307
Inventor 王亚宜闫媛马骁王伟刚
Owner TONGJI UNIV