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Method for quickly starting autotrophic ammoxidation by using iron-carbon material

A fast-starting, self-supporting technology, applied in the field of sewage biological denitrification treatment, can solve the problems of difficult start-up, slow microorganisms, and easy loss with water flow, etc., and achieve the effect of reducing loss with water flow

Active Publication Date: 2021-06-08
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the problems that the autotrophic ammonia oxidation reactor is difficult to start / start slowly and the microorganisms are easy to be lost with the water flow during the startup process, and to provide a method for quickly starting the autotrophic ammonia oxidation using iron-carbon materials

Method used

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  • Method for quickly starting autotrophic ammoxidation by using iron-carbon material

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Embodiment 1

[0042] This embodiment provides a method for rapidly starting autotrophic ammonia oxidation using iron-carbon materials, and the autotrophic ammonia oxidation in this embodiment is autotrophic anaerobic ammonium oxidation. Proceed as follows:

[0043]S1. Place the iron-carbon material in the bioreactor (EGSB reactor) to one-half of the height of the bioreactor, and then inoculate the activated sludge in the anoxic zone of the sewage treatment station of the livestock and poultry farm; the concentration of the inoculated activated sludge 1-20g MLSS / L and 1-15g MLVSS / L. When inoculating, first wash the inoculated activated sludge with distilled water for three times, then add the EGSB reactor, add distilled water to 1L, and pass nitrogen into the reactor for 3 to 5 minutes before turning on the peristaltic pump to remove dissolved oxygen in the water. The operating conditions of the EGSB reactor are: the reaction temperature is controlled at 35°C, the influent flow rate is 0.5-...

Embodiment 2

[0050] This embodiment is the second embodiment of the present invention. The difference from Embodiment 1 is that the nutrient element dosage ratio in this embodiment is 0.15%; The salt concentration is controlled at 70mg / L; glucose is used as the carbon source, and the COD of the influent is controlled to be 80mg / L; when the ammonia nitrogen and nitrite removal rate of the influent exceeds 70%, the ammonia nitrogen and nitrite in the influent are increased each time. The concentration of nitrate is 25mg / L each, and the concentration of ammonia nitrogen and nitrite in the influent will eventually increase to 250mg / L.

[0051] The experimental results of this example are basically consistent with those of Example 1, and the rapid start-up of autotrophic ammonia oxidation can be successfully realized.

Embodiment 3

[0053] This embodiment is the third embodiment of the present invention. The difference from Embodiment 1 is that the nutrient element dosage ratio in this embodiment is 0.1%; The salt concentration is controlled at 30mg / L; methanol is used as the carbon source, and the COD of the influent is controlled at 20mg / L; when the removal rate of ammonia nitrogen and nitrite in the influent exceeds 70%, the ammonia nitrogen and nitrite in the influent are increased each time. The concentration of nitrate is 10mg / L each, and the concentration of ammonia nitrogen and nitrite in the influent will eventually increase to 150mg / L.

[0054] The experimental results of this example are basically consistent with those of Example 1, and the rapid start-up of autotrophic ammonia oxidation can be successfully realized.

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Abstract

The invention discloses a method for quickly starting autotrophic ammoxidation by using an iron-carbon material. The method comprises the following steps: S1, placing a microbial biofilm culturing filler iron-carbon material in a bioreactor, and inoculating sludge, wherein the form of an iron element in the iron-carbon material is ferric iron; S2, adding a macroelement nutrient solution and a microelement nutrient solution into inlet water of the bioreactor, and controlling the concentration of ammonia nitrogen and nitrite in the inlet water to be 30-120mg / L; S3, after the bioreactor runs for at least 30 days, adding an organic carbon source into the inlet water to enable mixotrophic microorganisms and autotrophic microorganisms in the bioreactor to grow; S4, when the removal rate of the ammonia nitrogen and the nitrite in the inlet water exceeds 70%, increasing the concentration of the ammonia nitrogen and the nitrite in the inlet water, and starting autotrophic ammoxidation. According to the invention, rapid starting of autotrophic ammoxidation is realized, and the cost required by traditional sewage denitrification nitrogen removal is saved.

Description

technical field [0001] The invention relates to the technical field of sewage biological denitrification treatment, and more specifically relates to a method for rapidly starting autotrophic ammonia oxidation using iron-carbon materials. Background technique [0002] Excessive nitrogen is one of the most important causes of eutrophication in water bodies. Reducing nitrogen discharge to receiving water bodies and improving the conversion efficiency of total nitrogen are still research hotspots in nitrogen pollution control. At present, the sewage treatment plants of various cities and towns in my country and the sewage treatment stations of enterprises and institutions still use the traditional nitrification / denitrification biological denitrification process. Nitrification relies on ammonia oxidizing bacteria (AOB) to oxidize ammonia nitrogen into nitrite, nitrite Oxidizing bacteria (NOB) oxidize nitrite to nitrate. These two processes require the use of blower aerators for lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F101/16
CPCC02F3/28C02F3/34C02F2101/16Y02W10/10
Inventor 胡颖斌李宁郭钦江进许燕滨罗晓楠曹节沈桐
Owner GUANGDONG UNIV OF TECH
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