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Method for enhancing anaerobic ammonia oxidizing bacteria culture and improving bacteria activity by using ferrous sulfide

A technology of anaerobic ammonia oxidizing bacteria and ferrous sulfide, which is used in anaerobic digestion treatment, adding compounds to stimulate growth, bacteria, etc., to shorten the start-up process, promote metabolism, and improve activity.

Inactive Publication Date: 2021-02-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the perspective of Nitrogen Loading Rates (NLRs), these sewage treatment plants mainly treat wastewater from glutamic acid and amino acid industries and slaughterhouses. Anammox has not yet become a mainstream process for domestic sewage treatment, and there are still many key technologies to be resolved , especially how to shorten the time from anaerobic granular sludge to anaerobic ammonium oxidation granular sludge, so as to deal with the problems of batch production in practical application

Method used

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  • Method for enhancing anaerobic ammonia oxidizing bacteria culture and improving bacteria activity by using ferrous sulfide
  • Method for enhancing anaerobic ammonia oxidizing bacteria culture and improving bacteria activity by using ferrous sulfide
  • Method for enhancing anaerobic ammonia oxidizing bacteria culture and improving bacteria activity by using ferrous sulfide

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Embodiment 1

[0031] A method for utilizing ferrous sulfide to strengthen the cultivation of anammox bacteria and improve the activity of the bacteria, the steps are as follows:

[0032] (1) Ferrous sulfide particles with a particle size of 1 to 5 mm, the scanning electron microscope photo is as follows figure 1 As shown in (a, b), the color is dark brown and the texture is compact; the main components of ferrous sulfide are iron and sulfur, and iron mainly exists in the form of divalent iron.

[0033] Take 2.5-5L of waste water containing ammoniacal nitrogen and nitrite nitrogen to be treated every day, and add it to the R2 reactor. Add 3g / L ferrous sulfide and anaerobic granular sludge into the reactor at 32±1℃, The amount of granular sludge added is 5450-5550mgMLSS / L;

[0034] (2) Nitrogen cylinders are used to aerate for 10 minutes, and the hydraulic retention time (HRT) at 30-34°C is 24-48 hours, and the degradation efficiency of pollutants in wastewater is improved. After detection ...

Embodiment 2

[0041] A method for utilizing ferrous sulfide to strengthen the cultivation of anammox bacteria and improve the activity of the bacteria, the steps are as follows:

[0042] (1) Ferrous sulfide particles with a particle size of 1-5mm, dark brown in color and compact in texture; the main components of ferrous sulfide are iron and sulfur, and iron mainly exists in the form of divalent iron.

[0043] Take 2.5-5L of ammoniacal nitrogen and nitrite nitrogen-containing waste water to be treated every day, and add it to the R2 reactor. Add 1g / L ferrous sulfide and anaerobic granular sludge into the reactor at 32±1°C. The amount of granular sludge added is 5450-5550mgMLSS / L;

[0044] (2) Nitrogen cylinders are used to aerate for 10 minutes, and the hydraulic retention time (HRT) at 30-34°C is 24-48 hours, and the degradation efficiency of pollutants in wastewater is improved.

[0045] Set up the R1 reactor as a control experiment. In the test, R1 was added with the same volume of nit...

Embodiment 3

[0047] A method for utilizing ferrous sulfide to strengthen the cultivation of anammox bacteria and improve the activity of the bacteria, the steps are as follows:

[0048] (1) Ferrous sulfide particles with a particle size of 1-5mm, dark brown in color and compact in texture; the main components of ferrous sulfide are iron and sulfur, and iron mainly exists in the form of divalent iron.

[0049] Take 2.5-5L of ammoniacal nitrogen and nitrite nitrogen-containing waste water to be treated every day, and add it to the R2 reactor. Add 5g / L ferrous sulfide and anaerobic granular sludge into the reactor at 32±1°C, anaerobic The amount of granular sludge added is 5450-5550mgMLSS / L;

[0050] (2) Nitrogen cylinders are used to aerate for 10 minutes, and the hydraulic retention time (HRT) at 30-34°C is 24-48 hours, and the degradation efficiency of pollutants in wastewater is improved.

[0051] Set up the R1 reactor as a control experiment. In the test, R1 was added with the same vol...

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Abstract

The invention relates to a method for enhancing anaerobic ammonia oxidizing bacteria culture and improving bacteria activity by using ferrous sulfide, which comprises the following steps: adding ferrous sulfide particles and anaerobic granular sludge into an up-flow anaerobic sludge bed reactor, wherein the addition amount of the ferrous sulfide particles is 1-10 g / L to-be-treated wastewater containing ammoniacal nitrogen and nitrite nitrogen; and conducting stirring under the anaerobic dark condition of 30-34 DEG C to enable anaerobic ammonia oxidation sludge in the reactor to fully react with pollutants, and adjusting the water inlet flow rate to enable the hydraulic retention time (HRT) to be 24-48 hours. By adding ferrous sulfide, culture of anaerobic ammonia oxidizing bacteria can beaccelerated, the starting time of the reactor is shortened, the activity of the anaerobic ammonia oxidizing bacteria is improved, and obtained particles are more compact and better in stability. The method disclosed by the invention is simple in process and mild in reaction conditions, and can be carried out under normal anaerobic ammonia oxidation reaction conditions; and the method is safe and harmless to the environment and convenient for engineering application.

Description

technical field [0001] The invention relates to a method for using ferrous sulfide to strengthen the cultivation of anammox bacteria and improve the activity of the bacteria, and belongs to the technical field of environmental microorganisms and wastewater treatment. Background technique [0002] As a low-energy, environment-friendly autotrophic nitrogen removal technology, the anaerobic ammonium oxidation process has received extensive attention. This process mainly relies on the anammox bacteria to produce NO 2 - -N is an electron acceptor, the NH 4 + -N converts to N 2 . Compared with the traditional biological denitrification process, the anaerobic ammonia oxidation process does not require organic matter as a carbon source, and at the same time, the oxygen demand is reduced by about 60%, and the remaining sludge output is reduced by about 90%. It occupies a small area and can save operating costs About 60%. In addition, the anaerobic ammonium oxidation process ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C12N1/20C12N1/38
CPCC02F3/28C12N1/20C12N1/38
Inventor 倪寿清郭蓓蓓邹春榛
Owner SHANDONG UNIV
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