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Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge

A technology of activated sludge and sludge method, applied in chemical instruments and methods, water/sludge/sewage treatment, sustainable biological treatment, etc. and other problems, to achieve good application prospects and improve the effect of nitrification activity

Inactive Publication Date: 2011-06-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

AOB bacteria feed themselves by decomposing amines (ammonia salts), and grow and reproduce the fastest when the temperature reaches about 25 degrees. Therefore, in northern China, a major problem faced by sewage treatment plants is that in winter when the temperature is low, The denitrification effect of the biological method will be significantly affected
Beijing Gaobeidian Sewage Treatment Plant is the largest sewage treatment plant in my country, and it is also a typical sewage treatment plant in northern China. It uses activated sludge to treat sewage. According to the operating data of Gaobei Sewage Treatment Plant over the years, the plant has The effect of nitrogen is unstable, especially in winter, the treatment effect is poor, and the effluent is difficult to meet the standard

Method used

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  • Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge
  • Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge
  • Method for promoting growth and nitrification activity of amine salt oxidizing bacteria in activated sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1, the preparation of ozone lysed sludge

[0052] 1. Domestication of sludge

[0053] Activated sludge is taken from Beijing Qinghe Urban Sewage Treatment Plant (urban sewage treatment plant), the concentration of total suspended solids is about 2000mg MLSS / L, and it is domesticated with artificial wastewater for 30 days.

[0054] The composition of artificial wastewater is: glucose 750mg / L (COD concentration is about 800mg / L), (NH 4 ) 2 SO 4 202.5mg / L (TN concentration is about 40mg / L), KH 2 PO 4 25.2mg / L (TP concentration is about 5mg / L), MgSO 4 9.5mg / L, CaCl 2 0.91mg / L, Fe 2 (SO 4 ) 3 0.14mg / L, the rest is tap water.

[0055] 2. Generation of sludge by aerobic activated sludge process

[0056] 1. Put 4.6L domesticated sludge in the aeration tank;

[0057] 2. The aeration tank is connected to the water pump, and the artificial wastewater is pumped continuously. The artificial wastewater enters the aeration tank first, and then enters the sedimen...

Embodiment 2

[0063] Embodiment 2, the preparation of ozone lysed sludge

[0064] 1. Domestication of sludge

[0065] Activated sludge is taken from Beijing Qinghe Urban Sewage Treatment Plant (urban sewage treatment plant), the concentration of total suspended solids is about 2800mg MLSS / L, and it is domesticated with artificial wastewater for 30 days.

[0066] The composition of the artificial wastewater is the same as Step 1 of Example 1.

[0067] 2. Generation of sludge by aerobic activated sludge process

[0068] Same as Step 2 of Example 1.

[0069] The weight of the total suspended solids (MLSS) of the collected sludge was measured, and the concentration of the total suspended solids in the sludge was calculated to be about 2800 mg MLSS / L.

[0070] 3. Preparation of ozone lysed sludge

[0071] The dosage of ozone is 0.05g O 3 / g MLSS, and all the other are with the step three of embodiment 1.

Embodiment 3

[0072] Example 3, the promotion of ozone lysed sludge to the growth of ammonia salt oxidizing bacteria and nitrification activity in activated sludge

[0073] 1. Domestication of sludge

[0074] Activated sludge was taken from Beijing Qinghe Municipal Sewage Treatment Plant and domesticated with artificial wastewater for 30 days.

[0075] The composition of artificial wastewater is: glucose 750mg / L (COD concentration is about 800mg / L), (NH 4 ) 2 SO 4 202.5mg / L (TN concentration is about 40mg / L), KH 2 PO 4 25.2mg / L (TP concentration is about 5mg / L), MgSO 4 9.5mg / L, CaCl 2 0.91mg / L, Fe 2 (SO 4 ) 3 0.14mg / L, the rest is tap water.

[0076] 2. Ozone lysed sludge promotes the growth of ammonia oxidizing bacteria and nitrification activity in activated sludge

[0077] In order to prove the effect of ozone lysed sludge on the growth of ammonia oxidizing bacteria and nitrification activity in activated sludge, two groups of experiments were carried out respectively. In thi...

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Abstract

The invention discloses a method for promoting the growth and the nitrification activity of amine salt oxidizing bacteria in activated sludge, which comprises the step of adding ozone lysis sludge in the activated sludge. The invention can improve the nitrification activity and the survivability to the temperature of the sludge without a fixing carrier, and can solve the problem of residual sludge during the wastewater treatment, thereby having better application prospect in the industry.

Description

technical field [0001] The invention relates to a method for promoting the growth and nitrification activity of ammonia oxidizing bacteria in activated sludge. Background technique [0002] With the rapid development of industrial and agricultural production and the continuous growth of population, the amount of wastewater is increasing, and nitrogen pollution is becoming more and more serious. Therefore, denitrification has become an important task in water pollution control. [0003] Microorganisms in activated sludge system are very important for nitrogen treatment process. Nitrogen removal in biological treatment includes two main steps of nitrification and denitrification, and the nitrification process is the rate-limiting step of the whole system. The nitrification process can be divided into two steps, and each step is controlled by different bacteria: the first step is to oxidize ammonia salt to nitrite (ammonia salt oxidizing bacteria, ammonia oxidizing bacteria, A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/00
CPCY02W10/10
Inventor 邢新会闫桑田张雪王瑞民初里冰
Owner TSINGHUA UNIV
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