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A kind of biological treatment method of ammonia-containing wastewater

A technology for biological treatment and sewage treatment plants, applied in the direction of biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve problems such as no effect, achieve enhanced biochemical treatment effect, improve composition, High impact resistance effect

Active Publication Date: 2019-07-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microbial bacterial agents involved in the above inventions are mainly suitable for treating waste water with low COD and good biodegradability, and have no effect on treating ammonia-containing waste water containing refractory organic pollutants.

Method used

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  • A kind of biological treatment method of ammonia-containing wastewater

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Embodiment 1

[0023] The preparation of embodiment 1 microbial bacterial agent

[0024] 1. Bacterial activation: The medium formula used for the bacterial activation and seed liquid cultivation of Cochlear palustris FSDN-A and Staphylococcus koeri FSDN-C is: beef extract: 6g / L, peptone: 8g / L, NaNO 2 : 0.6g / L, methanol: 0.5mL / L; the activation medium formula of Arthrobacter FDN-1 and Flavobacterium waterii FDN-2 is: beef extract: 5g / L, peptone: 10g / L, NaNO 2 : 1g / L, add 2.0% agar; the activation medium formula of denitrification paracoccus DN-3 is: KNO 3 : 1g / L, sodium succinate: 8g / L, KH 2 PO 4 :1g / L, FeCL 2 : 0.5g / L, add 2.0% agar; the activation medium formula of Methylobacterium SDN-3 is: ammonium sulfate: 0.5g / L, methanol: 0.75mL / L, KH 2 PO 4 :1g / L, FeCL 2 :0.5g / L; add 2% agar. After spreading evenly on the plate, place it in a constant temperature incubator at a temperature of 30°C for activation.

[0025] 2. Use the inoculation loop to scrape the bacteria on the plate and ino...

Embodiment 2

[0028] Example 2 Treatment of ammonia-containing wastewater containing refractory organic matter

[0029] During the catalyst production process of an oil refinery, a waste water containing refractory organic matter and ammonia nitrogen will be produced. The water quality characteristics are: pH9.2, COD 900mg / L, BOD 100mg / L, ammonia nitrogen 137mg / L. During the long-term operation of the system, the ammonia nitrogen removal effect is poor, resulting in a total nitrogen concentration of up to 152mg / L, the SVI of the activated sludge is greater than 200mL / g, and the sedimentation performance is poor. Control the sewage treatment temperature at 30°C and pH at 7.5. Add liquid bacterial suspension A to the system every day at 0.1% of the volume of wastewater treated per hour. In the initial stage, the DO in the system is controlled to be about 3.0mg / L. When the ammonia nitrogen removal rate is greater than 50%, the DO is controlled at 1.5 mg / L, when the removal rate of ammonia nit...

Embodiment 3

[0031] Treat the same wastewater as in Example 2. The sewage treatment temperature is 35°C and the pH is 8.5. Add liquid bacterial suspension C to the system every day at 0.05% of the volume of wastewater treated per hour. In the initial stage, the DO in the system is controlled to be about 2.0mg / L. When the ammonia nitrogen removal rate is greater than 70%, the DO is controlled at 1.0 mg / L, when the removal rate of ammonia nitrogen is greater than 85%, control DO at about 0.5 mg / L, and put it in for 15 days. The SVI in the detection system is less than 200mL / g. After one month of operation, the effluent ammonia nitrogen is less than 15mg / L, the total nitrogen is less than 25mg / L, and the COD is less than 80mg / L. It can be seen that the microbial agent can treat wastewater containing refractory organic matter and ammonia nitrogen, and can improve the sedimentation performance of sludge.

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Abstract

The invention discloses a biological processing method of ammonia-containing wastewater. According to the method, sludge in sewage disposal plants is taken as the microbial carrier, a denitrification microbial agent is added under MLSS of 2000 to 3000 g / L; when the removal rate of ammonia nitrogen reaches 50 to 70%, the DO is reduced to 1.0 to 2.0 mg / L, and when the removal rate of ammonia nitrogen reach more than 80%, the DO is reduced to 0.1 to 1.0 mg / L. The microbial agent comprises Arthrobacter creatinolyticus FDN-1, Flavobacterium mizutaii FDN-2, Paracoccus denitrificans DN-3, Methylobacterium phyllosphaerae SDN-3, Kocuria palustris FSDN-A, and Staphylococcus cohnii FSDN-C. According to denitrification characteristics of added microbial agent, the concentration of dissolved oxygen (DO) is controlled so as to efficiently remove ammonia nitrogen and total nitrogen in a reactor; moreover, degradation-resistant organic pollutants in wastewater can be removed efficiently, and the effluent quality is improved.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering wastewater treatment, and in particular relates to a biological treatment method for ammonia-containing wastewater. Background technique [0002] With the aggravation of nitrogen pollution and the continuous enhancement of public awareness of environmental protection, the society's requirements for the environment are increasing. At present, the restrictions on ammonia nitrogen pollutants in external wastewater are more stringent. In 2002, the newly promulgated "Pollutant Discharge Standards for Urban Sewage Treatment Plants" proposed a higher ammonia nitrogen discharge standard (≤8mg / L, if reused≤5mg / L). In the "Twelfth Five-Year Plan", ammonia nitrogen is listed as one of the total control indicators, and some industries and localities will gradually formulate stricter total nitrogen control standards. Therefore, solving the problem of ammonia nitrogen pollution has become an ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F101/16
Inventor 高会杰孙丹凤郭志华李宝忠
Owner CHINA PETROLEUM & CHEM CORP
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