Treating method for ammonia-containing wastewater

A treatment method and technology of sewage treatment plants, applied in special compound water treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as no effect, improve effluent water quality, and strengthen synergy , the effect of increasing the denitrification rate

Active Publication Date: 2018-06-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Treating method for ammonia-containing wastewater
  • Treating method for ammonia-containing wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 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.

[0026]Treat according to the method of the present invention, adjust the sludge concentration of the treatment system to be 1000mg / L. According to the accelerator concentration in the treatment system is 1.0mg / L, the growth accelerator M1 is added, and the DO in the system is controlled to be about 3.0mg / L at the initial stage. When the ammonia nitrogen removal rate is greater than 50%, add liquid bacterial suspension A to the system every day according to 0.008% of the volume ...

Embodiment 2

[0028] Treat the same waste water as in Example 1, and adjust the sludge concentration of the treatment system to be 1500 mg / L. Add microbial growth promoter M2 according to the concentration of accelerator in the treatment system at 1.0mg / L, and control the DO in the system at about 2.5mg / L at the initial stage. When the ammonia nitrogen removal rate is greater than 70%, add liquid bacterial suspension B to the system every day at 0.005% of the volume of wastewater treated per hour, and add microbial growth promoters according to the accelerator concentration in the reaction system at 0.5mg / L N2, while controlling DO at about 1.5mg / L. When the removal rate of ammonia nitrogen is greater than 85%, DO is controlled at about 0.4mg / L and administered for 13 days. The sewage treatment temperature is 25°C and the pH is 8.5. The SVI in the detection system is less than 200mL / g. After one month of operation, the concentration of ammonia nitrogen in the effluent after analysis and t...

Embodiment 3

[0030] A chemical wastewater containing refractory organic pollutants, the water quality characteristics are: COD is about 2000mg / L, BOD is about 450mg / L, ammonia nitrogen is about 150mg / L, and pH is 8.7. After using the conventional activated sludge treatment process, the COD of the effluent is still as high as 300mg / L, the ammonia nitrogen is still as high as 200mg / L, and the total nitrogen is as high as 250mg / L.

[0031] Treat according to the method of the present invention, and adjust the sludge concentration of the treatment system to be 2000mg / L. Add microbial growth promoter M3 according to the concentration of accelerator in the treatment system at 0.8mg / L, and control the DO in the system at about 2.0mg / L at the initial stage. When the removal rate of ammonia nitrogen is greater than 60%, add liquid bacterial suspension C to the system every day according to 0.008% of the volume of wastewater treated per hour, and add microbial growth promoter according to the accele...

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Abstract

The invention relates to a treating method for ammonia-containing wastewater. The treating method comprises the following steps: with activated sludge as a carrier, feeding a growth promoter M under the condition that MLSS is 1000 to 2000 mg / L and controlling DO to be 2.0 to 4.0 mg / L; when the removal rate of ammonia nitrogen reaches 50 to 70%, adding a denitrification microbial agent and a growthpromoter N and reducing DO to 1.0 to 2.0 mg / L; and when the removal rate of ammonia nitrogen reaches 80% or more, lowering DO to 0.1 to 1.0 mg / L, wherein the growth promoter M comprises at least oneselected from a group consisting of trehalose lipid, sophorolipid and rhamnolipid, and the growth promoter N comprises glycolipid, sugar alcohol and an organic acid salt. According to the treating method, the specific denitrification microbial agent and different growth promoters are added into a wastewater treatment system and the concentration of dissolved oxygen is controlled, so high-efficiency removal ammonia nitrogen and total nitrogen in a same reactor is realized, persistent organic pollutants in wastewater can be removed, and the quality of effluent is improved.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a 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 important task of environmental prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F101/30
CPCC02F3/34C02F2101/30C02F2305/06
Inventor 高会杰陈明翔孙丹凤郭志华赵胜楠
Owner CHINA PETROLEUM & CHEM CORP
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