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Device for treating high ammonia-nitrogen wastewater and method thereof

A high-ammonia-nitrogen, waste water technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as unstable effluent quality, complex process flow, and long effluent sedimentation time

Active Publication Date: 2015-09-30
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, for the treatment of wastewater with high ammonia nitrogen and low C / N, although various combined processes in the above studies can achieve good denitrification effects, there are still problems such as COD removal not up to standard, complicated process or high sludge concentration (10000mg / L The above) caused many problems such as long precipitation time of effluent, unstable effluent quality, etc.

Method used

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  • Device for treating high ammonia-nitrogen wastewater and method thereof
  • Device for treating high ammonia-nitrogen wastewater and method thereof
  • Device for treating high ammonia-nitrogen wastewater and method thereof

Examples

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Effect test

Embodiment 1

[0080] Embodiment 1, the device for processing high ammonia nitrogen wastewater

[0081] Such as figure 1 As shown, the device for treating high ammonia nitrogen wastewater of the present invention includes a water inlet system, a reaction system, an aeration system, a carbon source dosing system, a water outlet system and a real-time control system;

[0082] Described reaction system comprises a reactor, and described reactor is a container with cover, is divided into three parts, is successively anoxic pool (2.0), aerobic pool (3.0) and membrane separation pool (4.0):

[0083] An agitator (2.1) is provided above the anoxic pool, a sampling valve 1 (2.2) is provided on the side wall of the anoxic pool, a reflux liquid inlet (2.3) is provided at the bottom of the side wall, and a ORP probe (2.4);

[0084] An overflow weir (3.1) is provided between the anoxic pool and the aerobic pool, and a pH probe (3.2), a dissolved oxygen DO probe (3.3), a sampling valve 2 (3.4) and a dra...

Embodiment 2

[0092] Embodiment 2, using A / O MBR semi-continuous operation process to treat livestock and poultry breeding wastewater

[0093] Using the device in Example 1 to treat a certain intensive livestock and poultry breeding wastewater, the temperature of the reactor is controlled at 25 ± 0.5 ° C, including the following steps:

[0094] Inoculate the return sludge of urban sewage treatment plant with a concentration of 5500mg / L into the anoxic pool and the aerobic pool, turn on the agitator, aeration system I (aeration flow rate of 2L / min), aeration system II (aeration The flow rate is 10L / min, and the aeration rate for the entire membrane flushing is set according to two membranes), the water inlet pump and the implementation control system adopt the method of gradient water (sewage) inlet, so that the sludge concentration gradually increases to 8500-9500mg / L, Gradient water inflow control is as follows: the first stage is 7 days, the influent water is diluted to 1 / 4 of the origin...

Embodiment 3

[0110] Embodiment 3, using A / O MBR semi-continuous operation process to treat landfill leachate

[0111] Using the device in Example 1 to treat a certain landfill leachate, the temperature of the reactor is controlled at 25 ± 0.5 ° C, including the following steps:

[0112] Inoculate the return sludge of urban sewage treatment plant with a concentration of 5500mg / L into the anoxic pool and the aerobic pool, turn on the agitator, aeration system I (aeration flow rate of 1.5L / min), aeration system II (aeration The air flow rate is 15L / min), the water inlet pump and the implementation control system adopt the gradient water (sewage) method to gradually increase the sludge concentration to 6500-7500mg / L, and the gradient water inlet control is as follows: the first stage is 7 On the 7th, the incoming water is diluted to 1 / 4 of the concentration of the original sewage. The second stage is 7 days, and the incoming water is diluted to 1 / 2 of the original sewage concentration. The thi...

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Abstract

The invention discloses a device for treating high ammonia-nitrogen wastewater and a method thereof. The method comprises the following steps: inoculating activated sludge to an anoxic tank and an aerobic tank to fill the anoxic tank with activated sludge, turning on a stirrer and repeating the following steps: 1) a water feed pump is turned on and sequencing batch feeding of water is adopted, and according to design treatment capacity, high ammonia-nitrogen wastewater to be treated is inputted into the anoxic tank and then flows into the aerobic tank through a downflow weir; 2) in the anoxic tank, nitrate nitrogen in the wastewater is reduced under the action of a carbon source; an aeration system is turned on, and ammoniacal nitrogen and organic matters in the wastewater are oxidized in the aerobic tank; and the aeration system is turned off; 3) in a membrane separation tank, design treatment capacity-based nitrated wastewater is filtered with a membrane in a membrane module and then the filtered wastewater is discharged; in the anoxic tank and the membrane separation tank, wastewater which is 3 times less than the design treatment capacity flows back to the anoxic tank; and in the anoxic tank, the same amount of denitrified wastewater flows into the aerobic tank through the overflow weir. By combining the A / O technology and the membrane separation technology, efficient mud-water separation can be realized, and stable effluent quality can be obtained.

Description

technical field [0001] The invention relates to a device and a method for treating high-ammonia-nitrogen wastewater, in particular to a device and a method for treating high-ammonia-nitrogen wastewater by using A / O technology and membrane treatment technology. Background technique [0002] With the increasingly serious water pollution in our country, the sewage discharge standards will continue to be tightened, and the treatment efficiency of traditional sewage biological treatment processes needs to be improved urgently. In 1989, Yamamoto K et al. published the first research on submerged MBR. Compared with the external MBR, the submerged MBR has the advantages of reduced energy consumption and compact footprint due to the omission of the circulating pump, and has gradually been favored in research and engineering applications. Pay attention to (YamamotoK, HiasaH, TalatM, et al. 1989. Direct solid liquid separation using hollowfibe membranes in activated sludge aeration tan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
Inventor 陈梅雪姜超郁达伟张岚刘吉宝隋倩文魏源送
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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