Method for treating waste water of aquatic bird cultivation through utilizing microalgae

A water poultry breeding wastewater and microalgae technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., to achieve a high comprehensive utilization rate

Inactive Publication Date: 2015-12-16
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there is no report of using algae to treat waterfowl breeding wastewater, so it is of great significance to use algae to treat waterfowl breeding wastewater and make resource utilization

Method used

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  • Method for treating waste water of aquatic bird cultivation through utilizing microalgae

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] S1. Put the waterfowl breeding wastewater into the grit chamber for sedimentation to remove large particles;

[0027] S2. Put the sedimented waterfowl breeding wastewater into an anaerobic tank for fermentation, the pH value is controlled at 6.0, the temperature is 25°C, the rotation speed of the agitator is 100rmp, and the fermentation time is 24 hours;

[0028] S3. Putting the waterfowl breeding wastewater through anaerobic fermentation into an open breeding pond to inoculate Chlorella pyrenoidesa and carry out open cultivation; wherein, the inoculation amount of Chlorella pyrenoidosa is 15% of the waterfowl breeding wastewater volume; pH is controlled The value is 6.0, the temperature is 25°C, the light intensity is 2500lx, and the culture time is 2d;

[0029] S4. Put the waterfowl breeding waste water treated in step S3. into a closed bioreactor, and feed carbon dioxide to continue the reaction; control the volume fraction of carbon dioxide in the air in the closed ...

Embodiment 2

[0032] S1. Put the waterfowl breeding wastewater into the grit chamber for sedimentation to remove large particles;

[0033] S2. Put the sedimented waterfowl breeding wastewater into an anaerobic tank for fermentation, the pH value is controlled at 5.0, the temperature is 20°C, the rotation speed of the agitator is 50rmp, and the fermentation time is 12 hours;

[0034] S3. Putting the water fowl breeding waste water through anaerobic fermentation into an open culture pond to inoculate Chlorella pyrenoidesa and carry out open culture; wherein, the inoculation amount of Chlorella pyrenoidosa is 10% of the water fowl breeding waste water volume; control pH The value is 7.0, the temperature is 32°C, the light intensity is 2000lx, and the culture time is 1d;

[0035] S4. Put the waterfowl breeding waste water processed through step S3. into a closed bioreactor, and feed carbon dioxide to continue the reaction; control the volume fraction of carbon dioxide in the air in the closed b...

Embodiment 3

[0038] S1. Put the waterfowl breeding wastewater into the grit chamber for sedimentation to remove large particles;

[0039] S2. Put the sedimented waterfowl breeding wastewater into an anaerobic tank for fermentation, the pH value is controlled at 8.0, the temperature is 30°C, the rotation speed of the agitator is 200rmp, and the fermentation time is 24 hours;

[0040] S3. Putting the water fowl breeding waste water through anaerobic fermentation into an open culture pond to inoculate Chlorella pyrenoidesa and carry out open culture; wherein, the inoculation amount of Chlorella pyrenoidosa is 20% of the water fowl breeding waste water volume; control pH The value is 7.0, the temperature is 32°C, the light intensity is 3000lx, and the breeding time is 3 days;

[0041] S4. Put the waterfowl breeding waste water treated in step S3. into a closed bioreactor, and feed carbon dioxide to continue the reaction; control the volume fraction of carbon dioxide in the air in the closed bi...

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Abstract

The invention relates to the technical field of waste water treatment, and specifically discloses a method for treating waste water of aquatic bird cultivation through utilizing microalgae. The method comprises the following step: S1, precipitating the waste water of aquatic bird cultivation to remove large-particle substances; S2, performing anaerobic fermentation of the precipitated waste water of aquatic bird cultivation; S3, inoculating the waste water of aquatic bird cultivation after anaerobic fermentation with microalgae, and performing open cultivation; and S4, putting the waste water, treated through S3, of aquatic bird cultivation into a closed biological reactor, and inletting carbon dioxide for continuous reaction. The method has advantages of high efficiency, a high comprehensive utilization rate, environment protection, and the like. The average removal rate of COD, TN, and TP is over than 90%, 70%, and 70%, respectively.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for treating waterfowl breeding wastewater by using microalgae. Background technique [0002] China is a big country producing wastewater from waterfowl breeding, and a large household of sewage discharge. Water poultry breeding wastewater is mainly composed of feed residues, mixed feces and housing flushing water, of which flushing water accounts for the vast majority. It is characterized by large displacement, relatively concentrated washing time, low temperature, mixed solid and liquid in wastewater, high fiber content and organic content, small solid volume, and difficult to separate organic wastewater. COD, BOD and other indicators in the wastewater are seriously exceeded, the amount of suspended solids is large, and the content of nitrogen and phosphorus is rich and difficult to remove. It has the following characteristics: (1) High COD and high conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 刘晖王琴明彩兵陈卓柳建良
Owner ZHONGKAI UNIV OF AGRI & ENG
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