Scale advanced treatment method for livestock and poultry farming waste water

A technology for advanced treatment of livestock and poultry breeding wastewater, applied in the field of advanced treatment of large-scale livestock and poultry breeding wastewater, can solve problems such as increased treatment costs, and achieve the effects of simple operation, good economic and environmental benefits, and simple system structure

Inactive Publication Date: 2010-08-18
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In this new way we have developed a cost-effective and highly effective treatment method that combines several technical features like these two methods together with various other techniques (oxygenation, clotting, decomposition). These improvements make it possible to efficiently remove harmful substances from animal husbandry wastes while minimizing their impact on environment health. Additionally, they are able to kill germ or resist disease microorganisms without adding any chemical agents into them themselves. Overall, our technology helps improve the efficiency and economy of producing high value crops through recirculated domestic sewage systems.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving treatments used during animal husbandry operations with regards to reducing environmental impact caused by excessive amounts of contaminated wastes generated from their facilities' disposal or recirculating back onto crops grown around them. Current methods involve removing pesitamines and antibial agents before draining it downstream, but they cannot efficiently reduce certain types of chemical compounds like PCBs and BHAs due to its low solubility in water. There needs better ways to manage residual materials released through industrial activities while minimizing negative side reactions associated with these substances.

Method used

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  • Scale advanced treatment method for livestock and poultry farming waste water
  • Scale advanced treatment method for livestock and poultry farming waste water
  • Scale advanced treatment method for livestock and poultry farming waste water

Examples

Experimental program
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Effect test

Embodiment 1

[0027] After the wastewater from an intensive pig farm is treated by the Sequential Batch Activated Sludge Process (SBR), the commonly used antibiotics for livestock in the effluent include sulfonamides (sulfamethoxazole, sulfathiazole, sulfamethizole, sulfamethazine , sulfidesoxine) and tiamulin concentrations were added to 1mg / L. Adopt the method of the present invention, in figure 1 The effluent is treated in the Fenton integrated treatment device. The biological treatment effluent continuously enters the sump, and the water inlet valve is kept open to allow the waste water to enter the main reactor. When the liquid level detector indicates that the set liquid level is reached, the water inlet valve is closed to start the Fenton reaction cycle. Under the condition of sufficient stirring, add acid to the main reactor through the acid pump to reduce the pH value of the system. After the pH reaches 5.0, turn on the H 2 o 2 Dosing pump and FeSO 4 Dosing pump, the opening ti...

Embodiment 2

[0033] Due to factors such as seasonal changes and management methods, the water quality of the biological treatment effluent will fluctuate. According to the monitoring results of the type and concentration of antibiotics in the effluent, the dosage of Fenton reagent can be adjusted accordingly. In the biological treatment effluent of an intensive pig farm, sulfonamides (sulfamethoxazole, sulfathiazole, sulfamethizole, sulfamethazine, sulfidexoxine), tetracyclines (tetracycline, oxytetracycline, aureomycin Su) and tiamulin concentrations were added to 0.1mg / L. Adopt the method of the present invention, in figure 1 The effluent is treated in the Fenton integrated treatment device. Two kinds of Fenton reagent dosages are adopted, and the dosage A is [H 2 o 2 ]=1.37mmol / L, [Fe 2+ ]=0.91mmol / L, dosage B is 2 times of A, see Table 2 for the treatment effect of antibiotics and phosphorus. At dosage B, all 9 kinds of antibiotics and phosphorus can be effectively removed. Since ...

Embodiment 3

[0038] In the advanced treatment of wastewater from certain intensive pig farms, through the method of the present invention, two kinds of Fenton reagent dosages are adopted, and the dosage A is [H 2 o 2 ]=1.37mmol / L, [Fe 2+ ]=0.91mmol / L, dosage B is 5 times of A, and the disinfection and sterilization effect of the system is shown in Table 3. Under the dosage A, the total number of bacteria in the wastewater can be from 10 6 The cfu / mL is reduced to 4500cfu / mL to ensure that the number of fecal coliform bacteria in the final effluent reaches the standard specified in GB18596-2001 (10000 / mL). Appropriately increasing the dosage of Fenton's reagent can further improve the disinfection effect.

[0039] Table 3 embodiment 3 processing effect ( Parallel samples n=3)

[0040]

[0041] Total number of bacteria (cfu / mL) *

[0042]

[0043] Biological treatment...

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Abstract

The invention discloses a scale advanced treatment method for livestock and poultry farming waste water. The method of the invention comprises the following steps: (1) adding acid to the livestock and poultry farming waste water after biological treatment, and regulating the pH value of the waste water to be less than or equal to 5.0; (2) adding H2O2 and soluble ferrite to the waste water to carry out oxidation reaction, wherein the mol ratio of the H2O2 to the Fe<2+> in the soluble ferrite is between 1:1 to 2:1; and (3) after carrying out reaction for not less than 10 minutes, adding alkali to reaction liquid, regulating the pH of the reaction liquid to be greater than or equal to 6.0, carrying out flocculating and depositing, and then discharging deposit and waste water according with the discharge standard. By controlling the pH value of the reaction system, the adding proportion of the H2O2 to the FeSO4, and the running time, the invention achieves the treatment effect and optimization of energy consumption. The process effectively oxidizes and decomposes the trace organic pollutants (incretion interferents, antibiotics and the like), simultaneously removes various heavy metals and phosphorus by coagulating sedimentation, inactivates pathogenic bacteria in the waste water, and realizes integrated high-efficiency reinforcement treatment of the livestock and poultry farming waste water.

Description

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Claims

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Application Information

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Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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