Method and equipment for treating swine wastewater

A waste water and equipment technology, which is applied in the direction of sludge treatment, filtration treatment, water/sewage treatment, etc., can solve the problems affecting the health and normal life of residents, high waste water stock, large floor area, etc., to achieve excellent water quality, The effect of reducing handling pressure and occupying a small area

Inactive Publication Date: 2017-10-03
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using biochemical methods to treat pig wastewater, the treatment cycle is long, and the hydraulic retention time usually ranges from 1 week to 20 days; this leads to high wastewater storage in the system, relatively complex equipment in the system, large footprint, and difficulty in automation; at the same time, Large-scale equipment is difficult to seal. During operation, a large amount of malodorous gas diffuses into the surrounding environment, causing serious air pollution in the surrounding area, affecting the health and normal life of residents; and it is difficult to meet the national standard for effluent water quality

Method used

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  • Method and equipment for treating swine wastewater
  • Method and equipment for treating swine wastewater
  • Method and equipment for treating swine wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 In the shown treatment process, the pig raising wastewater is treated by sand filtration, and the solid particles of the pig raising wastewater are filtered.

[0044] The water quality of pig raising wastewater after filtration is shown in the table:

[0045] Table 1-1 Water Quality Analysis of Pig Raising Wastewater

[0046]

[0047] Regulate described waste water pH value with sulfuric acid to be 5, drop into FeSO2 by the amount of 50mmol / L subsequently 4 , according to 1 / 3.5 of the volume of wastewater to be treated into 30% mass concentration of H 2 o 2 Solution, reaction time 24h. The comparison of wastewater quality after treatment according to the stated conditions and before treatment is shown in the following table:

[0048] Table 1-2 Comparison of water quality of water samples before and after Fenton oxidation treatment under suitable conditions

[0049]

[0050] Fenton oxidation treatment COD under this condition Cr The removal ra...

Embodiment 2

[0058] Such as figure 2 In the shown treatment process, the raw material treatment of the pig raising wastewater is carried out by means of filter bed filtration, and the solid particles of the pig raising wastewater are filtered.

[0059] The water quality of pig raising wastewater after filtration is shown in the table:

[0060] Table 2-1 Water Quality Analysis of Pig Raising Wastewater

[0061]

[0062] Inject sulfuric acid to adjust the pH value of wastewater to 5, and then add FeSO in an amount of 50mmol / L 4 , according to 1 / 10 of the volume of wastewater into 30% mass concentration of H 2 o 2 Solution, reaction time 10h. The comparison of wastewater quality after treatment according to the stated conditions and before treatment is shown in the following table:

[0063] Table 2-2 Comparison of water quality of water samples before and after Fenton oxidation treatment under suitable conditions

[0064]

[0065] Fenton oxidation treatment by this condition, COD...

Embodiment 3

[0073] Such as figure 2 In the shown treatment process, the raw material treatment of the pig raising wastewater is carried out by means of sand filtration, and the solid particles of the pig raising wastewater are filtered.

[0074] The water quality of pig raising wastewater after filtration is shown in the table:

[0075] Table 3-1 Water Quality Analysis of Pig Raising Wastewater

[0076]

[0077]

[0078] Inject sulfuric acid to adjust the pH value of wastewater to 2, and then add FeSO in an amount of 50mmol / L 4 , according to 1 / 3.5 of the volume of wastewater into 30% mass concentration of H 2 o 2 Solution, reaction time 24h. The comparison of wastewater quality after treatment according to the stated conditions and before treatment is shown in the following table:

[0079] Table 3-2 Comparison of water quality of water samples before and after Fenton oxidation treatment under suitable conditions

[0080]

[0081] Fenton oxidation treatment COD under this ...

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Abstract

The invention relates to a fast, efficient and sanitary method and equipment for treating swine wastewater. The method comprises the following steps: filtering solid particles out of stoste; feeding filtrate into a Fenton oxidation tank, adjusting the pH value to 2-6 and adding 5-50 mmol / L of Fe<2+> and H2O2 with the mass concentration of 30% (the volume ratio of the H2O2 and the wastewater is 1 / 20-1 / 3.) for a Fenton reaction for 10-24 h; feeding supernate into a deferrization treatment tank, adding an alkalinous metal compound, stirring the mixture for 1-10 min and performing a Fe ion sedimentation reaction for 1-5 h; and feeding supernate into a denitrification treatment tank, adding a medicament containing phosphate radicals and Mg<2+> after dissolution at a molar ratio (being 1:1:(1-1.3) of N to P to Mg, stirring the mixture for 1-10 min and performing a reaction on magnesium ammonium phosphate for 1-5 h. The waste water treated by the method meets the national grade-1 standard of wastewater discharge. Additionally, after filter pressing is carried out on solid precipitates generated in all the steps, the solid precipitates are treated safely as solid wastes, and liquid formed by filter pressing flows back to the stoste. The method and the equipment are suitable for treating urine and wastewater of a pig farm and have the advantages of being short in cycle, high in efficiency, good in effect, sanitary in implementation environment and the like.

Description

technical field [0001] The invention relates to the fields of agriculture, animal husbandry and environmental protection, in particular to a method and equipment for treating pig wastewater by chemical methods. Background technique [0002] With the rapid development of my country's livestock and poultry breeding industry, the traditional decentralized management has gradually been replaced by intensive and large-scale farming methods. The centralized discharge of a large amount of waste water rich in high-concentration organic pollutants such as livestock manure and urine poses a great potential threat to the environmental safety of surrounding waters and soil. Large-scale breeding enterprises urgently need a fast and efficient treatment technology to meet The national limit standard for livestock and poultry breeding wastewater discharge. The survey shows that among the pollution factors of livestock and poultry breeding wastewater, the pollution index of pig wastewater i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/20
CPCC02F9/00C02F1/001C02F1/586C02F1/64C02F1/66C02F1/722C02F11/122C02F2103/20C02F2209/08C02F2209/14C02F2301/046C02F2305/026
Inventor 吴畏刘蓓蓓
Owner NORTHEASTERN UNIV
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