Method for reducing cow breeding wastewater treatment load

A breeding wastewater treatment load technology, applied in animal husbandry wastewater treatment, water/sewage treatment, special compound water treatment, etc., can solve problems affecting activated sludge contact, affecting biological treatment process, affecting liquid properties, etc., to achieve cost Low, ensure normal operation, improve the effect of stability

Pending Publication Date: 2022-04-19
TIANJIN CAPITAL ENVIRONMENTAL PROTECTION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the defoaming effect of the chemical defoaming method is more obvious than that of the general physical method, the chemical method often affects the properties of the liquid and adds new pollution, and even organic silicon and other substances interfere with the formation of flocs in the activated sludge and affect the interaction between the activated sludge and the water body. Exposure to affect the subsequent biological treatment process

Method used

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  • Method for reducing cow breeding wastewater treatment load
  • Method for reducing cow breeding wastewater treatment load
  • Method for reducing cow breeding wastewater treatment load

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] On April 25, 2021, the water quality indicators of a dairy cow breeding wastewater were measured as follows:

[0054] COD (mg / L) SS(mg / L) NH3-N(mg / L) TN (mg / L) TP (mg / L) Viscosity (mPa·S) 47600 35400 1820 3300 460 10

[0055] This embodiment adopts figure 1 Process shown

[0056] (1) First pass the wastewater from dairy farms through a 5-20mm grille / solid-liquid separator to filter out large-sized forage debris, animal hair, etc., and the primary sedimentation tank initially removes sediment and organic matter with a large specific gravity in the wastewater , and then transported to the anaerobic reactor through pipelines;

[0057] (2) After the anaerobic fermentation treatment of the anaerobic reactor, the organic matter is fully degraded, and the generated biogas can be used as heating for the sewage treatment system, and the excess biogas can be used as clean energy for comprehensive utilization; the waste inside the anaerobic react...

Embodiment 2

[0073] On May 18, 2021, the water quality indicators of a dairy cow breeding wastewater are as follows:

[0074] COD (mg / L) SS(mg / L) NH3-N(mg / L) TN (mg / L) TP (mg / L) Viscosity (mPa·S) 48600 34240 1820 3540 380 9

[0075] This embodiment adopts figure 2 Process shown

[0076] (1) First filter the wastewater from the dairy farm through a 5-20mm grid / solid-liquid separator;

[0077] (2) Send the waste inside the anaerobic reactor into a 50-200 mesh centrifugal solid-liquid separator to obtain the separated solid as a compost material, and the liquid enters the subsequent treatment process;

[0078] (3) The hydraulic retention time of the anaerobic reactor is 15-35 days, and the temperature is maintained at 25-40°C;

[0079] The water quality of the anaerobic reactor effluent on June 21, 2021 is as follows:

[0080] COD (mg / L) SS(mg / L) NH3-N(mg / L) TN (mg / L) TP (mg / L) Viscosity (mPa·S) 27600 23400 2260 3700 420 9.5 ...

Embodiment 3

[0093] On April 15, 2021, the water quality indicators of a dairy cow breeding wastewater are as follows:

[0094] COD (mg / L) SS(mg / L) NH3-N(mg / L) TN (mg / L) TP (mg / L) Viscosity (mPa·S) 46800 34100 1840 3600 420 10

[0095] This embodiment adopts image 3 Process shown

[0096] (1) First pass the wastewater from the dairy farm through a 5-20mm grid / solid-liquid separator, and the liquid is transported to the anaerobic reactor through pipelines;

[0097] (2) Send the discharge inside the anaerobic reactor into a 50-200 mesh centrifugal solid-liquid separator to obtain separated solids and liquids, the solids are used as compost materials, and the liquids enter the subsequent treatment process;

[0098] (3) The hydraulic retention time of the anaerobic reactor is 25-35 days, and the temperature is maintained at 35-40°C;

[0099] The water quality of the anaerobic reactor effluent on May 21, 2021 is as follows:

[0100] COD (mg / L) S...

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Abstract

The invention discloses a method for reducing cow breeding wastewater treatment load. The method comprises the following steps: pretreating wastewater of a cow breeding farm; carrying out anaerobic fermentation treatment on the pretreated wastewater; carrying out foam separation on the wastewater subjected to anaerobic fermentation to obtain foam and a water body; carrying out two-stage nitrification / denitrification reaction on the separated water body; carrying out oxidation reaction on the water body subjected to biochemical treatment; and discharging the water body after the oxidation reaction into an oxidation pond. The invention provides a'anaerobic reaction-solid-liquid separation-foam separation-two-stage AO-chemical phosphorus removal-oxidation pond 'combined process capable of stably discharging effluent in a standard reaching manner, so that the situation that foams appear in a biological tank can be effectively reduced under the conditions of low energy consumption and no use of a chemical defoaming agent, the operation load of the biological tank is remarkably reduced, and the energy consumption of the biological tank is reduced. Therefore, the existing livestock and poultry wastewater treatment effect is improved. The treatment method is high in impact load resistance, good in treatment effect, stable in operation and good in application prospect.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for reducing the treatment load of dairy cow breeding wastewater. Background technique [0002] Large-scale livestock and poultry farms produce a large amount of accumulated wastewater every day, and livestock and poultry breeding pollution has become one of the main causes of pollution in my country. Dairy cattle breeding wastewater is a typical livestock and poultry breeding wastewater. The wastewater mainly includes urine, residual feces, housing flushing water and feed residues, etc. It is a high-concentration organic wastewater that is difficult to degrade. This type of wastewater often contains high concentrations of organic matter And refractory substances, such as soluble protein, polysaccharides, humic acid, cellulose, etc., the scale of dairy farming, breeding methods, pollution treatment models and management models are different, resulting in large changes in ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/20C02F101/16C02F101/30
CPCC02F9/00C02F2001/007C02F3/30C02F1/725C02F1/78C02F2201/78C02F2305/023C02F2103/20C02F2101/16C02F2101/30
Inventor 王连杰李金河姜威赵立伟张麟王瀚卿张波涛刘鹏
Owner TIANJIN CAPITAL ENVIRONMENTAL PROTECTION GRP CO LTD
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