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Livestock breeding liquid dung acidifying and storing method

A livestock and poultry breeding and excrement technology, which is applied in the field of resource utilization of agricultural waste, can solve the problems of carbon and nitrogen loss and large emissions, and achieve the effects of increasing production, reducing ammonia emissions, and convenient operation

Inactive Publication Date: 2019-03-26
ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a method for acidifying and storing livestock and poultry breeding manure in view of the problems in the prior art that the emission of harmful gases such as greenhouse gases and ammonia is large, and the loss of carbon and nitrogen elements is serious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Pass 50L of livestock and poultry breeding manure into the adjustment tank, slowly add 50mL of 96% concentrated sulfuric acid, keep stirring, and adjust the pH of the manure to 5.5. Livestock and poultry breeding manure comes from pig farm manure with dry manure cleaning process, without solid-liquid separation, pH is 7.1, COD is 7665mg / L, total nitrogen is 1200mg / L, ammonia nitrogen is 890mg / L, and total phosphorus is 108mg / L, solid content 6.2%.

[0029] (2) 24 hours after the initial acidification of the manure, the pH rises to 6.1, slowly add 30mL of 96% concentrated sulfuric acid, and keep stirring to adjust the pH of the manure to 5.5. At 72 hours after the initial acidification of the manure, the pH rose to 6.2. Slowly add 10 mL of 96% concentrated sulfuric acid and keep stirring to adjust the pH of the manure to 5.5.

[0030] (3) After 5 days of initial acidification, the acidified dung water in the adjustment tank is passed into the storage tank. The depth...

Embodiment 2

[0033] (1) Pass 50L of livestock and poultry breeding manure into the adjustment tank, dissolve 300 grams of industrial alum with a particle size of less than 80 mesh and a mass fraction greater than 99% in 4L of water, add slowly, continue stirring, and adjust the pH of the manure to 6.0 . Livestock and poultry breeding manure comes from pig farm manure with water flushing manure process, without solid-liquid separation, pH is 6.8, COD is 12688mg / L, total nitrogen is 1654mg / L, ammonia nitrogen is 1360mg / L, solid content 4.0%.

[0034] (2) Forty-eight hours after the initial acidification of the manure, the pH rose to 6.5, and continued stirring to adjust the pH of the manure to 6.0.

[0035] (3) After 5 days of initial acidification, pass the acidified dung water in the adjustment tank into the storage tank. The depth of the storage tank is 1.5m, and the storage height of the dung water is 1m. The surface of the dung water in the storage tank is evenly covered with crushed c...

Embodiment 3

[0038] (1) Pass 50L of livestock and poultry breeding manure into the adjustment tank, slowly add 30mL of 96% concentrated sulfuric acid, keep stirring, and adjust the pH of the manure to 6.0. Livestock and poultry breeding manure comes from dairy farm manure with dry manure cleaning process. It has undergone solid-liquid separation, pH is 7.5, COD is 8762mg / L, total nitrogen is 1054mg / L, ammonia nitrogen is 860mg / L, solid content 12.0%.

[0039] (2) 24 hours after the initial acidification of the manure, the pH rises to 6.8, slowly add 30mL of 96% concentrated sulfuric acid, and keep stirring to adjust the pH of the manure to 6.0. At 72 hours after the initial acidification of the manure, the pH rose to 6.4. Slowly add 15 mL of 96% concentrated sulfuric acid and keep stirring to adjust the pH of the manure to 6.0.

[0040] (3) After 5 days of initial acidification, the acidified dung water in the adjustment tank is passed into the storage tank. The depth of the storage tank ...

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Abstract

The invention discloses a livestock breeding liquid dung acidifying and storing method. The method utilizes an acidifying agent to regulate the pH value of livestock breeding liquid dung to 5.0-6.5; the liquid dung is effectively stored for no less than 60 days, and accordingly the purpose of acidifying and storing the livestock breeding liquid dung is realized. The method is easy and feasible, and low in cost; the livestock breeding liquid dung stored by utilizing the method can effectively maintain the nitrogen content, reduce ammonia volatilization and reduce emission of greenhouse gases such as methane, meanwhile, can be directly returned to the field to be applied, so as to improve the crop yield, and has good ecological environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of agricultural waste, and in particular relates to a method for acidifying and storing livestock and poultry breeding manure. Background technique [0002] With the rapid development of large-scale farming in my country, the discharge of manure from livestock and poultry farming has increased sharply, and it has become one of the important sources of agricultural non-point source pollution, greenhouse gas and ammonia emissions. At present, the treatment methods of livestock and poultry manure mainly include anaerobic fermentation for biogas production, industrial water treatment and agricultural manure storage. Agricultural storage is an important link between planting and breeding combined with circular agriculture, and has become an important way of manure and water resources. [0003] The farmland application of liquid manure is low in cost and easy to implement. It can not only ...

Claims

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Application Information

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IPC IPC(8): C05F3/00C02F11/00
CPCC02F11/00C05F3/00Y02A40/20
Inventor 丁京涛沈玉君孟海波程红胜张朋月
Owner ACADEMY OF PLANNING & DESIGNING OF THE MINIST OF AGRI
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