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Method for purifying manure fermentation borth in dairy farm by loaches

A technology for fermentation liquid and dairy farms, applied in animal houses, climate change adaptation, fish farming, etc., can solve the problems of high ammonia nitrogen and total phosphorus content, affecting water quality, environmental pollution, etc., to achieve no secondary pollution, Realize the effect of resource utilization and strong operability

Active Publication Date: 2012-12-12
安徽水韵环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the breeding and production process of dairy farms, a large amount of cow dung and urine and cattle house flushing wastewater will be produced. These wastewaters contain a large amount of pollutants such as nitrogen and phosphorus. If they are not properly treated, they will cause serious environmental pollution.
[0003] At present, the anaerobic fermentation biogas process is adopted as an effective way to solve the pollution of livestock and poultry manure. Although the biogas project has produced huge energy benefits, the content of ammonia nitrogen and total phosphorus in the fermentation liquid is high, and direct discharge will affect the water quality.
Due to the continuous increase of large and medium-sized farms, the amount of fermented liquid produced is far greater than the demand for agricultural fertilizers. Untreated fermented liquid is discharged into natural water bodies, resulting in a large amount of nitrogen and phosphorus loss, causing pollution to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In a breeding pond with an area of ​​0.6 mu, the quartz sand with a particle size of 2-3mm is spread to the bottom of the breeding pond. The height of the quartz sand is 200mm. After mixing, pour it into the culture pond and keep the water depth at 800mm. Select large-scale loach seedlings with better activity, individual length 5-8cm, body weight 1-3g, after soaking in 0.9% normal saline for 10min to sterilize and disinfect, 300kg per mu according to the area of ​​the culture pond (about 1.5×10 5 Tail) loach seedlings are stocked at a stocking density, the breeding cycle is 120-160 days, and the survival rate can reach 95%. The initial ammonia nitrogen in the water body was 19.04 mg / L, and the total phosphorus was 5.82 mg / L.

[0017] Loach feeds on the symbiotic microorganisms in the fermentation broth during the growth process, mainly filamentous algae, cyanobacteria and various protozoa, so there is no need to add loach bait. After 160 days, the reduction of total ...

Embodiment 2

[0019] In a breeding pond with an area of ​​0.9 mu, the quartz sand with a particle size of 2-3mm is spread to the bottom of the breeding pond. The height of the quartz sand is 250mm. Mixed, poured into the culture pond, keep the water depth 900mm. Select large-scale loach seedlings with better activity, individual length 8-10cm, body weight 3-7g, after soaking in 0.9% normal saline for 10min to sterilize and sterilize, use 280kg per mu (about 5.6×10 4 Tail) loach seedlings are stocked at a stocking density, the breeding cycle is 120-160 days, and the survival rate can reach 93%. The initial ammonia nitrogen of the water body is 20.13mg / L, and the total phosphorus is 6.83mg / L.

[0020] Loach feeds on the symbiotic microorganisms in the fermentation broth during the growth process, mainly filamentous algae, cyanobacteria and various protozoa, so there is no need to add loach bait. After 160 days, the reduction of total phosphorus by loach was 1.14×10 per mu 5 mg; the reducti...

Embodiment 3

[0022] In a breeding pond with an area of ​​1.5 mu, the quartz sand with a particle size of 2-3mm is spread to the bottom of the breeding pond. The height of the quartz sand is 250mm. Mixed and poured into the breeding pond, the effective water depth is 900mm. Select large-scale loach seedlings with better activity, individual length 10-13cm, body weight 7-13g, after soaking in 0.9% normal saline for 10min to sterilize and disinfect, 250kg per mu (about 2.5×10 4 Tail) loach seedlings are stocked at a stocking density, the breeding cycle is 120-160 days, and the survival rate can reach 90%. The initial ammonia nitrogen in the water body is 23.78mg / L, and the total phosphorus is 7.91mg / L.

[0023] Loach feeds on the symbiotic microorganisms in the fermentation broth during the growth process, mainly filamentous algae, cyanobacteria and various protozoa, so there is no need to add loach bait. After 160 days, the reduction of total phosphorus by loach was 9.27×10 per mu 4 mg; t...

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PUM

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Abstract

The invention discloses a method for purifying manure fermentation borth in a dairy farm by loaches, which belongs to the field of environmental protection. The method comprises the following steps of: paving quartz sand with the grain diameter of 2-3mm on the bottom of a culture pond, mixing the dairy cattle manure fermentation borth with clean river water or lake water according to a volume ratio of 1:1 and pouring into a culture pond, choosing active loach seeds which are individually 5-13cm in length and 1-13g in weight, soaking by 0.9% of normal saline for 10min and then sterilizing and disinfecting; adding the loach seeds into the culture pond to cultivate according to the stocking density that the total weight of the loach seeds is 250-300kg in per mu of the culture pond, wherein the loaches eat symbiotic microorganisms in the fermentation borth in a growth process. The method provided by the invention makes use of a biological method to achieve purposes of greatly decreasing the water quality index of the manure fermentation borth in the dairy farm, providing nutrient substances needed by the growth and reproduction of the loaches without adding loach baits, saving the culture cost, and purifying the manure fermentation borth in the dairy farm based on the guarantee of the survival rate of the loaches.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a method for purifying dairy farm manure fermented liquid with loach. Background technique [0002] With the continuous improvement of material living standards, people's demand for dairy products is also increasing, and dairy farming is gradually intensified, scaled and transformed. The large-scale production of dairy farming ensures the people's demand for dairy products, but environmental problems also follow. During the breeding and production process of dairy farms, a large amount of cow dung and urine and cattle house flushing wastewater will be produced. These wastewaters contain a large amount of pollutants such as nitrogen and phosphorus. If they are not properly treated, they will cause serious environmental pollution. [0003] At present, the anaerobic fermentation biogas process is adopted as an effective way to solve the pollution of livestock and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A01K1/01
CPCY02A40/81
Inventor 张文艺陈雪珍韩有法张采芹李仁霞
Owner 安徽水韵环保股份有限公司
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