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A method for anti-seepage reconstruction of sewage storage tanks in large-scale livestock and poultry farms

A technology for storage pools and farms is applied in the field of pollution prevention and control of large-scale livestock and poultry breeding, which can solve the problems of poor anti-seepage effect and high engineering cost, and achieve the effects of prolonging service life, saving investment costs, and promoting and applying value.

Active Publication Date: 2016-06-08
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: combine the current construction status of large-scale livestock and poultry farms or sewage storage tanks in breeding areas, and aim at the defects of high engineering cost or poor anti-seepage effect involved in the traditional anti-seepage transformation method, to provide a kind of sewage storage tank that meets the structural strength requirements. The anti-seepage transformation method of large-scale livestock and poultry farm sewage storage tanks with relatively economical and reasonable investment, good anti-seepage effect and long service life

Method used

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  • A method for anti-seepage reconstruction of sewage storage tanks in large-scale livestock and poultry farms
  • A method for anti-seepage reconstruction of sewage storage tanks in large-scale livestock and poultry farms

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Embodiment 1

[0023] The demonstration application project of the present invention is located in the Chongming Beibataki Dairy Cattle Breeding District in the southeast of the Beibataki Reclamation Area of ​​the Modern Agricultural Park in Chongming County, Shanghai. The geographical coordinates of the center of the field are E121.85°, N31.58°. The breeding community keeps 1,500 lactating cows all year round, and the sewage production is about 50 tons per day. The sewage adopts the "anaerobic-storage-returning" treatment process, matching more than 750 acres of cauliflower-corn rotation fields, and has a reinforced concrete anaerobic The oxygen pool is 500 cubic meters, and the sewage storage tank with pool wall revetment is 2820 cubic meters. Since the longest off-season of fertilization is more than 50 days, in the pollution reduction project implemented in 2011, the breeding area adopted the anti-seepage modification method of the present invention to transform the original sewage storag...

Embodiment 2

[0027]One of the application projects of the present invention is located in the Pudong New Area Hangtou Pig Breeding Cooperative Farm in Fengqiao Village, Hangtou Town, Pudong New Area. The geographical coordinates of the center are: E121.5677°, N31.0031°. The farm keeps 950 sows (the largest scale is 1,000) and slaughters 14,500 pigs per year. The sewage production is about 60 tons per day. The sewage adopts the "anaerobic-storage-returning" treatment process. Matching field return area of ​​1,100 mu (525 mu of rice, 575 mu of vegetables), transformation of anaerobic treatment pools of 1,450 cubic meters, and a total volume of sewage storage tanks of 4,350 cubic meters, but 2,187 cubic meters of them are all-earth pools (all-soil storage pools), Does not have anti-seepage function. Since the total volume of the sewage storage tank on the site must meet the longest fertilization off-season of more than 70 days, the 2187 cubic meter earthen tank must be used after anti-seepage...

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Abstract

The invention discloses a seepage-proof modification method for sewage storage pools of large-scale livestock and poultry farms. The pool bottom and pool walls are constructed synchronously by means of the once-forming construction process, and a seepage-proof structure employs a modification process which integrates a plain concrete cushion layer, an HPDE (high-density polyethylene) seepage-proof film and a concrete block pressure cover. Pool wall modification of the pool walls includes: modifying an all-soil storage pool, adding the plain concrete cushion layer to a compacted foundation soil layer of an original pool wall, adhering the HPDE seepage-proof film, and paving a layer of concrete blocks. Modification of a storage pool with a soil bottom and retaining walls around includes: roughening contact surfaces of original reinforced concrete retaining walls, adhering the HPDE seepage-proof films, and paving a layer of concrete blocks. Pool bottom modification includes: digging to an old soil layer, adding a plain concrete cushion layer, laying an HPDE seepage-proof film, and paving a layer of concrete blocks. The seepage-proof modification method has the advantages that seepage-proof effects can meet seepage-proof requirements of the reinforced concrete pools, the seepage-proof films can be protected effectively to prevent the problem of 'bumps' caused by rise of groundwater level, and service lives of the seepage-proof films can be prolonged greatly.

Description

technical field [0001] The invention belongs to the technical field of pollution prevention and control of large-scale livestock and poultry breeding, and specifically relates to an anti-seepage transformation method suitable for sewage storage tanks of large-scale livestock and poultry farms or breeding communities in southern plains and river network areas. Background technique [0002] According to the Bulletin of the First National Survey of Pollution Sources issued in February 2010, the chemical oxygen demand (COD) and ammonia nitrogen (NH 3 -N) emissions accounted for 44% and 57% of the total pollutant emissions, respectively. Among them, COD and NH in the livestock and poultry industry 3 -N emissions accounted for 96% and 44% of total emissions from agricultural sources. Therefore, in the "12th Five-Year" Comprehensive Work Plan for Energy Conservation and Emission Reduction" (Guofa [2011] No. Governance is the top priority, requiring large-scale livestock and poul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E03F5/10E02D31/00
CPCE02D31/002E02D31/004E02D2300/002E02D2450/106E03F5/10
Inventor 王振旗沈根祥钱晓雍陈伟徐文倩陈静洪祖喜汤正泽
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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