Animal husbandry – Confining or housing – Permanent building
Patent
1996-05-08
1998-03-31
Swiatek, Robert P.
Animal husbandry
Confining or housing
Permanent building
119447, 119527, A01K 101
Patent
active
057326584
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a stable comprising a floor provided with an outlet for manure and urine to a collection chamber or pit situated below a stable grid, which collection chamber is provided with a bottom which is composed of, or covered by, a number of gutters placed parallel to one another and each having two substantially straight side walls, a bottom surface and an open top end, the gutters forming a bottom plate which covers the entire bottom of the pit. The invention also relates to an improved method for flushing the stable with the thin fraction of the manure.
A stable having such a floor for the shallow pit is known, for example, from the American Patent U.S. Pat. No. 4,520,759. The bottom of the stable shown is provided with grids underneath which bottom sections are disposed, which bottom sections are shaped in such a way that a number of gutters positioned parallel to one another have been produced. The purpose of the gutters is to drain the urine and manure to a storage tank or slurry pit. The bottom of the gutters is positioned so as to be slightly sloping in order to facilitate drainage. Between the gutters there are ribs which serve to be able to support the grids placed across the gutters. These grids form the floor of the stable, across which the livestock can walk.
A drawback of this known stable is that manure can easily remain between the grids and the top edge of the support ribs; moreover, the urine or thin fraction of the manure can leak through between the seams formed mutually by the bottom elements and the walls of the pit and the bottom elements to the chamber underneath the gutters. As a result, the subsoil of the pit will become polluted, most certainly if no floor is fitted under the floor sections, or a floor whose thickness is insufficient.
Generally known are stables for livestock, such as pigs, cows etc., in which the manure and slurry are collected for example, shallow pits. At regular intervals, for example twice a day, these shallow pits are then flushed clean, and the manure and the slurry are stored for subsequent spreading, after a certain time, over the farmland. As the raising of livestock is carried out more and more intensively, more and more manure and slurry are being produced. It has been found that this results in strong acidification of the environment and of nature. Acidification is promoted by nitrogen and sulphur compounds, of which ammonia is one. Consequently, methods have now been developed for reducing the acidification which occurs as result of, inter alia, the ammonia emission from the manure. Manure flushing systems have therefore been developed, by means of which the ammonia emission can be considerably abated.
One of these known systems comprises the manure produced in the stable being discharged to a settling silo or pit, the thin and the thick fraction of the manure after a certain settling time then being separated from one another, and the thin fraction then being used for flushing the stable clean, while the thick fraction goes to a storage silo and is stored for subsequent further processing. This method achieves a considerable abatement of the ammonia emission to the ambient air. As a result of separation of the manure, a much thinner thin fraction remains which can be evaporated in a simple and inexpensive manner, so that the total volume of manure can be reduced by approximately 50%. Previously, the thin fraction was spread as slurry over the farmland, which strongly promoted acidification.
The purpose of the invention is a stable in which facilities are provided by which the ammonia emission in the case of livestock being kept in the stable is reduced yet further, as well as a purpose for fitting these facilities.
The object of the invention is achieved by a stable provided with a pit in accordance with the type described in the preamble, in that the gutters are V-shaped, having their side walls making an angle with each other, such that the bottom surface of the gutter is narrowed with regard to the gutter's open top end, the res
REFERENCES:
patent: 428848 (1890-05-01), Logan
patent: 2868169 (1959-01-01), Schriever et al.
patent: 3848568 (1974-11-01), Hazen et al.
patent: 4520759 (1985-06-01), Deters
Wolbrink Jozef Willibrordus Maria
Wolters Johannus Stephanus Josephus
Jaskiewicz Edmund M.
Swiatek Robert P.
Wolters Holding B.V.
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