JPH04278036A - Method for deodorizing interior of poultry house - Google Patents

Abstract

PURPOSE:To provide a method for deodorizing the interior of a poultry house in which malodor caused by poultry manure in the poultry house can readily be reduced. CONSTITUTION:Granular coal ash is scattered under a rearing floor surface 11 of a poultry house 10 and excreta dropped from the rearing floor surface 11 are brought into contact with the aforementioned coal ash to absorb a large amount of water in fresh excreta just after dropping. Emission of malodor is reduced by absorption of moisture in the excreta. The granular coal ash, as necessary, is further scattered on the excreta deposited on the coal ash. Thereby, the excreta are redeposited on the new coal ash and the above- mentioned operation can be repeated. The granular coal ash can be prepared by adding a vegetable oil or other flocculating additives to, e.g. fly ash, mixing and stirring the resultant mixture, flocculating and granulating the obtained mixture.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deodorizing a poultry house for reducing the odor caused by chicken manure in a poultry house at a poultry farm.

0002

BACKGROUND ART As shown in Figure 2, the intensity of the odor emitted from chicken manure is almost linearly proportional to the water content, and the more water there is, the more unpleasant the odor is. Therefore, reducing the odor caused by chicken manure depends on how quickly the moisture in the chicken manure can be removed.

[0003] Therefore, in windowless poultry houses, manure is removed every day using conveyor equipment such as various conveyors and scrapers, and dried separately, or when poop is deposited under the cage, air is blown by a cage fan to accelerate drying. Slats, feces catch plates, etc. have been installed.

0004

However, these conventional methods have the following problems. ■Transportation equipment for fecal removal must be installed in the poultry house. ■If you want to remove manure every day, you will need a large poultry manure treatment facility. ■Slats, feces receiving plates, etc. require installation work, removal work when removing feces, and cleaning work. ■When blowing air, energy consumption (power cost) is large. ■During the hot and humid climate during the rainy season, chickens excrete watery, loose stools due to increased water drinking, so conventional techniques cannot fully remove or dry feces, and this also causes problems such as the active activity of putrefactive microorganisms. As time goes by, the foul odor from the chicken house takes on a strong, unpleasant odor of putrefaction. ■In most poultry houses, there are insufficient measures to prevent feces and moisture, and feces are allowed to accumulate under the cages for 1 to 4 weeks, and in some cases for several months. A foul odor is occurring.

By the way, according to Japanese Patent Application Laid-Open No. 61-192233, a chicken manure fermentation tank is constructed by laying a layer of sawdust under a lattice-shaped rearing floor surface, and a feeding truck and a mechanism for stirring the sawdust layer are constructed. A poultry house is disclosed that is equipped with a water sprinkler that moistens the area directly below the rearing surface.

[0006] However, in this poultry house, since the chicken manure is fermented together with sawdust in the poultry house to produce compost, countermeasures against bad odors are not necessarily sufficient. In particular, sawdust requires a long period of time to ferment and decompose, and must be kept moist by sprinkling water on it, so it is not free from a long-term putrid odor.

Furthermore, Japanese Patent Application Laid-open No. 62-283891 discloses that after coating nitrogen-containing organic matter such as livestock dung with a moisture regulating material such as clinker ash (coal ash) and coating the surface with an adsorbent such as zeolite, , a method for producing compost by fermentation and ripening is disclosed.

[0008] In this production method, clinker ash is used as a moisture regulating material, but this clinker ash is mixed with nitrogen-containing organic matter and coated, and cannot be used to directly deodorize inside the poultry house. .

[0009] Further, in Japanese Patent Application Laid-Open Nos. 63-185881 and 2-107584, etc., compost and snow melting fertilizer are produced by adding coal ash (fly ash) etc. to nitrogen-containing organic matter such as chicken manure. A method is disclosed.

[0010] However, these methods are also
Similar to the manufacturing method of Publication No.-283891, this method does not allow direct deodorization within the poultry house. Moreover, if fly ash is directly mixed with chicken manure, etc., it will generate a lot of dust, which will have a negative impact on workers and chickens, so dust prevention measures must be taken into consideration.

[0011] An object of the present invention is to provide a method for deodorizing a poultry house that can easily reduce bad odors in the poultry house caused by chicken manure.

0012

[Means for Solving the Problems] The present invention involves scattering granular coal ash below the rearing floor installed in a poultry house, allowing chicken manure falling from the rearing floor to come into contact with the coal ash and causing it to fall. This is a method for deodorizing a poultry house, which is characterized by absorbing a large amount of moisture in fresh feces immediately after use.

[0013] In the present invention, the process of again scattering granular coal ash on the chicken manure deposited on the coal ash and dropping fresh manure again on the new coal ash may be repeated a predetermined number of times.

In the present invention, granular coal ash may be prepared by adding a cohesive additive to fly ash, mixing, stirring, coagulating, and granulating the mixture.

[0015]

[Operation] Chicken manure that falls onto granular coal ash immediately absorbs a large amount of moisture into the coal ash, resulting in a decrease in the moisture content of the fresh manure and the generation of bad odors. Since the coal ash is granular, no dust is generated when the granular coal ash is sprinkled below the rearing surface or when chicken manure falls. Because coal ash is inorganic, it does not decompose like sawdust, and it also has a high water absorption capacity, so it can maintain its deodorizing ability for a long time.

[0016] The coal ash on which a predetermined amount of chicken manure has been deposited is taken out of the chicken house and used as fertilizer or the like. If chicken manure needs to be deposited for a long period of time, it is best to sprinkle fresh granular coal ash on top of the chicken manure approximately every 1 to 2 weeks.

[0017]

[Embodiment] An embodiment of the present invention will be described below. Figure-1
The following shows the floor plan of the experimental poultry house and the gas sampling location for odor measurement.

The experimental poultry house 10 is provided with breeding beds 11, 11 formed in a lattice shape, mesh shape, etc. on both sides along the longitudinal direction. Between these two rearing surfaces 11, 11,
A passage 12 is provided. Granular coal ash as a moisture control material for dehydration is sprinkled to a thickness of about 5 cm below the breeding beds 11, 11 within a distance L1 = 25 m from the entrance 12A of the passageway 12, that is, in the shaded area in the figure. has been done.

[0019] For the coal ash, fly ash generated from a pulverized coal boiler is used, and rapeseed oil is added as a cohesive additive.
% by weight was added, and mixed and stirred for 2 minutes using a high-speed mixer manufactured by Taiheiyo Kiko Co., Ltd. to agglomerate and granulate. The mechanism of granulation is that rapeseed oil adheres to the individual surfaces of the fly ash during mixing and stirring, and the fly ash is repeatedly aggregated and granulated using this rapeseed oil as a medium. This granular coal ash, which has been agglomerated and granulated, looks powdery at first glance, but because it has cohesive properties, it does not generate dust even when chicken manure falls. The size of coal ash was 10 to 20 μm in the fly ash state before agglomeration and granulation treatment, but 0.0 μm after treatment.
It is 1 to several mm.

[0020] Gas sampling is performed at a distance L2 = 1 from the passage entrance 12A and the boundary between the sprayed area and the non-sprayed area.
At the 0 m position, testing was carried out in (A) coal ash spreading area, (B) coal ash spreading area path, (C) coal ash non-spreading area, and (D) coal ash non-spreading area path.

Table 1 shows the results of the odor concentration of the sampled gas determined from the dilution ratio through a sensory test using a three-point comparison odor bag analysis method.

[0022]

[Table 1]

According to this embodiment, as can be seen from Table 1, the following effects are achieved. (1) The odor concentration was definitely lower in the sprayed area than in the non-sprayed area, and a significant difference was observed, indicating that spraying has a deodorizing effect. (2) In the passageway 12 that poultry farmers pass many times a day for feeding and collecting eggs, regardless of whether it is a sprayed area or a non-sprayed area,
The odor concentration is lower than that under the breeding beds 11, 11 in the non-sprayed area, but between the aisles 12, it tends to be lower in the sprayed area than in the non-sprayed area. Therefore, the passage 12 also has a deodorizing effect through spraying. (3) In the sprayed area, the odor concentration reduction effect was observed even 10 days after the final sampling, confirming that it is sustainable. (4) After removing feces after the test, there was no feces left on the floor in the sprayed area, and feces could be easily removed. On the other hand, in the non-sprayed areas, feces remained on the floor, making it difficult to remove them. In addition, when removing manure, in the unsprayed area, the soft feces at the bottom were exposed, resulting in a foul odor, but in the sprayed area, the moisture in the feces was removed to the bottom, and no soft feces could be seen, so no foul odor could be felt. Ta. (5) Coal ash used for deodorization is a simple process of mixing fly ash, which is generated in large quantities from coal-fired power plants, with a cohesive additive, so it can be used to remove ash from sawdust, rice husk, etc. Unlike materials that are difficult to obtain in recent years, it can be obtained at a low price and can be used for inexpensive deodorizing treatment. Also, today,
It can also contribute to the protection of resources and the preservation of the global environment, which are urgently needed on a global scale. (6) The coal ash used is in the form of granules made of cohesive additives such as rapeseed oil, so there is no dust generation inside the poultry house.
Does not cause environmental deterioration. Moreover, since rapeseed oil is used for flocculation, the granular coal ash of this example can have a greater ability to dehydrate chicken manure than when flocculating with 15 to 20% water by weight of coal ash. (7) Fly ash was certified as a special fertilizer by the Ministry of Agriculture, Forestry and Forestry in 1960, and chicken manure added with this fly ash can further enhance the fertilizer effect. (8) It also has the effect of improving the working environment when dealing with moisture-rich chicken manure (soft stool) from May to October. That is, in the non-sprayed area, the passage 12 becomes muddy underfoot due to moisture separated from the chicken manure, but this phenomenon is not observed in the sprayed area.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and any improvements, modifications, etc. that can achieve the object of the present invention are included in the present invention.

For example, in the above embodiments, rapeseed oil was used as the flocculating additive, but the flocculating additives may include vegetable oils such as soybean oil, coconut oil, corn oil, fish oil, tallow, etc. Oil-based materials made of mineral oils such as animal oils or heavy oils, or water-soluble materials made of water-soluble waste materials such as lignin and molasses can be used.

[0026] Furthermore, the proportion of the cohesive additive to be mixed with the coal ash is in the range of 0.5 to 6 parts by weight per 100 parts by weight of coal ash to satisfy the granulation properties and dispersibility of the product. The above is appropriate.

Furthermore, granular coal ash is not limited to that produced by agglomerating fly ash, but also granular coal ash that is pre-formed into granules such as bottom ash or clinker ash.
Alternatively, ash adhering to the wall may be aggregated into granules.

Furthermore, in the present invention, granular does not mean only granular and completely hardened particles, but also refers to particles having a somewhat larger volume than fine powder such as fly ash. Therefore, it includes clay-like buns or clay-like soft ones that retain their shape to some extent in their natural state, and may also be lump-like.

Furthermore, the granular coal ash can be spread manually, or by using an appropriate spreading device, for example, a hopper having an internal screw feeder and an opening at the bottom, and distributing the hopper along the length of the chicken house. It may be performed automatically by a device or the like that moves along the direction.

[0030]

[Effects of the Invention] As described above, according to the present invention, the moisture in chicken manure is quickly absorbed by the granular coal ash sprinkled below the rearing floor surface, so it is possible to reduce the occurrence of bad odors in the chicken house and to improve deodorization. can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a sketch of a poultry house in one embodiment of the present invention.

FIG. 2 is a diagram showing moisture in chicken manure and discomfort level.

[Explanation of symbols]

10 Experimental chicken house 11 Breeding floor surface 12 Passage

Claims (3)

[Claims] [Claim 1] Granular coal ash is sprinkled below the rearing floor installed in the chicken house, and chicken manure that falls from the rearing floor is brought into contact with the coal ash to remove a large amount of fresh manure immediately after it falls. A method for deodorizing inside a poultry house, which is characterized by absorbing moisture. 2. In the method for deodorizing a poultry house according to claim 1, the step of again scattering granular coal ash on the chicken manure deposited on the coal ash and dropping fresh manure on the new coal ash is repeated a predetermined number of times. A method for deodorizing inside a poultry house, which is characterized by repeated steps. 3. In the method for deodorizing a poultry house according to claim 1 or 2, the granular coal ash is prepared by adding a cohesive additive to fly ash, mixing, stirring, coagulating, and granulating it. A distinctive method of deodorizing inside the poultry house.