JP2006273983A - Method for solidifying livestock excrement and solid of livestock excrement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for solidifying livestock excrement to recycle to fuel or manure, wherein drying time is decreased to achieve cost reduction. <P>SOLUTION: The livestock excrement are solidified to molded products having a predetermined uniform particle diameter and obtained by a first dehydrating step for adding pulp refuse as a first auxiliary to separate solid from liquid while promoting dehydration, a second dehydrating step for adding and kneading pulp refuse as a second auxiliary to the wet solid part obtained by the first dehydration so as to obtain a dried livestock excrement and a molding step for molding the dried livestock excrement obtained by the second dehydration to be a predetermined grain form. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of livestock excreta solidifying method for dehydrating and solidifying livestock excreta discharged from livestock such as cattle, pigs and chickens, and solidification of livestock excreta.

  In recent years, the preservation of the global environment has been strongly screamed, and it is a common recognition that the production of products consumes that much energy and affects the deterioration of the global environment and global warming. For this reason, recycling is being studied, and research and development to make unnecessary materials useful is also actively conducted.

As part of this, recycling of excreta (feces and urine) discharged or excreted by livestock such as cattle, pigs, and chickens is one issue. By dehydrating livestock excreta and solidifying it, Attempts have been made to use solidified material as fuel or fertilizer.
As described above, as a method for solidifying livestock excrement, the livestock excrement is supplied to a drying drum, and the livestock excrement is dried by stirring the rotating force and blades provided in the drum (Patent Document 1). ), And a technique (Patent Document 2) that dries what has been added a waste material such as sawdust and rice husk has been proposed.
JP 2004-101109 A JP 2001-287995 A

  However, since the thing of patent document 1 is solidified only by drying livestock excrement, there is a problem that the drying time must be lengthened, the efficiency is low, and the cost is high. In Patent Document 2, although drying is promoted, there is a problem that it is difficult to be solidified (hard to be molded), and all of them need improvement, and there is a problem to be solved by the present invention. .

The present invention has been created in view of the above circumstances and has been created for the purpose of solving these problems. The invention of claim 1 is a solidification in which livestock excreta is solidified and recycled to fuel or fertilizer. A first dehydration step of solid-liquid separation while promoting dehydration by adding the first auxiliary to livestock excrement, and adding a second auxiliary to the wet solid portion obtained by the first dehydration, It comprises a second dehydration step of kneading and dewatering, and a molding step of shaping the second dehydrated livestock excrement into a predetermined grain shape, wherein the first and second auxiliary materials are pulp, pulp sheet defibration , Pulp cake, pulp cake pulverized material, waste paper, thinned wood pulverized material, etc., rice straw, coffee straw, hemp, hemp pulverized product, date palm, date coconut product, etc. Or a mixture of these. It is.
The invention of claim 2 is characterized in that, in claim 1, the first and second auxiliary materials are fibrillated or pulverized to form fibers.
According to a third aspect of the present invention, in any one of the first and second aspects, the liquid portion obtained by the first dehydration is purified and discharged to the outside.
According to a fourth aspect of the present invention, in the third aspect, the residue precipitate obtained by purifying the liquid portion is returned to the first dehydration step.
According to a fifth aspect of the present invention, in any one of the first, second, third, and fourth aspects, the forming step includes a pulverization step of pulverizing the dried livestock excrement, and the pulverized dry livestock excrement being predetermined. And a granular forming step of forming into a particle shape.
The invention of claim 6 includes a first dehydration step in which a first aid is added to livestock excrement to promote solid dehydration while promoting dehydration, and a second solid is added to the wet solid portion obtained by the first dehydration. A solidified product of livestock excrement formed by a second dehydration step of adding, kneading and dehydrating the material, and a molding step of forming the second dehydrated livestock excrement into a predetermined grain shape, The first and second auxiliary materials are pulp, pulp sheet defibrated material, pulp cake, pulp cake pulverized material, waste paper, materials having pulp components such as thinned wood pulverized product, rice straw, coffee cake, hemp, hemp crushed product, It is any one of fiber components such as date palm and date palm ground product, or a mixture thereof.
The invention of claim 7 is characterized in that, in any one of claims 1, 2, 3, 4, 5 or 6, the solidified product is a fuel or a fertilizer.

According to the invention of claim 1, the drying time can be shortened, the cost can be reduced, and the solid can be adjusted in particle size, and can be stored and transported easily. It becomes.
By setting it as invention of Claim 2, mixing to excretion becomes smooth, dehydration efficiency can be accelerated | stimulated, and the function as a connection at the time of solidifying can be fulfilled.
By making it invention of Claim 3, the recycle of livestock excrement can be achieved without polluting the environment.
By making it the invention of Claim 4, recycling of livestock excrement can be achieved without polluting the environment.
By setting it as invention of Claim 5, it can solidify in the shape where the particle shape was uniform and was prepared, and commercial value increases.
According to the invention of claim 6, the drying time can be shortened, the cost can be reduced, and the solid can be adjusted in particle size, and can be stored and transported easily. It becomes.
According to the invention of claim 7, not only can it be used effectively, but also when fertilizing as a fertilizer, not only mechanization is facilitated, but also quantitative supply becomes possible. In addition, when used as fuel, calorie can be improved.

Next, embodiments of the present invention will be described with reference to the drawings.
In the drawings, reference numeral 1 denotes a livestock excrement receiving facility, and the livestock excrement receiving facility 1 is provided with a first tank 1a for storing the livestock excrement (feces and urine) that has been introduced. It is set so that livestock excrement in a mud state in which feces and urine are mixed is brought into one tank 1a and stored. Reference numeral 2 denotes a first dehydration chamber for carrying out a first dehydration process of livestock excreta, and the livestock excrement is carried into the first dehydration chamber 2 from the first tank 1a and pulp is used as a first auxiliary material. A supply pit 2a into which dredging is introduced and a belt press type dehydrator 2b into which a mixture of the supply pit 2a is introduced are provided. In the first dehydration step, the pulp cake is added to the livestock excrement to increase the solid content and perform relative dehydration, and belt-press the mixture with the dehydrator 2b, thereby substantially dehydrating. And is set to be separated (solid-liquid separation) into a wet solid portion having a reduced moisture content (solidified portion in a cake state) and a liquid portion.
Here, the livestock excrement carried into the first tank 1a is the excrement of milking cows in the present embodiment, and mixed with straw, sawdust, chaff, etc. The water content is 85-75%. The first auxiliary material is added and mixed in an amount corresponding to 2 to 10% by weight with respect to the livestock excrement, and the livestock excrement (wet solid portion) obtained by dehydrating this with the dehydrator 2b. ) Has a water content of 70 to 65 percent.

The liquid portion separated from the wet solid portion by the dehydrator 2a is configured to be guided to an ultra deep aeration tank 3a which is a purification processing means 3 installed outside the first dehydration chamber 2. . The liquid portion was forcibly aerated and circulated in the ultra-deep aeration tank 3a, and purified by transferring the processed liquid portion to the staged storage tanks 3b, 3c, and 3d, respectively. It is set to obtain upper water. The obtained upper water is further purified by passing through a filtering device 4 made of porous ceramics and can be used as a fertilizer, even if the upper water is discharged to the outside. Even the environment is not polluted.
Moreover, in this Embodiment, the residue deposit collect | recovered by the filtration apparatus 4 by filtering upper water is set so that it may return to the 1st tank 1a of the livestock excrement acceptance facilities 1, Care is taken to ensure that waste associated with solidification of livestock excretion is not inadvertently discharged outside the facility.

  On the other hand, the wet solid portion separated by the dehydrator 2b is transferred to the second dehydration chamber 5 where the second dehydration step is performed. The second dehydration chamber 5 includes a second tank 5b provided with a horizontal stirrer 5a. The water content of the second tank 5b dehydrated in the first dehydration chamber 5 is about 70%. ˜65 percent wet solids and pulp lees as the second auxiliary agent corresponding to 2 to 10 weight percent of the wet solids are carried in, and the horizontal stirrer 5a is operated for 24 hours. Stir. At this time, by ensuring the air circulation in the second dehydration chamber 5, drying while stirring the livestock excrement is promoted, and thereby the moisture content of the livestock excrement (dry livestock excrement) is 35 to 30%. To drop.

Here, as the first and second auxiliary materials, both the pulp cocoons are used in the present embodiment. However, the auxiliary materials can accelerate drying and improve the calories of the mixture when dried. In addition to pulp koji, pulp, pulp sheet defibrated products, pulp kneaded materials, waste paper, thinned wood milled materials, etc., rice straw, coffee koji, hemp, hemp crushed products, dates In addition, a fibrous component such as a date palm pulverized product can be used, and any one of these or a mixture of several types can be used. Furthermore, the first and second auxiliary materials can be used separately. It is also possible to use the auxiliary material.
In addition, the material constituting the first and second auxiliary materials is defibrated or crushed to increase the surface area as a fine fiber, that is, a fluffy cotton state. By using the first and second auxiliary materials, the mixing with livestock excrement can be promoted and the effect of promoting dehydration efficiency can be obtained. It was confirmed that it can fulfill the function of “connection” in the case of solidifying into a shape. Therefore, in the present embodiment, pulp pulp is defibrated and used in a cotton shape.

  The dried livestock excrement dried to a moisture content of 35 to 30 percent thus obtained is transferred from the second dehydration chamber 5 to the pulverization chamber 6 for carrying out the pulverization process of the present invention. The crushing chamber 6 is set so that the transported dried livestock excrement is stored in the storage tank 6a in advance and then crushed (pulverized) by the uniaxial crusher 6b. By crushing, the particle size of the dried livestock excrement becomes 5-15 mm.

The pulverized dried livestock excrement is transferred to the granulation chamber 7 where the granular molding and fixation of the present invention is carried out, and the particle size is adjusted to 3 to 4 mm by introducing it into the pressure kneader 7a. . Then, the dried livestock excrement adjusted for particle size is loaded into the hopper 7c in a state where the particle size is further adjusted by the first sieve 7b, and is set to be input into the molding machine 7d via the hopper 7c. The dried livestock excrement is set to become a solidified product (solid molded product) formed into a predetermined shape by the molding machine 7d. The dried livestock excrement formed and discharged by the molding machine 7d is further adjusted in particle size via the second sieve 7e, and then transferred to the filling device 7f. It is set to fill excrement into a predetermined container.
Here, the molding machine 7d may be any one that molds dried livestock excrement into an appropriate shape such as a stamped mold, a macek type, and a plum dried mold, and can be appropriately selected according to the use situation. Incidentally, it has been confirmed that a molded product having a diameter of 5 to 50 mm and a length of 10 to 50 mm is suitable.

In the present embodiment configured as described, the livestock excrement is first dehydrated beforehand by adding a first auxiliary material and belt pressing, and further adding a second auxiliary material to this and stirring. It is configured to dry by two dehydration. For this reason, drying time can be shortened and cost reduction can be realized.
In addition, in this product, the dried livestock excrement is pulverized in advance by the pulverizer 6b, the particle size is adjusted by the kneading machine 7a, and the product is molded into a solid product having a predetermined particle shape by the molding machine 7d. Therefore, solidification is performed in a state where the grain shape is uniform and well-organized, and a fuel or fertilizer having high commercial value can be obtained. In particular, when used as a fuel, it is possible to obtain an excellent fuel with no combustion unevenness.
In addition, in this product, substances having pulp components such as pulp, pulp sheet defibrated product, pulp koji, pulp koji pulverized material, waste paper, thinned wood pulverized product, rice straw, coffee koji, hemp As one of the fiber components such as hemp pulverized product, date palm, date palm pulverized product, etc., or a mixture of these, the one with excellent dehydration performance and improved calorie is used. In addition, the drying time can be shortened and the calories of the dried livestock excrement can be increased, resulting in an excellent fuel. In addition, since these auxiliary materials can effectively use waste materials, they are excellent in recyclability.

  Moreover, in this product, the pulp koji used as the first and second auxiliary materials is selected and used as a fine fiber (cotton state), so the mixing with the livestock excrement is smooth and the dehydration efficiency is high. It can be promoted. In addition, since the fine fibers of the first and second auxiliary materials are solidified as a linkage of livestock excrement, the moldability in the granular molding process can be further improved, and the solid shape in a state where the grain shape is uniform and well-equipped. Can be a compound.

  In addition, in this device, the liquid portion obtained by the first dehydration is purified by the ultra-deep aeration tank 3 based on the ultra-deep aeration method, so that the purified liquid portion can be used as fertilizer. Not tentatively, it will not pollute the environment as it is discharged outside.

  Furthermore, in this thing, in purifying the liquid part obtained by the first dehydration, the residue precipitate obtained by filtering with the filtration device 4 is configured to return to the first dehydration step. Furthermore, it can be set as the solidification process in consideration of the environment.

  In addition, this product can be solidified into a uniform and well-shaped grain shape, thus increasing the commercial value.

  And when solidified material of livestock excreta is used as a fertilizer, it is easy to mechanize fertilization work because the shape of the grains is uniform and well-organized, and quantitative fertilizer It can be sprayed and the product value as a fertilizer can be further increased. Moreover, when the solidification thing of livestock excrement is used as a fuel, it can be used as an effective fuel by adding the 1st, 2nd auxiliary material which improves a calorie.

Of course, the present invention is not limited to the above embodiment, and the second to fourth embodiments will be described with reference to the table of FIG.
The second embodiment is a case where livestock excrement of fattening cattle is used. In this case, the water content of the original excrement is 70 to 65%, and excretion is performed as in the first embodiment. Items are mixed with straw, sawdust and rice husk. In this, in the first dehydration step, 2 to 5 weight percent of the first auxiliary material (pulp koji) of the excrement of fattening cattle is added to perform the first dehydration, and further in the second dehydration step, the wet solid A dry excrement having a moisture content of 35 to 30 percent was obtained by adding 2 to 5 weight percent of the second auxiliary material (pulp koji) and performing the second dehydration. In this case, the particle size is adjusted by passing through a pulverization step and a granular molding step, and a uniform solid molded product can be obtained.
Furthermore, in the third embodiment, solids are formed using the original excrement of pigs having a water content of 85 to 75%, and the original excrement is mixed with straw, sawdust, and rice husks. . In the first dehydration step, 3 to 10% by weight of the first auxiliary material (pulp koji) of pig excrement is added to perform the first dehydration, and in the second dehydration step, 3% of the wet solid portion is obtained. Dry excrement having a moisture content of 35 to 30 percent was obtained by adding 10 to 10 weight percent of the second auxiliary material (pulp koji) and performing the second dehydration. In this case, a solid molded product having a uniform particle shape and a uniform shape can be obtained through a pulverization step and a granular molding step.
Next, although 4th embodiment is described, in this thing, a solid is formed using the raw excrement of the chicken of the moisture content of 50 to 40 percent. In this case, straw, sawdust and rice husk are not mixed in the original excrement, and in the first dehydration step, 2 to 5% by weight of the first auxiliary material (pulp lees) of the chicken excrement is added. In the second dehydration step, the water content is 25 to 20 by adding 2 to 5% by weight of the second auxiliary material (pulp koji) and performing the second dehydration in the second dehydration step. Percent dry excreta was obtained. And in this case, when the second dehydration is performed, it has already been pulverized, and the granule forming step is omitted by omitting the pulverizing step, so that the particle shape is uniform and uniform. A solid molded product can be obtained.
In addition, straw, sawdust, rice husks, etc. may be mixed in chicken excrement. In this case, the solid is obtained by carrying out the pulverization step after the second dehydration step and then carrying out the granulation molding step. A molded product can be obtained.

It is a top view explaining the solidification process of livestock excrement. It is a side view explaining the solidification process of livestock excrement. It is a table | surface figure explaining 2nd, 3rd, 4th embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Livestock excrement acceptance facility 1a 1st tank 2 1st dehydration chamber 2b Dehydrator 3 Purification processing means 3a Super deep aeration tank 5 2nd dehydration chamber 6 Crushing chamber 7 Granular molding chamber

Claims (7)

  Solidification method of solidifying livestock excrement and recycling to fuel or fertilizer, first dehydration step of solid-liquid separation while promoting dehydration by adding first aid to livestock excretion, and the first dehydration A second auxiliary material added to the wet solid portion obtained by kneading, kneaded and dehydrated, and a molding step of molding the second dehydrated livestock excrement into a predetermined grain shape, The first and second auxiliary materials are pulp, pulp sheet defibrated material, pulp koji, pulp kneaded material, waste paper, materials with pulp components such as thinned wood milled product, rice straw, coffee koji, hemp, hemp milled product A method for solidifying livestock excreta, characterized in that it is any one of fibrous components such as date palm, date palm ground product, etc., or a mixture thereof.   2. The method for solidifying livestock excreta according to claim 1, wherein the first and second auxiliary materials are fibrillated and pulverized to form fibers.   3. The method for solidifying livestock excreta according to claim 1, wherein the liquid portion obtained by the first dehydration is purified and discharged to the outside.   4. The method for solidifying livestock excrement according to claim 3, wherein the residue precipitate obtained by purifying the liquid portion is returned to the first dehydration step.   5. The molding process according to claim 1, wherein the molding step includes a pulverization step of pulverizing the dried livestock excrement, and a granular molding for molding the pulverized dry livestock excrement into a predetermined grain shape. The solidification method of livestock excrement provided with the process.   A first dehydration step of adding a first auxiliary material to livestock excrement and promoting solid-liquid separation while promoting dehydration, and adding and kneading the second auxiliary substance to the wet solid portion obtained by the first dehydration A solidified product of livestock excrement formed by a second dehydration step of dehydrating and a molding step of forming the second dehydrated livestock excrement into a predetermined grain shape, wherein the first and second aids are Pulp, pulp sheet defibrated material, pulp cocoon, pulp pulverized material, waste paper, thinned wood pulverized material, etc., rice straw, coffee mash, hemp, hemp pulverized product, date palm Solidified product of livestock excreta characterized by being any one of fiber components or a mixture thereof.   The solidified product of livestock excrement and the solidified product of livestock excreta according to any one of claims 1, 2, 3, 4, 5 or 6, wherein the solidified product is fuel or fertilizer.

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