JPS6257699A - Treatment for dehydrating and deodorizing hydrous waste - Google Patents

Abstract

PURPOSE:To dehydrate hydrous waste such as cattle dung having offsensitve odor with substantially no odor and with less energy by adsorbing said waste to porous granular particles then grinding and/or drying the waste. CONSTITUTION:The hydrous waste such as cattle dung, poultry dung, night soil or sludge having the offsensive odor is adsorbed on the vegetable or mineral porous granular particles (e.g., wooden ash, coal shells) directly or after preliminary grinding and is then ground and/or dried. As a result, the above-mentioned hydrous waste is efficiently dehydrated while said waste is made odorless.

Description

[Detailed Description of the Invention] (Field of Application of the Invention) The present invention relates to the treatment of waste from livestock and poultry, activated sludge from urinary water treatment facilities, and waste materials such as sludge from paper manufacturing facilities. Relatively free of certain high moisture content BOD waste lγtLII
φk a4 crystal seven trigrams 1 Shijiru Iji: J* I
Concerning 1 cup and 1 bottle.

[Background of the invention]

In facilities where large numbers of poultry and livestock are used, such as poultry farms and livestock sheds, the disposal of manure and urine produced by these animals becomes a serious problem. These excreta have extremely high biological oxygen demand (BOD), have a foul odor, and are a source of sanitary pests such as flies.
This is not just a matter of environmental pollution, but also a major problem in terms of public health and epidemiology.

Similar problems arise with the treatment of high BOD activated sludge from microbiological wastewater treatment plants, sludge from paper mill effluents, or sludge from urban gutters.

The animal excreta, activated sludge, and dredged sludge mentioned above are useful as fertilizer ingredients because they contain a large amount of organic matter, and poultry droppings are particularly rich in phosphorous, but all of these contain large amounts of organic matter. Because it contains moisture, it is dry in the summer and requires a long period of time to dry under the sun in other seasons. Therefore, in order to shorten the drying period, it is necessary to use thermal energy such as heavy oil, but on the other hand, considering the price of these dried products or their commercial value, it is not profitable to spend expensive energy costs. There are many cases. In addition, there are some products such as activated sludge and sludge that are not marketable even if they are dried as they are.

[Purpose of the invention]

In view of the above-mentioned circumstances, from the viewpoint of resource saving and environmental improvement, the purpose of the present invention is to solve the problem of high moisture content, such as the above-mentioned livestock manure or activated sludge from organic wastewater treatment facilities, or sludge from paper mill wastewater. The object of the present invention is to provide an economical dehydration and deodorization treatment method that can dehydrate BOD waste almost odorlessly and in an energy-saving manner.

[Means to achieve the purpose]

After being adsorbed onto mineral porous powder, the →Kukan-eup method is applied.

Examples of the vegetable porous powder used in the treatment method of the present invention include smoky charcoal, wood ash, charcoal, grass-root wood ash, grass-root charcoal, and the like. These powders have a water absorption rate of 5,800g to 6,800g, which is approximately 19 times more than the water absorption rate of normal field soil, which is 350g/kg.
Since it has a water absorption rate of /kg, it can be said to be a preferable treatment material for the purpose of the present invention. In particular, smoked charcoal is an inexpensive resource obtained by carbonizing rice husks, which are produced in the hundreds of tons per year across Japan, but most of it is incinerated.
It is the most preferred material.

Mineral porous powders such as coal shells, coke shells, ore slags also have a water absorption rate of 1.500 g/kg or more, and are therefore the second most useful treatment materials after the aforementioned vegetable porous powders.

[For production]

When an appropriate amount of the above-mentioned porous powder is mixed with high BOD water-containing waste such as livestock manure, poultry manure, activated sludge, or sludge, the latter adsorbs most of the water and bad odor contained in the former. The consumption of energy resources such as heavy oil used to heat and dry water-containing waste can be significantly reduced, and the strong odor generated during drying can be significantly reduced. Since it is easy to get into the space between the water-containing waste and the sediment, aerobic bacteria grow actively, further promoting deodorization.

Furthermore, according to the method of the present invention, even if heating is omitted at all, the temperature of the deposit reaches 60 to 70°C due to fermentation, so by utilizing this fermentation heat, conventional heating using heavy oil etc. It is also possible to omit the means altogether.

In this case, the deposits are transparent, such as vinyl houses, etc.
Drying in a photothermal oven Examples for embodying the present invention will be described below, but the examples are for illustrative purposes only and do not limit the spirit of the invention.

FIG. 1 is a schematic diagram of a chicken manure dehydrating and deodorizing blunt that is compatible with the present invention.

This example plant includes a smoldering charcoal supply device (1) equipped with a hopper (1a) capable of storing 5001 smoldering charcoal and a screw set conveying unit (1b) capable of supplying 25 kg/Hr of smoldering charcoal,
A chicken manure storage hopper (with the same capacity as the supply device (1))
2a) and a chicken manure supply device (2) comprising a Neag complete conveyor unit (2b) capable of supplying 125 kg/Hr of chicken manure;
A crushing device (3) that stirs the smoky charcoal and chicken manure supplied from the smoky charcoal supply device (1) and the chicken manure supply device (2) to form a mixture of small nodules, and spreads the mixture on the ground. In addition to the fermentation heat generated from the mixture (60
In practice, the smoky charcoal supply device (1) and the poultry manure supply device (2) include as main components a drying room (4) consisting of a vinyl house in which the mixture is dried using temperatures (~70°C).
The smoky charcoal and chicken manure, which are supplied at a ratio of 1:5, are mixed in a mixing tray (
5) The mixture (M) placed in the tray (5) is preliminarily stirred by a worker using a shovel or the like. Note that if an appropriate mixer is used instead of this manual mixing work, the work can be done more efficiently.

For the crushing device (3) of this example, the mixing tray (5
) for unloading the mixture (M) to the device (3), and the pulverized mixture (M゛) discharged from the device (3) to the drying room (4). A second conveyor belt (7) is attached. The pulverized mixture (M) conveyed to the drying chamber (4) by the second conveyor belt (7) is spread onto the ground of the drying chamber (4) to an approximately even thickness by a scraper (not shown) or a worker. It can be spread evenly. and the mixture (M')
is heated by the fermentation heat generated by itself, and about 1
After 0 hours, it is dried to about 85% of the initial moisture content. Further, in this case, the smoky charcoal in the mixture (M'') adsorbs the odor emitted from the chicken manure, thereby suppressing the release of bad odor into the surrounding atmosphere.

Mixed Qf that has become almost dry due to the above operations
f (M') is transported by a third conveyor belt (8) to a product collection area, where it is weighed by a weighing device (9) and stored in a package aΦ.

The smoky charcoal-containing chicken manure produced in this example plant as described above has useful fertilizer components contained in the chicken manure that are effective for field crops, fruit trees, and vegetables, and the porous smoky charcoal Since it promotes the effect of supplying sufficient oxygen to the roots of the plants, it greatly contributes to the growth of the crops.

The above explanation was detailed in relation to the processing of chicken manure, but
The present invention can be effectively applied to the treatment of manure from other livestock such as pigs and cows, as well as the treatment of water-containing wastes such as activated sludge from organic wastewater treatment facilities mentioned at the beginning or sludge from paper mill wastewater. It can also be suitably used for.

〔Effect of the invention〕

As described in detail above, the present invention is applicable to water-containing waste such as manure excreted by poultry and livestock such as chickens, pigs, and cows, activated sludge generated in large quantities at organic wastewater treatment facilities, and sludge from paper factory wastewater. By providing an economical dehydration and odor treatment method that can effectively dehydrate substances while rendering them almost odorless,
This will greatly contribute to improving water-containing waste treatment methods and reducing environmental pollution.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a poultry manure dehydration and deodorization plant to which the present invention is applied. In the diagram, the meanings of the symbols are as follows: □ 1: Smoked charcoal supply device, 1a: 1 hopper, 1b: 1 conveyance section, 2: Chicken manure supply device, 2a: 2 hopper, 2b: 2 conveyance section , 3: Grinding device, 4: Drying room, 5: Mixing tray, 6: First belt conveyor, 7: Second belt conveyor, 8: Third belt conveyor, 9: Weighing device, 10: Packaging; M, M ' :blend.

Claims (4)

[Claims] (1) Foul-smelling water-containing waste such as livestock manure, poultry manure, manure and urine sludge, as is or after being crushed in advance, adsorbed onto vegetable or mineral porous powder, and then crushed and/or dried if necessary. A method for dehydrating and deodorizing water-containing waste. (2) The treatment method according to claim 1, wherein the porous vegetable powder is a charcoal vegetable char or ash. (3) The treatment method according to claim 1, wherein the mineral porous negative powder is coal shell, coke shell, or slag. (4) The processing method according to claim 1, wherein the drying is performed using fermentation heat.