JPH11275984A - Sheet for preventing weed from growing and sheet for growing grass or tree but preventing weed from growing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sheet capable of preventing weeds from growing and capable of providing a new method for recycling a plurality of specific wastes by compounding the wastes. SOLUTION: This sheet contains waste paper and fly ash. Therein, the fly ash is preferably contained in an amount of 1-10 pts.wt. per pt.wt. of the waste paper, and the sheet preferably contains water in an amount of <=10 wt.% based on the weight of the sheet. Fertilizers and/or grass or tree seeds in addition to the waste paper and the fly ash can be contained to produce a sheet for growing the grass and/or the tree but preventing weeds from growing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the use of waste paper and fly ash, which are wastes that are required to be reused. Regarding the sheet.

[0002]

2. Description of the Related Art Used paper (old newspaper, old magazine, old cardboard,
Used books, used copy paper, etc.) have conventionally been recycled into toilet paper, tissues, paper towels, cardboard, etc. However, there are limitations in manufacturing methods and prices for repeatedly using waste paper as papermaking raw material (for example, If the same technology is used to produce the same whiteness paper from recycled paper, the price will be higher than that of pulp.) A large amount of waste paper has flowed into the market from such as,
Supply has greatly exceeded demand, as municipalities are eager to recycle used paper. On the other hand, incineration of waste paper increases carbon dioxide emissions and is subject to laws and regulations due to dioxin contamination. Therefore, various new uses of waste paper have been studied, for example, activated carbonization, concrete formwork and floor / wall base materials,
It has been proposed to use asphalt pavement material. Fly ash, which is residual ash from thermal power plants, generates 8 million tons of ash annually in Japan, and about 4 million tons are used for cement expansion materials, building materials, fertilizers, etc., but the remaining 4 million tons are dumped at sea Have been.

[0003]

SUMMARY OF THE INVENTION The present invention provides a new method of recycling waste paper and fly ash which is different from the above. A sheet for weed prevention or vegetation growth comprising waste paper and fly ash as constituents is provided. An object of the present invention is to provide a sheet for preventing weeds.

[0004]

An object of the present invention is to provide a sheet for preventing weeds containing waste paper and fly ash, or containing waste paper and fly ash, further comprising a fertilizer and / or a fly ash.
Alternatively, the problem was solved by a plant growth and weed prevention sheet containing grass or tree seeds.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
Used paper used in the present invention includes used newspapers, used magazines (e.g., weekly magazines, comic magazines, and monthly magazines used), used cardboard, used books, used copy paper, and the like. Used paper used in the present invention further includes paper waste in the printing and bookbinding industries, and paper or cellulose-containing sludge in the paper and pulp manufacturing industries.

[0006] The fly ash used in the present invention includes ash generated when burning coal or oil in a boiler or the like for thermal power generation or for heating a building or the like. Ash generated when coal or oil is burned for power generation at power plants, especially fine ash in flue gas, and in a narrower sense JIS A6201
(1958).
According to JIS A 6201, fly ash is fine ash particles collected by a dust collector from a pulverized coal combustion boiler, silica is 45% or more, moisture content is 1% or less, ignition loss 5%.
Hereinafter, it is specified that the specific surface area is 2700 cm / g or more, the specific gravity is 1.95 or more, and 75% or more passes through a 44μ standard sieve. The fly ash used in the present invention may be any of the above, but the narrower the definition, the more preferable.

[0007] The fertilizer used in the present invention is not particularly limited.
Includes any commercially available fertilizer. That is, if it is a substance to be applied to the soil to provide nutrients to the plant, the components (nitrogen fertilizer, phosphate fertilizer, potassium fertilizer, compound fertilizer, etc.),
Chemical properties (acidic, neutral or alkaline fertilizers, inorganic or organic fertilizers, water-soluble or poorly water-soluble fertilizers, concentrated fertilizers, etc.), fertilizer application time (basic fertilizer, top-fertilizer, etc.), fertilizer speed (fast-acting or slow-acting fertilizers), etc. Regardless. The fertilizer used in the present invention further includes compost and humus produced from garbage, fallen leaves, activated sludge generated from a sewage treatment plant, and the like. The species of grass or tree used in the present invention is not particularly limited, and for example, seeds such as vegetables, flowers, turfgrass, flowering trees, trees for plantation, and foliage plants can be used. The water used in the present invention is not particularly limited, and tap water, groundwater, water from rivers and lakes can be used, and soft water and hard water are not limited.

Next, the present invention will be described by dividing it into a sheet for weed prevention and a sheet for plant growth and weed prevention. Regarding the use ratio of each component in the weed prevention sheet of the present invention, the weed prevention sheet of the present invention contains 1 to 10 parts by weight of fly ash with respect to 1 part by weight of waste paper, and the water content is based on the weight of the sheet. It is preferably 10% by weight or less, and 5 to 10 parts by weight of fly ash is contained with respect to 1 part by weight of waste paper, and the water content is 10% by weight or less, particularly 6% by weight of the sheet weight.
It is more preferred that: If the ratio of fly ash to 1 part by weight of waste paper is less than 1 part by weight, water retention and light-shielding properties may be insufficient. If it exceeds 10 parts by weight, handling may be difficult due to insufficient strength. The water content in the weed prevention sheet is 1% of the sheet weight.
If it exceeds 0% by weight, handling may be difficult due to insufficient strength.

The method for producing the sheet for preventing weeds of the present invention is not particularly limited. Usually, waste paper, fly ash and water are mixed, dewatered if necessary, formed into a sheet, and then dried to obtain a sheet. be able to. The amount of each component used may be such that the dry matter has the above-described component ratio, but it is better to use a relatively large amount of water in consideration of mixing efficiency and easiness. For example, 1 to 5 parts by weight of waste paper, 5 to 10 parts by weight of fly ash, and 10 to 90 parts by weight of water are mixed. Prior to mixing, the waste paper is generally free of foreign matter (eg, metal such as stapler needles in magazines and the like), and
It is preferable to cut to a width of not more than 2 cm, especially not more than 2 cm. The narrower the cutting width, the better the mixing efficiency.
The order of mixing the components is not particularly limited, and all the components may be mixed at once, or fly ash may be added after mixing waste paper and water to form a slurry. Mixing is usually performed by simple mixing or kneading. The machine used for mixing is not particularly limited, and a mixer (Henschel mixer, kneader, etc.), a roll mill, or the like can be used. Mixing is preferably performed until the mixture becomes as homogeneous as possible, but it is not necessary that the mixture be strictly homogeneous, and homogeneous mixing is not an essential requirement for obtaining the sheet for preventing weeds of the present invention.

After mixing, the mixture is formed into a sheet. The thickness of the sheet is preferably 0.1 to 1 cm as a thickness after drying. When the thickness of the sheet is less than 0.1 cm, the sheet is easily cut during transportation and use, and weeds under the applied ground may break through the sheet and grow. Further, even if the thickness of the sheet exceeds 1 cm, there is no problem in effectiveness, but the production / transportation cost is increased and it is uneconomical. There is no limitation on the shape and size of the sheet, and the sheet can have any shape and size according to demand. The drying temperature and the drying method are not particularly limited. For example, the drying can be performed in a temperature range from room temperature to 200 ° C. by blast drying, heating drying, natural drying, and the like.

The weed prevention sheet of the present invention can prevent the generation and growth of weeds at the location by laying it on land. Before laying the weed prevention sheet of the present invention on land, weeds that have already grown are removed if necessary. The removal of the weeds may be performed only on the ground surface, and the ones with short heights may not necessarily be removed. A representative example of land that can be applied is a fallow field. By using this sheet, fallow can be fallowed without damaging the fields with herbicides or the like. When cultivation is resumed, it is possible to remove this sheet, but it is usually sufficient to plow it into the field. The weed prevention sheet of the present invention can also be used for weeds such as parks, weeds for plantations, weeds for road shoulders and the like.

Next, regarding the usage ratio of each component in the plant growth and weed prevention sheet of the present invention, when the plant growth and weed prevention sheet of the present invention contains fertilizer, waste paper 1
1 to 10 parts by weight of fly ash and 0 to 20 parts by weight of fertilizer are contained, and the water content is preferably 10% by weight or less of the sheet weight, and 1 part by weight of waste paper. On the other hand, it is more preferable that it contains 5 to 10 parts by weight of fly ash and 1 to 5 parts by weight of fertilizer, and the content of water is 10% by weight or less, particularly 6% by weight or less of the sheet weight. If the ratio of fly ash to 1 part by weight of waste paper is less than 1 part by weight, water retention and light-shielding properties may be insufficient. If it exceeds 10 parts by weight, handling may be difficult due to insufficient strength. If the ratio of fertilizer to 1 weight of waste paper exceeds 20 parts by weight, handling may be difficult due to insufficient strength. From the viewpoint of growing plants, the ratio of fertilizer to 1 part by weight of waste paper is preferably 1 part by weight or more. On the other hand, if the water content in the plant growth and weed prevention sheet exceeds 10% by weight of the sheet weight, the strength may be insufficient and handling may be difficult. When the plant growth and weed prevention sheet of the present invention contains grass or tree seeds, the amount of such seeds used is not particularly limited. Generally, the degree of seeding is similar to that of seeding on ordinary soil (for example, 2
３30%) A larger amount is suitable, but the present invention is not limited to this. In this case, the amounts of other components used may be the same as described above.

The method for producing the sheet for plant growth and weed prevention of the present invention is not particularly limited, but usually, waste paper, fly ash, fertilizer and / or grass or tree seeds, and water are mixed, and if necessary, After dehydration, it can be formed into a sheet and then dried. After the above-described drying is performed, the sheet may be formed into a sheet. The amount of each component used may be such that the dry matter has the above-described component ratio, but it is better to use a relatively large amount of water in consideration of mixing efficiency and easiness. For example, 1 to 5 parts by weight of waste paper, 5 to 10 parts by weight of fly ash, more than 0 to 20 parts by weight of fertilizer and / or an appropriate amount of grass or tree seeds,
And 10 to 90 parts by weight of water. Prior to mixing,
The used paper is preferably cut to a width of usually 5 cm or less, particularly 2 cm or less, excluding foreign matters (for example, metal such as stapler needles of magazines and the like). The narrower the cutting width, the better the mixing efficiency. There is also no particular limitation on the mixing order of each component, and all components may be mixed at once. For example, after mixing waste paper and water to form a slurry, fly ash, fertilizer, and / or grass or tree seeds May be added. Mixing is usually performed by simple mixing or kneading. There is no particular limitation on the machine used for mixing,
A mixer (Henschel mixer, kneader, or the like), a roll mill, or the like can be used. Mixing is preferably performed until substantially homogeneous, but it is not necessary that the mixture be strictly homogeneous, and homogeneous mixing is not an essential requirement for obtaining the sheet for growing and preventing weeds of the present invention.

After mixing, the mixture is formed into a sheet. The thickness of the sheet depends on the nature of the land applied. That is, for land with sufficient soil, the thickness after drying is 0.1 to 1
cm. Sheet thickness is 0.1cm
If it is less than the above range, the sheet may be easily cut during transportation and use, and weeds under the applied ground may break through the sheet and grow. On the other hand, if the thickness of the sheet exceeds 1 cm, manufacturing and transportation costs are increased, which is uneconomical. If the land to be applied is a land without sufficient soil, for example, a land with a large proportion of sand, stone, rock, etc. (eg, 50% or more) such as a sandy land, a land mixed with stones and rocks, etc. The thickness is preferably 0.5 to 5 cm, particularly preferably 0.5 to 3 cm. In this case, the sheet assists seed implantation, germination, growth and seedling (tree) growth through water retention, nutrient supply, and the like. It also serves as a pipe connecting the soil of the land. In addition, when the sheet is thick, the germination efficiency can be increased by performing an operation such as increasing the seeds near the surface of the sheet.

The shape and size of the sheet are not limited at all, and can be any shape and size according to demand. The drying temperature and the drying method are not particularly limited. For example, the drying can be performed in a temperature range from room temperature to 200 ° C. by blast drying, heating drying, natural drying, and the like. The drying temperature is 40 ° C when grass or tree seeds are incorporated.
It is preferred that:

The sheet for growing plants and preventing weeds of the present invention is laid on land where grass or trees are to be grown.
Before laying the plant growth and weed prevention sheet of the present invention on land, weeds that have already grown are removed as necessary. The removal of the weeds may be performed only on the ground surface, and the short ones may not be removed. If the sheet contains fertilizer but does not contain plant seeds, a suitable amount of grass or tree seed to be grown is sown on the sheet. Normally, at least some of the germinated seeds break through the sheet and settle on the ground. The amount of seeds to be sown is not generally discussed, as the growth rate may vary depending on the thickness of the sheet, the surrounding environment (rainy or light, temperature, etc.), the type of seeds, etc. Usually, about 1-2 times the seeding amount is appropriate. The sheet can also be used for fertilization and weeding of already cultivated vegetated land, such as plantations that have already been cultivated, without sowing vegetation seeds thereon.

If the sheet contains plant seeds but no fertilizer, it is usually fertilized appropriately on the sheet. This fertilization is normal (= without sheet)
It can be done in the same way as fertilization. Seed germination is generally as good as normal, both when seeded on the sheet and when the sheet contains plant seeds, but the percentage of strains that grow after germination (= root on the ground) It is generally better when the sheet contains plant seeds than when sowing on the sheet. When the sheet contains both plant seeds and fertilizer, it is only necessary to carry out normal growth management. In any case, the growth of the target vegetation can be promoted with substantially no weed symbiosis, or at least with an overwhelmingly small weed symbiosis as compared with a case where seeds are directly sown on land. .

When the plant growth and weed prevention sheet of the present invention contains at least one of fertilizer and plant seeds, the land on which grass or trees are to be grown is not particularly limited. Deserts and wastelands to be repaired, divots for golf courses to be repaired, land to be flower roads, land to plant trees,
Nursery, home garden and the like. Further, the plant growth and weed prevention sheet of the present invention contains fertilizer but does not contain plant seeds, and does not sow plant seeds on the sheet after application to land. In this case, the land on which grass or trees are to be grown is not particularly limited. For example, as described above, plantations that have already been grown, median strips of roads that have grown plants, and tree-lined areas of roads And the like, which can be used for fertilizing and weeding the land.

In the case of application to land with extremely little water such as a desert, in addition to the above-mentioned application, the sheet for plant growth and weed prevention of the present invention (however, it does not contain seeds and does not necessarily contain fertilizer) May be formed into a hollow cylindrical shape, and this may be erected on land as a cylindrical column, and the top of the cylindrical column may be buried with the same level as the surface of the land. In this case, soil can be put in the hollow part of the cylinder, fertilizer can be put in if necessary, seeds can be sown, or seedlings (trees) can be planted.
The height of the cylinder depends on the nature of the land, for example,
About 1 m is appropriate.

[0020]

Next, the present invention will be described in detail with reference to examples. Example 1 Preparation of Weed Prevention Sheet and Weed Prevention Test 10 parts by weight of an old magazine excluding foreign matter such as stapler needles was used.
It was cut into a width of 2 cm, put into a mixer, 500 parts by weight of water was added, and the old magazine was slurried by high-speed rotation of the blade. Then fly ash (made by Joban Thermal Power Co., Ltd.)
50 parts by weight were added and stirred. The resulting slurry was dehydrated with a stainless steel wire mesh, formed into a sheet, and then heated to 110 ° C.
Dry with hot air, then cut to 12cm long, 15c wide
m, a sheet for preventing weeds having a thickness of about 0.2 cm. The water content of these sheets was about 3% by weight. We selected land under very common natural conditions and performed weeding (manual weeding completely removed the above-ground parts of the grass, but leaves some grass roots etc.). A rectangular section as shown in FIG. 1 (the size of each section was 12 cm long and 15 cm wide) was provided on this land. 1 to No. Numbered up to 15. No. 1, No. 8 and No. The above weed prevention sheet was laid on 10 to cover the ground. These plots were left under natural conditions, and the number of weeds that grew in the plots after about 6 months was counted. Table 1 shows the results.

[0021]

[Table 1]

As can be seen from Table 1, the number of weeds in the section without the weed prevention sheet was 9.9 on average, whereas the number of weeds in the section with the weed prevention sheet was all zero. there were.

Example 2 Preparation of a sheet for plant growth and weed prevention and turf growth and weed prevention test 10 parts by weight of old newspaper was cut into a width of 0.2 cm, put into a mixer, and 600 parts by weight of water was added. The old newspaper was slurried by high-speed rotation. Then, 50 parts by weight of fly ash, 25 parts by weight of humus and a little amount of grass seeds (about 1 part by weight) were added and stirred. The resulting slurry was dehydrated with a stainless steel wire gauze, formed into a sheet, dried by blowing air at 40 ° C., and then cut to grow a plant having a sheet area shown in Table 2 and having a thickness of about 0.5 cm. Weed prevention sheet 4
Sheets (A, B, C and D) were obtained. The water content of these sheets was about 5% by weight. We selected land under very common natural conditions and performed general weeding (manual weeding completely removed the above-ground parts of the grass, but some grass roots remained). The four sheets were spread on this land at appropriate intervals and left under natural conditions. Table 2 shows the number and average length of turf plants after eight months. It should be noted that the number of weeds was 0 in each of the plots eight months later.

[0024]

[Table 2]

[0025]

The weed prevention sheet containing waste paper and fly ash as main components, both of which are sought to be reused as industrial waste, enables long-term weed prevention, and also enables waste paper, fly ash, fertilizer and A plant growth and weed prevention sheet containing a plant seed as a main component enables long-term weed prevention as well as successful growth of plants.

[Brief description of the drawings]

FIG. 1 is a view showing an area to which the sheet is applied in an experiment for demonstrating the effect of the sheet for weed prevention of the present invention.

[Procedure amendment]

[Submission date] April 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006] The fly ash used in the present invention includes ash generated when burning coal or oil in a boiler or the like for thermal power generation or for heating a building or the like. Ash generated when coal or oil is burned for power generation at power plants, especially fine ash in flue gas, and in a narrower sense JIS A6201
(1958).
According to JIS A 6201, fly ash is fine ash particles collected by a dust collector from a pulverized coal combustion boiler, silica is 45% or more, moisture content is 1% or less, ignition loss 5%.
Hereinafter, the specific surface area is 2700 cm ² / g or more, and the specific gravity is 1.95.
As described above, it is specified that 75% or more pass through the 44μ standard sieve. The fly ash used in the present invention may be any of the above, but the narrower the definition, the more preferable.

Claims (4)

[Claims] 1. A weed preventing sheet containing waste paper and fly ash. 2. A fly ash 1 for 1 part by weight of waste paper
A sheet for weed prevention comprising 10 to 10 parts by weight, wherein the content of water is 10% by weight or less of the sheet. 3. A plant growth and weed prevention sheet comprising waste paper and fly ash, and further comprising fertilizer and / or grass or tree seeds. 4. Plants comprising 1 to 10 parts by weight of fly ash and 1 to 10 parts by weight of fly ash and more than 0 to 20 parts by weight of fertilizer and / or grass or tree seed based on 1 part by weight of waste paper A sheet for growing and preventing weeds, wherein the content of water is 10% by weight or less of the sheet.