KR102259169B1 - A method for manufacturing an environmentally friendly compost using waste sanitary articles and environmentally-friendly compost - Google Patents

Abstract

The present invention relates to a method for manufacturing an eco-friendly compost by using a wet strong paper tissue made of pulp or waste hygiene products such as diapers and sanitary napkins, and a pre-treatment step of preparing the main raw material by selecting, washing, and washing the prepared waste hygiene products ( S10); A mixing step (S20) of generating a compost raw material by adding the crushed forest by-products to the prepared main raw material; Konjuk step (S30) of adjusting the sludge state by adding an enzyme solution containing microorganisms to the produced compost raw material; It is characterized in that it comprises a; composting step (S40) of fermenting the compost raw material adjusted to sludge at 32 ~ 38 ℃ for 1 to 3 days to compost.
Therefore, the present invention not only can reduce the overall cost of manufacturing by reducing costs by recycling waste hygiene products, but also contribute to the prevention of environmental pollution, and suppress pathogenic harmful fungi caused by excellent microorganisms to produce high-quality crops There is an effect that can be expected to grow.

Description

A method for manufacturing an environmentally friendly compost using waste sanitary articles and environmentally-friendly compost

The present invention relates to a method for manufacturing an eco-friendly compost using a pulp-made wet strong paper tissue or waste sanitary products such as diapers and sanitary napkins, and to the eco-friendly compost manufactured therefor, and more specifically, to the manufacturing by recycling waste sanitary products. It relates to a method for manufacturing an eco-friendly compost using waste sanitary products, which can reduce the cost, as well as contribute to the prevention of environmental pollution, and which can be expected to be eco-friendly and excellent crop growth, and to the eco-friendly compost manufactured therein.

Today, the rapid increase of organic waste in Korea and environmental pollution caused by its incineration and landfill disposal is emerging as a serious social problem. Most organic wastes can be decomposed by microorganisms in the soil, and include kitchen waste, agricultural and livestock waste, municipal sewage sludge, and industrial waste such as food manufacturing and paper mills.

In recent years, the use of disposable absorbent articles as hygiene products for infants or adults in hospitals, nursing homes, and homes is increasing. Almost all of these sanitary products are incinerated. Since the sanitary products used contain moisture such as urine, they will not be completely burned unless the combustion temperature is raised, increasing the cost of incineration and the amount of carbon dioxide generated during incineration. increase is a problem.

As a part of solving this problem, various treatment methods for using the used sanitary products as fuel, etc. have been proposed, for example, a carbonization treatment method using high-temperature steam and a heat processing method of vegetable oil.

However, rather than incinerating or using a sanitary product containing a large amount of natural fiber as a fuel, re-pulp the sanitary product or Korean Patent No. 10-0169065 and Korean Patent Application Laid-Open No. 10-2001-0067661 As disclosed, a method capable of composting is needed.

However, in the case of normal waste paper, it is possible to re-pulp by disassembling it by stirring it with water, but sanitary products with special treatment cannot be decomposed in this way. Moreover, looking at the existing composting process, it takes at least 15 days to a maximum of 60 days, so there is a limit to mass processing of sanitary products or mass production of compost.

Republic of Korea Patent Publication No. 10-0169065 (Title of the invention: fertilization method of paper sludge) Korean Patent Laid-Open Publication No. 10-2001-0067661 (Title of the invention: Manufacturing method of organic compost composition using commercial waste (paper sludge) and loess soil)

The present invention was created to more actively solve the above problems, and it not only decomposes specially treated sanitary products at a low cost, but also significantly shortens the incubation period that takes from one to two months, while An object of the present invention is to provide a method for producing an eco-friendly compost using waste sanitary products that can expect high-quality crop growth by suppressing pathogenic harmful fungi and the eco-friendly compost manufactured therein.

In order to achieve the above solution, the method for manufacturing an eco-friendly compost using waste sanitary products proposed in the present invention and the configuration of the eco-friendly compost manufactured therein are as follows.

The manufacturing method of eco-friendly compost using the above waste sanitary products includes a pre-treatment step of preparing a main raw material by selecting, washing and shredding the prepared waste sanitary products; A mixing step of generating a compost raw material by adding the crushed forest by-products to the prepared main raw material; Konjuk step of adjusting the sludge state by adding an enzyme solution containing microorganisms to the produced compost raw material; It characterized in that it comprises; the composting step of fermenting the compost raw material adjusted to sludge at 32~38℃ for 1 to 3 days to make it compost.

At this time, the above pretreatment step according to the present invention separates the used contaminated hygiene products from the badly determined hygiene products among the prepared waste hygiene products, and then washes the separated contaminated hygiene products to remove foreign substances and contains super absorbent polymer (Super) Absorbent Polymer) is characterized in that it undergoes a process of slicing the sanitary products determined to be defective and the washed sanitary products into 1 to 5 mm size after treatment.

In addition, in the above pretreatment step according to the present invention, the separated contaminated hygiene product is immersed in an absorption inhibitor mixed with 70 to 90% by weight of water and 30 to 10% by weight of calcium chloride to remove foreign substances and water absorption of the superabsorbent polymer contained therein. A method for producing an eco-friendly compost using waste sanitary products, characterized in that suppression treatment.

In addition, in the above mixing step according to the present invention, 10 to 30% by weight of a thermoplastic resin is mixed with 70 to 90% by weight of the main raw material, and then to the mixture, a forest by-product such as twigs and sawdust that is crushed to 1-5 mm is 1: It is characterized in that it is added in a weight ratio of 1 and stirred to produce a compost raw material.

In addition, the above thermoplastic resin according to the present invention is any one of polyvinyl chloride, polystyrene, polyethylene, polypropylene, acrylic, polyamide resin or It is characterized by a complex composition.

In addition, in the stomach porridge step according to the present invention, the microorganism inoculated in 25L of water with 10% salinity is added to the enzyme solution cultured at 37 ° C. for 3 to 5 days to form sludge with a water content of 65 to 70% at pH 6.5 to 7.5. characterized by adjustment.

In addition, the gastric microorganism according to the present invention Bacillus licheniformis (Bacillus licheniformis), Bacillus subtilis (Bacillus subtilis), Bacillus stearothermophillus (Bacillus stearothermophillus) any one or two or more of a composite composition characterized.

In addition, the gastric enzyme solution according to the present invention is characterized in that 25% by weight of molasses, 20% by weight of beet pulp, and 30% by weight of zeolite are added to 25% by weight of microbial cultured water.

In addition, in the above aging step according to the present invention, the compost raw material adjusted to sludge is put into a sealed agitator and tumbled 3 to 6 times every 24 hours while supplying hot air at 35° C. for 1 to 2 minutes every 1 to 2 hours. characterized.

The compost produced by the method according to the present invention has a moisture content of 40-50%, and contains 1.4×10 ^{7 Bacillus spp and 1.4×10 7 Lactic acid bacteria per gram (g).} do it with

According to the present invention having the above-described configuration, the following effects are provided.

First, by recycling waste sanitary products, it is possible not only to reduce the overall cost of manufacturing by reducing costs, but also to contribute to the prevention of environmental pollution.

Second, the price competitiveness of compost can be promoted by suppressing the function of the super absorbent polymer contained in sanitary products through an absorption inhibitor manufactured at a lower cost.

Third, while remarkably shortening the fermenting period, which takes one to two months, it is possible to mass-produce compost along with rapid mass processing of sanitary products.

Fourth, high-quality crop growth can be expected by suppressing pathogenic and harmful mold with microorganisms due to excellent composting conditions and enzyme solution.

1 is a flowchart schematically illustrating a manufacturing process according to the present invention as a whole.
Figure 2 is a perspective view showing the entire manufacturing apparatus according to the present invention.
Figure 3 is a manufacturing state diagram showing the operation of the manufacturing apparatus according to the present invention.
4 and 5 are detailed views showing enlarged main parts of the manufacturing apparatus according to the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration of the present invention and the actions and effects thereof will be described collectively.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to embodiments described later in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only this embodiment is intended to complete the disclosure of the present invention, and common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. In addition, the same reference numerals refer to the same elements throughout the entire specification.

The present invention relates to a method for producing an eco-friendly compost using a pulp-made wet strong paper tissue or waste hygiene products such as diapers and sanitary napkins, as shown in FIG. 1 , a pre-treatment step (S10), a mixing step (S20), a kneading step ( S30), it is a method of manufacturing an eco-friendly compost by sequentially passing through the fermentation step (S40).

The manufacturing method and eco-friendly compost of the present invention can not only reduce the overall cost of manufacturing by reducing costs by recycling waste sanitary products, but also contribute to the prevention of environmental pollution, as well as prevent pathogenic harmful mold caused by excellent microorganisms. The main point is to be able to expect high-quality crop growth by suppressing it.

<Pre-processing step (S10)>

The pretreatment step (S10) is a process of preparing the main raw material by screening, washing, and shredding the prepared waste hygiene products. That is, among the prepared waste hygiene products, the sanitary products determined to be defective and the used contaminated hygiene products are separated. Then, the water absorption of the water absorbent resin contained is suppressed while removing foreign substances by washing the separated contaminated sanitary products. Then, the sanitary products judged to be defective and the washed sanitary products are cut into pieces of 1-5 mm in size.

At this time, the separated contaminated hygiene products are immersed in an absorption inhibitor mixed with 70 to 90% by weight of water and 30 to 10% by weight of calcium chloride to remove foreign substances while suppressing water absorption of the contained super absorbent polymer. .

In other words, the absorption inhibitor, in which water and calcium chloride are mixed in a certain ratio, uses calcium chloride, which decomposes the high water absorbent polymer, which is a high molecular weight, into a low molecular material to have solubility in water, so that the super absorbent polymer contained in the waste hygiene product is partially decomposed. Thus, it is possible to obtain the effect of lowering the absorption power at a low cost.

Here, if the proportion of calcium chloride is less than 10% by weight, the absorption inhibitory power of the super absorbent polymer is weak, and if it exceeds 30% by weight, the concentration of calcium chloride becomes excessively high, and an excessive amount of calcium chloride is included in the compost. It is preferable to have a ratio of 90% by weight and 10 to 30% by weight of calcium chloride.

Of course, in addition to the aforementioned absorption inhibitors, starch-based, cellulose-based or polyacrylic acid salt-based, polyvinyl alcohol-based, polyacrylamide-based and polyoxyethylene It can be composed of synthetic resins such as (polyoxyethylene).

<Mixing step (S20)>

The mixing step (S20) is a process of generating a compost raw material by adding the crushed forest by-products to the prepared main raw material. That is, 10 to 30% by weight of the thermoplastic resin is mixed with 70 to 90% by weight of the main raw material prepared in the pretreatment step (S10). Preferably, it is good to mix 20% by weight of the powder-treated thermoplastic resin with 80% by weight of the main raw material. And after adding forest by-products such as tree branches and sawdust crushed to 1-5 mm to the mixture of the main raw material and the thermoplastic resin in a 1:1 weight ratio, the mixture is stirred to produce a compost raw material.

At this time, the thermoplastic resin may be any one or a composite composition of polyvinyl chloride, polystyrene, polyethylene, polypropylene, acrylic, and polyamide resins. have. It is good to promote environmental protection by using such a thermoplastic resin that has been recycled.

<Konjuk step (S30)>

Konjuk step (S30) is a process of adjusting the sludge state by adding an enzyme solution containing microorganisms to the produced compost raw material. That is, the enzyme solution inoculated in 25L of water with 10% salinity is cultured at 37°C for 3 to 5 days and added to the composting material produced in the mixing step (S20), pH 6.5 to 7.5, moisture content of 65 to 70% Adjust to sludge condition. Here, the enzyme solution may include 25% by weight of molasses, 20% by weight of beet pulp, and 30% by weight of zeolite to 25% by weight of microbial cultured water. In this case, more water is added to increase the moisture content of the compost material.

At this time, the microorganism is any one or a combination of two or more of Bacillus licheniformis, Bacillus subtilis, and Bacillus stearothermophillus that can grow in anaerobic anaerobic conditions can be composed of That is, the microorganisms extracted from the soil are stored in Nutrient Broth medium to which agar is added.

<Stage to stay (S40)>

The fermentation step (S40) is a process of composting the compost raw material adjusted to sludge by fermenting it at 32~38℃ for 1 to 3 days. That is, the compost raw material adjusted to the sludge in the kneading step (S30) is put into a sealed agitator and tumbled 3 to 6 times every 24 hours while supplying hot air at 35° C. for 1 to 2 minutes every 1 to 2 hours. Preferably, it is good to tumble 5 times every 24 hours while supplying hot air at 5° C. for 2 minutes every hour.

The compost produced by this process has a moisture content of 40-50% and contains 1.4×10 ^{7 Bacillus spp and 1.4×10 7 Lactic acid bacteria per gram (g).} Therefore, high quality crop growth can be expected by suppressing pathogenic and harmful mold caused by microorganisms due to excellent composting conditions and enzyme solution.

At this time, 30-50% of coffee by-product compost in which coffee by-products and additives are mixed in a 1:1 weight ratio with respect to the total weight of the waste sanitary product compost completed by the present invention may be blended. Here, coffee by-products are used that have been completely dried in a clean state in an external and sealed dryer.

And as an additive, any one or a mixture of two or more of milk, yogurt, makgeolli, and rice water is used. This coffee by-product compost contains five major elements of N, K, Ca, Ma, and P and four trace elements of Cu, Fe, Zn, and Mn.

Therefore, it is possible to prevent environmental pollution by recycling coffee by-products, which are environmental wastes, as it contains a large amount of elements that can be used by crops in neutral soil.

On the other hand, the stirrer of the present invention is a frame 10 having a size that can accommodate a compost raw material of a set capacity as shown in FIG. 2, and a stirring tank 20 that is rotatably disposed along a hinge H at the upper end of the frame 10. And, a stirring auger 30 that rotates by receiving power from the motor M in the center of the stirring tank 20, and a stirring cylinder 40 disposed in the frame 10 to flow the stirring tank 20 to the left and right ) is better to use.

Although not shown in the drawings, this agitator includes a cover that opens and closes at the top of the stirring tank 20, a pipe for supplying and circulating hot air on the cover, and a screw conveyor for supplying/discharging compost material into and out of the stirring tank 20 do.

That is, when the compost raw material is supplied to the stirring tank 20, the stirring auger 30 rotates according to the set timer and the hot air is circulated inside. And the agitation cylinder 40 is operated to flow left and right with vibration in the stirring tank 20 as shown in FIG. 3 to tumble the compost raw material.

Here, the stirring auger 30 may be configured as a ribbon type or an avatar type. In the ribbon type, the stirring blades 35 spirally wound on the outer surface of the stirring shaft 31 are arranged in the forward and reverse directions, respectively, as shown in FIG. 4 . This ribbon-type stirring auger 30 mixes the compost raw material while continuously moving left and right in the direction of the stirring shaft 31 .

And as shown in FIG. 5, the stirring blades 35 composed of paddles inclined at a predetermined angle on the outer surface of the stirring shaft 31 are arranged radially and in plurality in the axial direction. The avatar-type stirring auger 30 moves and mixes the compost raw material in the direction of rotation perpendicular to the rotation shaft 31 .

Hereinafter, in order to prove the effect of the method for manufacturing compost according to the present invention and the compost prepared therefor, an experiment was conducted as follows.

<Experiment method>

To investigate the plant pathogenic fungal inhibitory ability, the number of bacteria and the yield of tomato crops for the compost prepared by the present invention (Example) and commercially available compost (Comparative Example).

<Sample production>

In 25L of water with 10% salinity, in a state where microorganisms were cultured at 37°C for 3 days, an enzyme solution mixed with 25 kg of molasses, 25 kg of beet pulp, and 35 kg of zeolite was mixed with compost, and water content was 68% sludge. , and then tumbled 5 times every 24 hours while supplying hot air at 35° C. from the stirrer for 2 minutes every hour to complete compost for 3 days. Here, the enzyme solution was divided into Bacillus licheniformis (Example 1), Bacillus subtilis (Example 2), and Bacillus stearosmophilus (Example 3), and each was completed separately.

<Evaluation of plant pathogenic fungal inhibitory power>

After layering the Rhizopus stronifer cells, a plant pathogenic fungus, on a YM agar plate, put a sterilized paper disc on top, and 20 μl of each of Examples 1 to 3 and Comparative Example compost was dropped onto the paper disc, and then the agar plate was placed at 30°C After culturing for 5 days, the size of the inhibition ring was measured.

<Analysis of number and species of compost>

100 mg of the compost of Examples 1 to 3 and Comparative Example ^{was serially diluted in 9 ml of physiological saline at a 10 -10} to 10 ^-8 fold, spread on a YM agar plate, and cultured at 37° C. for 3 days, and then the number and species of bacteria were analyzed. did.

<Crop test on compost>

From the time of sowing in the tomato field, the compost of Examples 1 to 3 and Comparative Example was respectively sprayed on the soil at a one-month cycle, and finally the crop yields were compared.

<Result of evaluation of phytopathogenic fungal inhibitory ability>

division Inhibitory ring size (mm) Example 1 18 Example 2 19 Example 3 30 Comparative example 12

As a result of evaluating the growth inhibitory ability against the phytopathogenic fungus Rhizopus stronifer, all composts showed inhibitory activity on the fungal growth. However, looking at the inhibitory performance by the size of the inhibitory ring, as shown in Table 1, Examples were generally superior to Comparative Examples, and among them, Example 3, which is Bacillus stearosmophilus, was the most excellent.

<Result of compost bacteria count and species analysis>

division Number of cells (10 ⁸ cells/g) Example 1 7.5 Example 2 3.5 Example 3 2.0 Comparative example 1.2

As a result of analyzing the number and types of bacteria in the compost, Bacillus spp and Lactic acid bacteria were found in all composts. However, as shown in Table 2, the number of cells per gram (g) was generally superior to that of Comparative Example, and it can be seen that Example 1, which is Bacillus licheniformis, was the highest among them.

<Result of crop test on compost>

division Yield (kg) Relative Yield (%) Example 1 37.5 129 Example 2 40.1 137 Example 3 36.5 125 Comparative example 29.0 100

As a result of the crop test on compost, as shown in Table 3, the yield compared to the same area was increased in the Example from a minimum of 25 to a maximum of 37 compared to the Comparative Example. Among them, it can be seen that the yield of Example 2, which is Bacillus subtilis, is the highest.

As described above, the present invention can reduce the overall cost of manufacturing by recycling waste sanitary products, as well as contribute to the prevention of environmental pollution, and reduce the cost of the super absorbent polymer contained in sanitary products at a lower cost. It is possible to promote the price competitiveness of compost by suppressing treatment through absorption inhibitors produced with And while remarkably shortening the fermentation period, which takes one to two months, it is possible to mass-produce the properties of compost along with the property mass processing of sanitary products, as well as suppress pathogenic harmful molds with microorganisms due to excellent composting conditions and enzyme solutions High-quality crop growth can be expected.

H: Hinge M: Motor
10: frame 20: stirred tank
30: stirring auger 31: stirring shaft
35: wing 40: stirring cylinder
S10: pre-processing step
S20: mixing step
S30: Konjuk stage
S40: Fertility stage

Claims (3)

In the method of manufacturing an eco-friendly compost using waste hygiene products,
A pre-processing step (S10) of preparing a main raw material by screening, washing, and slicing the prepared waste hygiene products;
Polyvinyl chloride, polystyrene, polyethylene, polypropylene, acrylic, polyamide resin, or any one of polyvinyl chloride, polystyrene, polyethylene, polypropylene, acryl, and polyamide resin, or 10-30 wt% of a composite composition by mixing 70-90 wt% of the main raw material prepared in the pre-treatment step A mixing step (S20) of adding by-products in a 1:1 weight ratio and then stirring to produce;
Konjuk step (S30) of adjusting the sludge state by adding an enzyme solution containing microorganisms to the produced compost raw material;
Fermenting the compost raw material adjusted to sludge at 32~38℃ for 1 to 3 days to compost it (S40);
Including,
The kneading step (S30) is to adjust the sludge state of pH 6.5-7.5 moisture content of 65-70% by adding the enzyme solution in which the microorganisms inoculated in 25L of water with 10% salinity are cultured at 37°C for 3-5 days. A method of manufacturing eco-friendly compost using waste sanitary products.


delete The compost prepared by the method according to claim 1 has a moisture content of 40-50% and contains 1.4×10 ^{7 Bacillus spp and 1.4×10 7 Lactic acid bacteria per gram (g).} Eco-friendly compost using waste hygiene products.

Images