JP2019206656A - Processing method of used sanitation article - Google Patents

Abstract

To provide a method of reducing cost by making it easy to dispose used sanitary article.SOLUTION: A disposal method of the present invention is a processing method of a used sanitary article, which includes: a pulverization process for cutting and pulverizing by adding water to the used sanitary article using a high-absorbent resin; and a decomposition process of adding and mixing a decomposer of making lose hydrophilicity or water retention ability of the high absorbent resin after swollen due to water of an excreted matter, in which, at the time of the processing, by cutting a raw material of the sanitary article with a cutting blade 4b rotating with a high speed to pulverize to impart fluidity capable of exhausting to a sewage work, the fluidity of the high absorbent resin due to the pulverization is desirable to be 70% or higher by a decomposition rate due to a passing amount when filtered with a lattice grid having an opening of 1 mm. As needs arise, water is added to the pulverized processed product followed by stirring and mixing, the processed product may be discharged to the sewage work together with water.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for treating used paper diapers and other used sanitary goods.

  In recent years, the use of disposable diapers for adults and childcare, mats for incontinence, and other sanitary products has been increasing to reduce the burden of nursing care and childcare. These hygiene products are composed of granular superabsorbent resin, finely divided cellulose, nonwoven fabric, adhesive tape, and strings, and 100 to 200 ml of infant manure is 300 to 400 ml for adults, but 50 to 200. Superabsorbent resin, which is said to have double water absorption capacity, absorbs and retains moisture in manure instantaneously in a network structure to form a gel-like solid, and fine cellulose absorbs moisture from the gel-like substance. To prevent the transition to.

  However, used paper diapers and other sanitary goods become heavy due to the high water-absorbing resin absorbing manure and are unsanitary and have a foul odor. Particularly in hospitals and nursing care facilities that consume a large amount of sanitary goods, a great deal of labor and cost are excessive.

  On the other hand, as shown in Patent Documents 1 and 2 above, steps such as addition of a decomposing agent or dehydrating agent that hydrolyzes the gelled superabsorbent resin, and is pulverized by a pulverizer, etc. After obtaining and separating into a solid component and a liquid component, a method of recovering the solid component and releasing the liquid component into sewage is known.

JP 2004-25574 A JP 2000-84533 A

  However, the inventions of the above Patent Documents 1 and 2 both require the separation of nonwoven fabrics and other solid materials, which are materials for paper diapers, from moisture. It requires equipment and labor to process. The recovery of the solid components in the decomposed products also has the purpose of reusing resources, but considering the recycling costs, the main reason is that if the decomposed products are discarded as sewage, the sewer pipes are clogged and clogged with solid components. Because. This problem is common to feminine sanitary products made of similar materials.

  The present invention provides a gelled superabsorbent resin and finely pulverizes the solid components of the non-woven fabric field and other sanitary ware materials to provide sufficient fluidity to the treated product, so that sewage can be discarded without clogging the sewer pipe. It is something to process.

  The treatment method of the present invention for solving the above-mentioned problems is as follows. First, the used hygiene product using the superabsorbent resin is swelled by pulverization by hydrating, cutting and pulverizing, and the water of excreta A treatment method for used sanitary ware which performs a decomposition process of adding and mixing a decomposing agent that loses hydrophilicity or water holding power of the superabsorbent resin, with a cutting blade 4b which rotates the material of the sanitation article at a high speed during the above process It is characterized by providing fluidity that can be discharged into the sewer by cutting and pulverizing.

  Secondly, the fluidity of the highly water-absorbent resin by fine pulverization is characterized by being 70% or more in terms of the decomposition rate by the permeation amount when filtered through a 1 mm mesh grid.

  Thirdly, it is characterized by adding water to a finely pulverized processed product, stirring and mixing, and discharging the processed product together with moisture into a sewer.

  Fourth, the finely pulverized processed product is subjected to solid-liquid separation, the solid component is recovered, and the liquid component is discharged to the sewer.

  Fifth, the decomposition agent for the gel-like solid of the superabsorbent resin is aluminum sulfate, aluminum chloride, iron chloride, iron sulfate, copper sulfate, copper chloride, zinc chloride, zinc sulfate or other light metal chloride or sulfate or Acetic acid, succinic acid, lactic acid, butyric acid, citric acid, wood vinegar, bamboo vinegar and other organic acids or hydrochloric acid, sulfuric acid and other minerals, or salt or calcium, magnesium, aluminum strong acid or weak acid salt alone or a mixture of two or more The addition amount of the decomposing agent is 20 to 200 wt% with respect to the amount of the superabsorbent resin in the treated product.

  Sixth, the present invention is characterized in that the processed product is cut and finely pulverized by the pulverizing apparatus 1 having a plurality of cutting blades and provided with a cutter shaft 4a that rotates at high speed.

  According to the treatment method of the present invention configured as described above, the used sanitary ware is cut, pulverized and stirred under the addition of a hydrolyzed and gelled superabsorbent resin decomposing agent. Therefore, it becomes possible to discharge and discard the wastewater into the sewer without blocking the sewer. By the way, according to the Ministry of Land, Infrastructure, Transport and Tourism, recently, the development of sewage treatment plants has progressed and advanced effluent treatment of industrial wastewater has progressed and the population has decreased, so it is possible to accept these treatments. It is believed that.

  Sanitary products generated in large quantities, especially from hospitals, nursing homes and other large facilities, because it becomes possible to discharge and dispose of used sanitary products generated in large quantities as described above into sewers without solid-liquid separation. There is an advantage that labor costs such as waste separation processing, distribution / storage management and solid-liquid separation, equipment costs, and operating costs can be greatly reduced. In addition, the conventional incineration of sanitary ware waste is not necessary, and the furnace management and environmental pollution prevention measures associated with incineration are not necessary.

It is a schematic diagram of the flow of the processing method and apparatus used for the method of this invention. It is a flow schematic diagram of a processing method and a processing apparatus used when collect | recovering the solid component in the processed material hydrolyzed. (A) is a photograph showing the filtration state of the processed product to which the decomposition agent is not added after the pulverization treatment, and (B) is a photograph showing the filtration state when the decomposition agent is similarly added.

  FIG. 1 is a flow chart showing an outline of an apparatus for processing used sanitary goods (in this example, paper diapers are treated) according to the method of the present invention. In this example, the used paper diapers are added and cut and pulverized. A pulverizing apparatus (disposer) 1 and an agitation tank 2 for charging and decomposing water and a decomposing agent by introducing the pulverized processed material are provided.

  The crusher 1 supports a cutter shaft 4a coaxially in a cylindrical case 3 that is horizontally oriented and closed at both ends, and a number of cutting blades 4b project radially from the cutter shaft 4a. 4, and the cutter shaft 4a is rotated at a high speed of, for example, about 1425 rpm to 1725 rpm by a rotary drive (motor) 6 attached outside the case 3.

  In the upper part of the case 3, a paper diaper and a hopper 7 for supplying water are provided. The amount of water added at this time is about 5 to 10 times the weight of the paper diaper. The used used paper diaper is pulverized as much as possible with the cutter 4 in the water supplied (hydrated) in the case 3, and the cut and pulverized processed product flows together with moisture. It becomes a fluid and is sent to the stirring tank 2 below the lower discharge port 8.

  An agitator 9 for agitating the processed material is inserted and supported downward in the agitation tank 2, and the agitator 9 agitates the agitating blade 9b on the lower end side by a rotary drive device (motor) 9a on the upper end side. Stir. In addition, a decomposing agent for eliminating the gel by losing hydrophilicity or water holding power to the superabsorbent resin gelled by absorbing water in the used paper diaper on the stirring tank 2 is supplied. The decomposing agent addition apparatus 11 is installed. The decomposition agent is preferably about 0.2 to 2.0 times the weight of the paper diaper.

  Furthermore, in the agitation tank 2, water is further added to increase the moisture content of the treated product and to increase the dispersion and fluidity of the superabsorbent resin from which the gel has been eliminated. The amount of water added at this time is about 10 to 20 times the weight of the disposable diaper. By adding the hydrolyzed decomposing agent here, the gel-dissolved resin, the cut and crushed nonwoven fabric and other solid components, feces and urine are uniformly dispersed and mixed in water in a finely pulverized state.

  Since the treated product treated as described above has high fluidity, it is in a state where it can be discharged without sewage discharge and without clogging the sewer. Although an effect can also be expected, it is possible to deodorize by adding, for example, activated carbon, diatomaceous earth, diatom shale, bentonite, fumed silica, zeolite, etc., which are porous materials. About 5 wt% is desirable.

  The decomposing agent is mixed in the form of minerals such as hydrochloric acid and sulfuric acid, salt, or one or more mixtures of calcium, magnesium, aluminum strong acid or weak acid salts, etc., as a powder or an aqueous solution, and flow. However, the best form is 10 to 80% of one kind of strong acid or weak acid salt of calcium, magnesium or aluminum metal and oxalic acid, lactic acid, butyric acid, citric acid, succinic acid, malic acid. It is a mixture of 5 to 40% of one kind of organic acid such as oxycarboxylic acids or acetic acid, wood vinegar or bamboo vinegar.

  In view of efficient cutting and pulverization, imparting high fluidity and stirring efficiency, it is desirable that the pulverizer 1 and the agitator 2 are separately provided as shown in FIG. Stirring may be performed by once pulverizing the product, adding hydrolyzed and decomposed, and operating the pulverizer 1.

  FIG. 2 shows a pulverizing apparatus 1 and an agitating apparatus 2 that are the same as those in FIG. 1 for crushing and stirring used paper diapers (note: parts common to those in FIG. A known solid-liquid separation device 12 shown in Japanese Unexamined Patent Publication No. 2013-13556 etc. is installed, and a processed product in which the superabsorbent resin after stirring is decomposed is supplied to this device to separate the solid and liquid, and the separated water Can be discharged into sewage, and the collected solids can be used as recycled resources after recovery and used for other processing. Also in this case, the stirring tank 2 can be hydrated in order to impart higher fluidity to the treated product.

  Next, experimental results of the pulverization process of the superabsorbent resin used in the disposable diaper and the disposable diaper, which are the objects to be processed according to the present invention, and the decomposition process using the decomposition agent will be described.

1. Crushing and disassembling of disposable diapers In this experiment, as shown in FIGS. 3 (A) and 3 (B), commercially available unused baby diapers (P & G, product name “First skin best” 26g / sheet ) For 2 sheets, add 2 liters of tap water and cut and finely pulverize the processed material with a crusher (disposer for business use, rotation speed: 1425 rpm to 1725 rpm) for 1 min. The sieving process was performed for 1 minute, and the falling state from the mesh was confirmed.

  FIG. 3 (A) shows the case where no decomposing agent is added, and FIG. 3 (B) shows that 1% of calcium chloride 2 is 1% of the processed product obtained by pulverizing the decomposing agent blended at a ratio of malic acid 1. The case where it added is shown. As a result, in FIG. 3 (A), most of the processed material remains on the net, whereas in FIG. 3 (B), it can be confirmed that almost the entire amount has fallen into the beaker. It was confirmed that the formability and the entanglement between the fibers were almost lost and high fluidity was provided.

  In an actual used paper diaper, the deodorizing effect can be obtained at the same time by adding, for example, a mixture of a deodorizing liquid and diatomaceous earth to the decomposing agent when the decomposing agent is added.

2. Decomposition experiment of superabsorbent resin This experiment is for confirming the decomposability of various decomposing agents for gelled superabsorbent resin or their combination and blending ratio. Additive standard starch acrylate) to 1g, 200g of water was added to form a gel, and the decomposition agent was added and mixed, filtered through a grid with a wire diameter of 0.4mm and an aperture of 1mm, The decomposition rate was calculated by measuring the amount of residue remaining. The experimental results are shown in Tables 1 to 7 below.

  In the above results, calcium chloride is the economical agent for the superabsorbent resin decomposing agent, but when the amount added exceeds 50% of the superabsorbent resin, an insoluble compound is precipitated in water. Since there is a concern about blocking the sewer pipe, the addition amount is preferably 40% or less. In addition, the decomposition agent for super absorbent resin of paper diaper composition has a higher decomposition function in the mixture of calcium chloride and malic acid than the mixture of calcium chloride and citric acid, and the synergistic effect of both is particularly excellent I found.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Stirrer tank 4 Cutter 4a Cutter shaft 4b Cutting blade 9 Stirrer 11 Decomposing agent addition device 12 Solid-liquid separation device

  The present invention relates to a method for treating used paper diapers and other used sanitary goods.

  In recent years, the use of disposable diapers for adults and childcare, mats for incontinence, and other sanitary products has been increasing to reduce the burden of nursing care and childcare. These hygiene products are composed of granular superabsorbent resin, finely divided cellulose, nonwoven fabric, adhesive tape, and strings, and 100 to 200 ml of infant manure is 300 to 400 ml for adults, but 50 to 200. Superabsorbent resin, which is said to have double water absorption capacity, absorbs and retains moisture in manure instantaneously in a network structure to form a gel-like solid, and fine cellulose absorbs moisture from the gel-like substance. To prevent the transition to.

  However, used paper diapers and other sanitary goods become heavy due to the high water-absorbing resin absorbing manure and are unsanitary and have a foul odor. Particularly in hospitals and nursing care facilities that consume a large amount of sanitary goods, a great deal of labor and cost are excessive.

  On the other hand, as shown in Patent Documents 1 and 2 above, steps such as addition of a decomposing agent or dehydrating agent that hydrolyzes the gelled superabsorbent resin, and is pulverized by a pulverizer, etc. After obtaining and separating into a solid component and a liquid component, a method of recovering the solid component and releasing the liquid component into sewage is known.

JP 2004-25574 A JP 2000-84533 A

  However, the inventions of the above Patent Documents 1 and 2 both require the separation of nonwoven fabrics and other solid materials, which are materials for paper diapers, from moisture. It requires equipment and labor to process. The recovery of the solid components in the decomposed products also has the purpose of reusing resources, but considering the recycling costs, the main reason is that if the decomposed products are discarded as sewage, the sewer pipes are clogged and clogged with solid components. Because. This problem is common to feminine sanitary products made of similar materials.

  The present invention provides a gelled superabsorbent resin and finely pulverizes the solid components of the non-woven fabric field and other sanitary ware materials to provide sufficient fluidity to the treated product, so that sewage can be discarded without clogging the sewer pipe. It is something to process.

The processing method of the present invention for solving the above-mentioned problems is as follows. First, used sanitary goods using a highly water-absorbent resin are hydrated, cut and pulverized, and the high swelled by the water of excreta. A method for treating used sanitary goods, wherein a hydrophilic agent of the water-absorbent resin or a decomposing agent that loses water retention capacity is added and mixed, and a cutting blade 4b that rotates the sanitary article material at a high speed during the pulverization process. Cut and finely pulverize , and further hydrolyze the finely pulverized product during the decomposition treatment, and add a decomposition agent comprising calcium chloride, calcium chloride and at least one of citric acid or malic acid, and mix by stirring . It is characterized by providing fluidity that can be discharged into the sewer without clogging the sewer pipe .

Secondly, it is characterized in that a treated product imparted with fluidity that can be discharged into the sewer is discharged into the sewer along with moisture .

Third, the treated product discharged to the sewer is granted fluidity can solid-liquid separation, the recovered liquid component The solid component is characterized by discharging the sewage.

The fourth feature is that the processed material is cut and finely pulverized by a pulverizing apparatus 1 having a plurality of cutting blades and provided with a cutter shaft 4a that rotates at high speed.

  According to the treatment method of the present invention configured as described above, the used sanitary ware is cut, pulverized and stirred under the addition of a hydrolyzed and gelled superabsorbent resin decomposing agent. Therefore, it becomes possible to discharge and discard the wastewater into the sewer without blocking the sewer. By the way, according to the Ministry of Land, Infrastructure, Transport and Tourism, recently, the development of sewage treatment plants has progressed and advanced effluent treatment of industrial wastewater has progressed and the population has decreased, so it is possible to accept these treatments. It is believed that.

  Sanitary products generated in large quantities, especially from hospitals, nursing homes and other large facilities, because it becomes possible to discharge and dispose of used sanitary products generated in large quantities as described above into sewers without solid-liquid separation. There is an advantage that labor costs such as waste separation processing, distribution / storage management and solid-liquid separation, equipment costs, and operating costs can be greatly reduced. In addition, the conventional incineration of sanitary ware waste is not necessary, and the furnace management and environmental pollution prevention measures associated with incineration are not necessary.

It is a schematic diagram of the flow of the processing method and apparatus used for the method of this invention. It is a flow schematic diagram of a processing method and a processing apparatus used when collect | recovering the solid component in the processed material hydrolyzed. (A) is a photograph showing the filtration state of the processed product to which the decomposition agent is not added after the pulverization treatment, and (B) is a photograph showing the filtration state when the decomposition agent is similarly added.

  FIG. 1 is a flow chart showing an outline of an apparatus for processing used sanitary goods (in this example, paper diapers are treated) according to the method of the present invention. In this example, the used paper diapers are added and cut and pulverized. A pulverizing apparatus (disposer) 1 and an agitation tank 2 for charging and decomposing water and a decomposing agent by introducing the pulverized processed material are provided.

  The crusher 1 supports a cutter shaft 4a coaxially in a cylindrical case 3 that is horizontally oriented and closed at both ends, and a number of cutting blades 4b project radially from the cutter shaft 4a. 4, and the cutter shaft 4a is rotated at a high speed of, for example, about 1425 rpm to 1725 rpm by a rotary drive (motor) 6 attached outside the case 3.

  In the upper part of the case 3, a paper diaper and a hopper 7 for supplying water are provided. The amount of water added at this time is about 5 to 10 times the weight of the paper diaper. The used used paper diaper is pulverized as much as possible with the cutter 4 in the water supplied (hydrated) in the case 3, and the cut and pulverized processed product flows together with moisture. It becomes a fluid and is sent to the stirring tank 2 below the lower discharge port 8.

  An agitator 9 for agitating the processed material is inserted and supported downward in the agitation tank 2, and the agitator 9 agitates the agitating blade 9b on the lower end side by a rotary drive device (motor) 9a on the upper end side. Stir. In addition, a decomposing agent for eliminating the gel by losing hydrophilicity or water holding power to the superabsorbent resin gelled by absorbing water in the used paper diaper on the stirring tank 2 is supplied. The decomposing agent addition apparatus 11 is installed. The decomposition agent is preferably about 0.2 to 2.0 times the weight of the paper diaper.

  Furthermore, in the agitation tank 2, water is further added to increase the moisture content of the treated product and to increase the dispersion and fluidity of the superabsorbent resin from which the gel has been eliminated. The amount of water added at this time is about 10 to 20 times the weight of the disposable diaper. By adding the hydrolyzed decomposing agent here, the gel-dissolved resin, the cut and crushed nonwoven fabric and other solid components, feces and urine are uniformly dispersed and mixed in water in a finely pulverized state.

  Since the treated product treated as described above has high fluidity, it is in a state where it can be discharged without sewage discharge and without clogging the sewer. Although an effect can also be expected, it is possible to deodorize by adding, for example, activated carbon, diatomaceous earth, diatom shale, bentonite, fumed silica, zeolite, etc., which are porous materials. About 5 wt% is desirable.

The form of formulation of the decomposer, hydrochloric, mineral acids such as sulfuric acid, calcium, magnesium, one or more mixtures of such aluminum metal strong or weak salts were added to the treated product as a powder or an aqueous solution liquidity The best form is 10 to 80% of strong acid or weak acid salts of calcium or magnesium or aluminum metal, and oxyacids of oxalic acid, lactic acid, butyric acid, citric acid, succinic acid, malic acid It is a mixture with 5 to 40% of one kind of organic acids such as carboxylic acids or acetic acid, wood vinegar or bamboo vinegar.

  In view of efficient cutting and pulverization, imparting high fluidity and stirring efficiency, it is desirable that the pulverizer 1 and the agitator 2 are separately provided as shown in FIG. Stirring may be performed by once pulverizing the product, adding hydrolyzed and decomposed, and operating the pulverizer 1.

  FIG. 2 shows a pulverizing apparatus 1 and an agitating apparatus 2 that are the same as those in FIG. 1 for crushing and stirring used paper diapers (note: parts common to those in FIG. A known solid-liquid separation device 12 shown in Japanese Unexamined Patent Publication No. 2013-13556 etc. is installed, and a processed product in which the superabsorbent resin after stirring is decomposed is supplied to this device to separate the solid and liquid, and the separated water Can be discharged into sewage, and the collected solids can be used as recycled resources after recovery and used for other processing. Also in this case, the stirring tank 2 can be hydrated in order to impart higher fluidity to the treated product.

  Next, experimental results of the pulverization process of the superabsorbent resin used in the disposable diaper and the disposable diaper, which are the objects to be processed according to the present invention, and the decomposition process using the decomposition agent will be described.

1. Crushing and disassembling of disposable diapers In this experiment, as shown in FIGS. 3 (A) and 3 (B), commercially available unused baby diapers (P & G, product name “First skin best” 26g / sheet ) For 2 sheets, add 2 liters of tap water and cut and finely pulverize the processed material with a crusher (disposer for business use, rotation speed: 1425 rpm to 1725 rpm) for 1 min. The sieving process was performed for 1 minute, and the falling state from the mesh was confirmed.

  FIG. 3 (A) shows the case where no decomposing agent is added, and FIG. 3 (B) shows that 1% of calcium chloride 2 is 1% of the processed product obtained by pulverizing the decomposing agent blended at a ratio of malic acid 1. The case where it added is shown. As a result, in FIG. 3 (A), most of the processed material remains on the net, whereas in FIG. 3 (B), it can be confirmed that almost the entire amount has fallen into the beaker. It was confirmed that the formability and the entanglement between the fibers were almost lost and high fluidity was provided.

  In an actual used paper diaper, the deodorizing effect can be obtained at the same time by adding, for example, a mixture of a deodorizing liquid and diatomaceous earth to the decomposing agent when the decomposing agent is added.

2. Decomposition experiment of superabsorbent resin This experiment is for confirming the decomposability of various decomposing agents for gelled superabsorbent resin or their combination and blending ratio. Additive standard starch acrylate) to 1g, 200g of water was added to form a gel, and the decomposition agent was added and mixed, filtered through a grid with a wire diameter of 0.4mm and an aperture of 1mm, The decomposition rate was calculated by measuring the amount of residue remaining. The experimental results are shown in Tables 1 to 7 below.

  In the above results, calcium chloride is the economical agent for the superabsorbent resin decomposing agent, but when the amount added exceeds 50% of the superabsorbent resin, an insoluble compound is precipitated in water. Since there is a concern about blocking the sewer pipe, the addition amount is preferably 40% or less. In addition, the decomposition agent for super absorbent resin of paper diaper composition has a higher decomposition function in the mixture of calcium chloride and malic acid than the mixture of calcium chloride and citric acid, and the synergistic effect of both is particularly excellent I found.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Stirrer tank 4 Cutter 4a Cutter shaft 4b Cutting blade 9 Stirrer 11 Decomposing agent addition device 12 Solid-liquid separation device

  The present invention relates to a method for treating used paper diapers and other used sanitary goods.

  In recent years, the use of disposable diapers for adults and childcare, mats for incontinence, and other sanitary products has been increasing to reduce the burden of nursing care and childcare. These hygiene products are composed of granular superabsorbent resin, finely divided cellulose, nonwoven fabric, adhesive tape, and strings, and 100 to 200 ml of infant manure is 300 to 400 ml for adults, but 50 to 200. Superabsorbent resin, which is said to have double water absorption capacity, absorbs and retains moisture in manure instantaneously in a network structure to form a gel-like solid, and fine cellulose absorbs moisture from the gel-like substance. To prevent the transition to.

  However, used paper diapers and other sanitary goods become heavy due to the high water-absorbing resin absorbing manure and are unsanitary and have a foul odor. Particularly in hospitals and nursing care facilities that consume a large amount of sanitary goods, a great deal of labor and cost are excessive.

  On the other hand, as shown in Patent Documents 1 and 2 above, steps such as addition of a decomposing agent or dehydrating agent that hydrolyzes the gelled superabsorbent resin, and is pulverized by a pulverizer, etc. After obtaining and separating into a solid component and a liquid component, a method of recovering the solid component and releasing the liquid component into sewage is known.

JP 2004-25574 A JP 2000-84533 A

  However, the inventions of the above Patent Documents 1 and 2 both require the separation of nonwoven fabrics and other solid materials, which are materials for paper diapers, from moisture. It requires equipment and labor to process. The recovery of the solid components in the decomposed products also has the purpose of reusing resources, but considering the recycling costs, the main reason is that if the decomposed products are discarded as sewage, the sewer pipes are clogged and clogged with solid components. Because. This problem is common to feminine sanitary products made of similar materials.

  The present invention provides a gelled superabsorbent resin and finely pulverizes the solid components of the non-woven fabric field and other sanitary ware materials to provide sufficient fluidity to the treated product, so that sewage can be discarded without clogging the sewer pipe. It is something to process.

The processing method of the present invention for solving the above-mentioned problems is as follows. First, used sanitary goods using a highly water-absorbent resin are hydrated, cut and pulverized, and the high swelled by the water of excreta. A method for treating used sanitary goods, wherein a hydrophilic agent of the water-absorbent resin or a decomposing agent that loses water retention capacity is added and mixed, and a cutting blade 4b that rotates the sanitary article material at a high speed during the pulverization process. Cut and finely pulverize, and further hydrolyze the finely pulverized product during the decomposition treatment, and add a decomposition agent comprising calcium chloride, calcium chloride and at least one of citric acid or malic acid, and mix by stirring. is characterized in that discharge into sewers without clogging the sewer pipe fluidity imparted possible a treated product that has been granted the flowable be discharged treated sewage with water by That.

Second , it is characterized by solid-liquid separation of a fluidized treatment product that can be discharged into the sewer, collecting the solid component, and discharging the liquid component into the sewer.

Third, having a plurality of cutting blades, and wherein the milling and cutting processes Trituration device 1 having a cutter shaft 4a of the high-speed rotation.

  According to the treatment method of the present invention configured as described above, the used sanitary ware is cut, pulverized and stirred under the addition of a hydrolyzed and gelled superabsorbent resin decomposing agent. Therefore, it becomes possible to discharge and discard the wastewater into the sewer without blocking the sewer. By the way, according to the Ministry of Land, Infrastructure, Transport and Tourism, recently, the development of sewage treatment plants has progressed and advanced effluent treatment of industrial wastewater has progressed and the population has decreased, so it is possible to accept these treatments. It is believed that.

  Sanitary products generated in large quantities, especially from hospitals, nursing homes and other large facilities, because it becomes possible to discharge and dispose of used sanitary products generated in large quantities as described above into sewers without solid-liquid separation. There is an advantage that labor costs such as waste separation processing, distribution / storage management and solid-liquid separation, equipment costs, and operating costs can be greatly reduced. In addition, the conventional incineration of sanitary ware waste is not necessary, and the furnace management and environmental pollution prevention measures associated with incineration are not necessary.

It is a schematic diagram of the flow of the processing method and apparatus used for the method of this invention. It is a flow schematic diagram of a processing method and a processing apparatus used when collect | recovering the solid component in the processed material hydrolyzed. (A) is a photograph showing the filtration state of the processed product to which the decomposition agent is not added after the pulverization treatment, and (B) is a photograph showing the filtration state when the decomposition agent is similarly added.

  FIG. 1 is a flow chart showing an outline of an apparatus for processing used sanitary goods (in this example, paper diapers are treated) according to the method of the present invention. In this example, the used paper diapers are added and cut and pulverized. A pulverizing apparatus (disposer) 1 and an agitation tank 2 for charging and decomposing water and a decomposing agent by introducing the pulverized processed material are provided.

  The crusher 1 supports a cutter shaft 4a coaxially in a cylindrical case 3 that is horizontally oriented and closed at both ends, and a number of cutting blades 4b project radially from the cutter shaft 4a. 4, and the cutter shaft 4a is rotated at a high speed of, for example, about 1425 rpm to 1725 rpm by a rotary drive (motor) 6 attached outside the case 3.

  In the upper part of the case 3, a paper diaper and a hopper 7 for supplying water are provided. The amount of water added at this time is about 5 to 10 times the weight of the paper diaper. The used used paper diaper is pulverized as much as possible with the cutter 4 in the water supplied (hydrated) in the case 3, and the cut and pulverized processed product flows together with moisture. It becomes a fluid and is sent to the stirring tank 2 below the lower discharge port 8.

  An agitator 9 for agitating the processed material is inserted and supported downward in the agitation tank 2, and the agitator 9 agitates the agitating blade 9b on the lower end side by a rotary drive device (motor) 9a on the upper end side. Stir. In addition, a decomposing agent for eliminating the gel by losing hydrophilicity or water holding power to the superabsorbent resin gelled by absorbing water in the used paper diaper on the stirring tank 2 is supplied. The decomposing agent addition apparatus 11 is installed. The decomposition agent is preferably about 0.2 to 2.0 times the weight of the paper diaper.

  Furthermore, in the agitation tank 2, water is further added to increase the moisture content of the treated product and to increase the dispersion and fluidity of the superabsorbent resin from which the gel has been eliminated. The amount of water added at this time is about 10 to 20 times the weight of the disposable diaper. By adding the hydrolyzed decomposing agent here, the gel-dissolved resin, the cut and crushed nonwoven fabric and other solid components, feces and urine are uniformly dispersed and mixed in water in a finely pulverized state.

  Since the treated product treated as described above has high fluidity, it is in a state where it can be discharged without sewage discharge and without clogging the sewer. Although an effect can also be expected, it is possible to deodorize by adding, for example, activated carbon, diatomaceous earth, diatom shale, bentonite, fumed silica, zeolite, etc., which are porous materials. About 5 wt% is desirable.

  The decomposition agent is blended in the form of minerals such as hydrochloric acid and sulfuric acid, or a mixture of one or more kinds of strong acid or weak acid salt of calcium, magnesium, aluminum, etc. as a powder or aqueous solution. The best form is a calcium or magnesium or aluminum metal strong acid or weak acid salt 10-80% and oxycarboxylic acid of succinic acid, lactic acid, butyric acid, citric acid, succinic acid, malic acid It is a mixture with 5 to 40% of one kind of organic acids such as acids or acetic acid, wood vinegar or bamboo vinegar.

  In view of efficient cutting and pulverization, imparting high fluidity and stirring efficiency, it is desirable that the pulverizer 1 and the agitator 2 are separately provided as shown in FIG. Stirring may be performed by once pulverizing the product, adding hydrolyzed and decomposed, and operating the pulverizer 1.

  FIG. 2 shows a pulverizing apparatus 1 and an agitating apparatus 2 that are the same as those in FIG. 1 for crushing and stirring used paper diapers (note: parts common to those in FIG. A known solid-liquid separation device 12 shown in Japanese Unexamined Patent Publication No. 2013-13556 etc. is installed, and a processed product in which the superabsorbent resin after stirring is decomposed is supplied to this device to separate the solid and liquid, and the separated water Can be discharged into sewage, and the collected solids can be used as recycled resources after recovery and used for other processing. Also in this case, the stirring tank 2 can be hydrated in order to impart higher fluidity to the treated product.

  Next, experimental results of the pulverization process of the superabsorbent resin used in the disposable diaper and the disposable diaper, which are the objects to be processed according to the present invention, and the decomposition process using the decomposition agent will be described.

1. Crushing and disassembling of disposable diapers In this experiment, as shown in FIGS. 3 (A) and 3 (B), commercially available unused baby diapers (P & G, product name “First skin best” 26g / sheet ) For 2 sheets, add 2 liters of tap water and cut and finely pulverize the processed material with a crusher (disposer for business use, rotation speed: 1425 rpm to 1725 rpm) for 1 min. The sieving process was performed for 1 minute, and the falling state from the mesh was confirmed.

  FIG. 3 (A) shows the case where no decomposing agent is added, and FIG. 3 (B) shows that 1% of calcium chloride 2 is 1% of the processed product obtained by pulverizing the decomposing agent blended at a ratio of malic acid 1. The case where it added is shown. As a result, in FIG. 3 (A), most of the processed material remains on the net, whereas in FIG. 3 (B), it can be confirmed that almost the entire amount has fallen into the beaker. It was confirmed that the formability and the entanglement between the fibers were almost lost and high fluidity was provided.

  In an actual used paper diaper, the deodorizing effect can be obtained at the same time by adding, for example, a mixture of a deodorizing liquid and diatomaceous earth to the decomposing agent when the decomposing agent is added.

2. Decomposition experiment of superabsorbent resin This experiment is for confirming the decomposability of various decomposing agents for gelled superabsorbent resin or their combination and blending ratio. Additive standard starch acrylate) to 1g, 200g of water was added to form a gel, and the decomposition agent was added and mixed, filtered through a grid with a wire diameter of 0.4mm and an aperture of 1mm, The decomposition rate was calculated by measuring the amount of residue remaining. The experimental results are shown in Tables 1 to 7 below.

  In the above results, calcium chloride is the economical agent for the superabsorbent resin decomposing agent, but when the amount added exceeds 50% of the superabsorbent resin, an insoluble compound is precipitated in water. Since there is a concern about blocking the sewer pipe, the addition amount is preferably 40% or less. In addition, the decomposition agent for super absorbent resin of paper diaper composition has a higher decomposition function in the mixture of calcium chloride and malic acid than the mixture of calcium chloride and citric acid, and the synergistic effect of both is particularly excellent I found.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Stirrer tank 4 Cutter 4a Cutter shaft 4b Cutting blade 9 Stirrer 11 Decomposing agent addition device 12 Solid-liquid separation device

  The present invention relates to a method for treating used paper diapers and other used sanitary goods.

  In recent years, the use of disposable diapers for adults and childcare, mats for incontinence, and other sanitary products has been increasing to reduce the burden of nursing care and childcare. These hygiene products are composed of granular superabsorbent resin, finely divided cellulose, nonwoven fabric, adhesive tape, and strings, and 100 to 200 ml of infant manure is 300 to 400 ml for adults, but 50 to 200. Superabsorbent resin, which is said to have double water absorption capacity, absorbs and retains moisture in manure instantaneously in a network structure to form a gel-like solid, and fine cellulose absorbs moisture from the gel-like substance. To prevent the transition to.

  However, used paper diapers and other sanitary goods become heavy due to the high water-absorbing resin absorbing manure and are unsanitary and have a foul odor. Particularly in hospitals and nursing care facilities that consume a large amount of sanitary goods, a great deal of labor and cost are excessive.

  On the other hand, as shown in Patent Documents 1 and 2 above, steps such as addition of a decomposing agent or dehydrating agent that hydrolyzes the gelled superabsorbent resin, and is pulverized by a pulverizer, etc. After obtaining and separating into a solid component and a liquid component, a method of recovering the solid component and releasing the liquid component into sewage is known.

JP 2004-25574 A JP 2000-84533 A

  However, the inventions of the above Patent Documents 1 and 2 both require the separation of nonwoven fabrics and other solid materials, which are materials for paper diapers, from moisture. It requires equipment and labor to process. The recovery of the solid components in the decomposed products also has the purpose of reusing resources, but considering the recycling costs, the main reason is that if the decomposed products are discarded as sewage, the sewer pipes are clogged and clogged with solid components. Because. This problem is common to feminine sanitary products made of similar materials.

  The present invention provides a gelled superabsorbent resin and finely pulverizes the solid components of the non-woven fabric field and other sanitary ware materials to provide sufficient fluidity to the treated product, so that sewage can be discarded without clogging the sewer pipe. It is something to process.

  The processing method of the present invention for solving the above-mentioned problems is as follows. First, used sanitary goods using a highly water-absorbent resin are hydrated, cut and pulverized, and the high swelled by the water of excreta. A method for treating used sanitary goods, wherein a hydrophilic agent of the water-absorbent resin or a decomposing agent that loses water retention capacity is added and mixed, and a cutting blade 4b that rotates the sanitary article material at a high speed during the pulverization process. Cut and finely pulverize, and further hydrolyze the finely pulverized product during the decomposition treatment, and add a decomposition agent comprising calcium chloride, calcium chloride and at least one of citric acid or malic acid, and mix by stirring. By providing the fluidity that can be discharged into the sewer without clogging the sewer pipe, the treated product provided with the fluidity is discharged into the sewer together with moisture. That.

Second, having a plurality of cutting blades, and wherein the milling and cutting processes Trituration device 1 having a cutter shaft 4a of the high-speed rotation.

  According to the treatment method of the present invention configured as described above, the used sanitary ware is cut, pulverized and stirred under the addition of a hydrolyzed and gelled superabsorbent resin decomposing agent. Therefore, it becomes possible to discharge and discard the wastewater into the sewer without blocking the sewer. By the way, according to the Ministry of Land, Infrastructure, Transport and Tourism, recently, the development of sewage treatment plants has progressed and advanced effluent treatment of industrial wastewater has progressed and the population has decreased, so it is possible to accept these treatments. It is believed that.

  Sanitary products generated in large quantities, especially from hospitals, nursing homes and other large facilities, because it becomes possible to discharge and dispose of used sanitary products generated in large quantities as described above into sewers without solid-liquid separation. There is an advantage that labor costs such as waste separation processing, distribution / storage management and solid-liquid separation, equipment costs, and operating costs can be greatly reduced. In addition, the conventional incineration of sanitary ware waste is not necessary, and the furnace management and environmental pollution prevention measures associated with incineration are not necessary.

It is a schematic diagram of the flow of the processing method and apparatus used for the method of this invention. It is a flow schematic diagram of a processing method and a processing apparatus used when collect | recovering the solid component in the processed material hydrolyzed. (A) is a photograph showing the filtration state of the processed product to which the decomposition agent is not added after the pulverization treatment, and (B) is a photograph showing the filtration state when the decomposition agent is similarly added.

  FIG. 1 is a flow chart showing an outline of an apparatus for processing used sanitary goods (in this example, paper diapers are treated) according to the method of the present invention. In this example, the used paper diapers are added and cut and pulverized. A pulverizing apparatus (disposer) 1 and an agitation tank 2 for charging and decomposing water and a decomposing agent by introducing the pulverized processed material are provided.

  The crusher 1 supports a cutter shaft 4a coaxially in a cylindrical case 3 that is horizontally oriented and closed at both ends, and a number of cutting blades 4b project radially from the cutter shaft 4a. 4, and the cutter shaft 4a is rotated at a high speed of, for example, about 1425 rpm to 1725 rpm by a rotary drive (motor) 6 attached outside the case 3.

  In the upper part of the case 3, a paper diaper and a hopper 7 for supplying water are provided. The amount of water added at this time is about 5 to 10 times the weight of the disposable diaper. The used used paper diaper is pulverized as much as possible with the cutter 4 in the water supplied (watered) in the case 3, and the cut and pulverized processed product flows together with moisture. It becomes a fluid and is sent to the stirring tank 2 below the lower discharge port 8.

  An agitator 9 for agitating the processed material is inserted and supported downward in the agitation tank 2, and the agitator 9 agitates the agitating blade 9b on the lower end side by a rotary drive device (motor) 9a on the upper end side. Stir. In addition, a decomposing agent for eliminating the gel by losing hydrophilicity or water holding power to the superabsorbent resin gelled by absorbing water in the used paper diaper on the stirring tank 2 is supplied. The decomposing agent addition apparatus 11 is installed. The decomposition agent is preferably about 0.2 to 2.0 times the weight of the paper diaper.

  Furthermore, in the agitation tank 2, water is further added to increase the moisture content of the treated product and to increase the dispersion and fluidity of the superabsorbent resin from which the gel has been eliminated. The amount of water added at this time is about 10 to 20 times the weight of the disposable diaper. By adding the hydrolyzed decomposing agent here, the gel-dissolved resin, the cut and crushed nonwoven fabric and other solid components, feces and urine are uniformly dispersed and mixed in water in a finely pulverized state.

  Since the treated product treated as described above has high fluidity, it is in a state where it can be discharged without sewage discharge and without clogging the sewer. Although an effect can also be expected, it is possible to deodorize by adding, for example, activated carbon, diatomaceous earth, diatom shale, bentonite, fumed silica, zeolite, etc., which are porous materials. About 5 wt% is desirable.

  The decomposition agent is blended in the form of minerals such as hydrochloric acid and sulfuric acid, or a mixture of one or more kinds of strong acid or weak acid salt of calcium, magnesium, aluminum, etc. as a powder or aqueous solution. The best form is a calcium or magnesium or aluminum metal strong acid or weak acid salt of 10 to 80% and oxycarboxylic acid of succinic acid, lactic acid, butyric acid, citric acid, succinic acid, malic acid It is a mixture with 5 to 40% of one kind of organic acids such as acids or acetic acid, wood vinegar or bamboo vinegar.

  In view of efficient cutting and pulverization, imparting high fluidity and stirring efficiency, it is desirable that the pulverizer 1 and the agitator 2 are separately provided as shown in FIG. Stirring may be performed by once pulverizing the product, adding hydrolyzed and decomposed, and operating the pulverizer 1.

  FIG. 2 shows a pulverizing apparatus 1 and an agitating apparatus 2 that are the same as those in FIG. 1 for crushing and stirring used paper diapers (note: parts common to those in FIG. A known solid-liquid separation device 12 shown in Japanese Unexamined Patent Publication No. 2013-13556 etc. is installed, and a processed product in which the superabsorbent resin after stirring is decomposed is supplied to this device to separate the solid and liquid, and the separated water Can be discharged into sewage, and the collected solids can be used as recycled resources after recovery and used for other processing. Also in this case, the stirring tank 2 can be hydrated in order to impart higher fluidity to the treated product.

  Next, experimental results of the pulverization process of the superabsorbent resin used in the disposable diaper and the disposable diaper, which are the objects to be processed according to the present invention, and the decomposition process using the decomposition agent will be described.

1. Crushing and disassembling of disposable diapers In this experiment, as shown in FIGS. 3 (A) and 3 (B), commercially available unused baby diapers (P & G, product name “First skin best” 26g / sheet ) For 2 sheets, add 2 liters of tap water and cut and finely pulverize the processed material with a crusher (disposer for business use, rotation speed: 1425 rpm to 1725 rpm) for 1 min. The sieving process was performed for 1 minute, and the falling state from the mesh was confirmed.

  FIG. 3 (A) shows the case where no decomposing agent is added, and FIG. 3 (B) shows that 1% of calcium chloride 2 is 1% of the processed product obtained by pulverizing the decomposing agent blended at a ratio of malic acid 1. The case where it added is shown. As a result, in FIG. 3 (A), most of the processed material remains on the net, whereas in FIG. 3 (B), it can be confirmed that almost the entire amount has fallen into the beaker. It was confirmed that the formability and the entanglement between the fibers were almost lost and high fluidity was provided.

  In an actual used paper diaper, the deodorizing effect can be obtained at the same time by adding, for example, a mixture of a deodorizing liquid and diatomaceous earth to the decomposing agent when the decomposing agent is added.

2. Decomposition experiment of superabsorbent resin This experiment is for confirming the decomposability of various decomposing agents for gelled superabsorbent resin or their combination and blending ratio. Additive standard starch acrylate) to 1g, 200g of water was added to form a gel, and the decomposition agent was added and mixed, filtered through a grid with a wire diameter of 0.4mm and an aperture of 1mm, The decomposition rate was calculated by measuring the amount of residue remaining. The experimental results are shown in Tables 1 to 7 below.

  In the above results, calcium chloride is the economical agent for the superabsorbent resin decomposing agent, but when the amount added exceeds 50% of the superabsorbent resin, an insoluble compound is precipitated in water. Since there is a concern about blocking the sewer pipe, the addition amount is preferably 40% or less. In addition, the decomposition agent for super absorbent resin of paper diaper composition has a higher decomposition function in the mixture of calcium chloride and malic acid than the mixture of calcium chloride and citric acid, and the synergistic effect of both is particularly excellent I found.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Stirrer tank 4 Cutter 4a Cutter shaft 4b Cutting blade 9 Stirrer 11 Decomposing agent addition device 12 Solid-liquid separation device

Claims (6)

  Adds and mixes pulverization treatment that cuts and pulverizes the product into used hygiene products using a superabsorbent resin and a decomposing agent that loses the hydrophilicity or water retention of the superabsorbent resin swollen by the water of excreta The used sanitary goods processing method which performs the decomposition process which performs the said disintegration process, Comprising: The flow which can be discharged | emitted to a sewer by cut | disconnecting and pulverizing the raw material of sanitary goods with the cutting blade (4b) which rotates at high speed in the said process Disposal of used sanitary goods that imparts sex.   The processing method of used sanitary goods according to claim 1, wherein the fluidity of the highly water-absorbent resin by fine pulverization is set to 70% or more in terms of the decomposition rate by the permeation amount when filtered through a 1 mm mesh grid.   The method for treating used sanitary goods according to claim 1 or 2, wherein the finely pulverized processed product is added with stirring and mixed, and the processed product is discharged into a sewer together with moisture.   The processing method of the used sanitary goods of Claim 1 or 2 which solid-liquid separates the finely pulverized processed material, collect | recovers a solid component, and discharges | emits a liquid component to a sewer.   Decomposing agent for gel-like solid of super absorbent resin is aluminum sulfate, aluminum chloride, iron chloride, iron sulfate, copper sulfate, copper chloride, zinc chloride, zinc sulfate or other light metal chloride or sulfate or acetic acid, oxalic acid, Lactic acid, butyric acid, citric acid, wood vinegar, bamboo vinegar and other organic acids or hydrochloric acid, sulfuric acid and other minerals or salt, calcium, magnesium, aluminum strong acid or weak acid salts alone or a mixture of two or more, decompose The processing method of used sanitary goods according to any one of claims 1 to 4, wherein the added amount of the agent is 20 to 200 wt% with respect to the amount of the superabsorbent resin in the processed product.   The used hygiene according to any one of claims 1 to 5, wherein the processed product is cut and finely pulverized by a pulverizing apparatus (1) having a plurality of cutting blades and having a cutter shaft (4a) rotating at high speed. How to handle supplies.