JP2000279937A - Treatment of garbage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the load on the environment by effectively and efficiently utilizing garbage. SOLUTION: After the garbage or waste water containing the garbage is dehydrated, a liquid component is used as the production raw material for biodegradable plastics. In such a case, a means capable of taking out the moisture included in the internal structure of the solid garbage by pressurizing the garbage like compression by a belt press is preferable as the means for dehydration. Further, the garbage or the waste water containing the garbage is once subjected to the removal of the moisture sticking to the surface layer of the garbage solid content by operation, such as gravity settlement or floatation, then to a solubilization treatment by a physical treatment, such as homogeneizing, a chemical treatment, such as chemical addition, and a heat treatment, etc., by which part or the whole of the garbage is liquefied. The liquid component after the solubilization is used as the production raw material for the biodegradable plastics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for treating kitchen waste.

[0002]

2. Description of the Related Art Conventionally, kitchen waste generated in schools, restaurants, schools and hospitals, etc., as shown in FIG. 1, is collected by a garbage truck or the like and then disposed of by landfilling or incineration. Processing such as fermenting kitchen refuse using the action of microorganisms and composting it has been common.

[0003]

However, in the above-mentioned treatment method, it has become difficult to secure a space for a landfill disposal site, and recently, garbage has reduced the combustion temperature of an incinerator. , It is a cause of the generation of highly toxic dioxin, and it takes a long time to compost, and even if composting is used, it is eventually disposed of as waste because its use is limited. There were various problems.

On the other hand, in order to solve the above-mentioned problems, a method of pulverizing kitchen garbage with a disposer or the like and then using the liquid as a raw material for producing biodegradable plastics has been considered. Are sparse, and the production efficiency is low.

An object of the present invention is to solve the above problems by effectively and efficiently using kitchen waste to reduce the burden on the environment.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is to dehydrate and solubilize kitchen garbage and use the liquid as a raw material for producing biodegradable plastic.

The method for treating kitchen waste according to claim 1 is characterized in that kitchen waste or wastewater containing kitchen waste is selectively separated, and the separated component is used as a raw material for producing biodegradable plastic. The rate of disposal is lower,
It can be expected to reduce the burden on the environment and increase the production efficiency of biodegradable plastics.

According to a second aspect of the present invention, there is provided a method for treating kitchen garbage, wherein the kitchen garbage or waste water containing the kitchen garbage is dewatered, and the desorbed liquid is used as a raw material for producing biodegradable plastic. Can be expected.

According to a third aspect of the present invention, the garbage or waste water containing the garbage is once separated into solid and liquid by solid-liquid separation, and then the solid is further dehydrated to remove the desorbed liquid by biodegradability. By using it as a raw material for producing plastic, the same contents as in claim 1 can be expected.

According to a fourth aspect of the present invention, after the garbage or waste water containing the garbage is once solubilized to liquefy part or all of the garbage, the solubilized liquid is used to produce biodegradable plastic. By using it as a raw material, the same content as in claim 1 can be expected.

According to a fifth aspect of the present invention, the garbage or waste water containing the garbage is once separated into solid and liquid by solid-liquid separation, and then the solid is solubilized to remove a part or all of the garbage. By liquefying and using the liquid after solubilization as a raw material for producing biodegradable plastic, the same contents as in claim 1 can be expected.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the following examples in order to make it easier to understand the present invention.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, the contents of claim 1 selectively separate kitchen waste or wastewater containing kitchen waste and use the separated components as a raw material for producing biodegradable plastic. is there. By selectively separating the components, the production of the biodegradable plastic becomes efficient.

According to the second aspect, as shown in FIG. 3, after the garbage or waste water containing the garbage is dehydrated, the liquid is used as a raw material for producing biodegradable plastic. By dehydration operation, organic components and the like that remain in the solid content and become a raw material of the biodegradable plastic are moved into the liquid component, and the concentration in the liquid component is increased, thereby producing the biodegradable plastic. Is more efficient. In this case, any means may be used as a means for dewatering, but it is preferable to use means such as pressing with a belt press that can pressurize the garbage and also remove moisture contained in the internal structure of the solid garbage. . Even if the solid content after dehydration is treated by a conventional method, the dehydration reduces the amount of waste disposal.

Further, as shown in FIG. 4, the contents of the garbage or the waste water containing the garbage are once removed from the surface layer of the garbage solids by an operation such as gravity sedimentation or floating separation as shown in FIG. Thereafter, the solid content is further dehydrated by pressure or the like, and the desorbed liquid is used as a raw material for producing biodegradable plastic. As a result, a liquid having a high raw material concentration can be obtained without requiring a large amount of energy and cost as in the case of heat concentration, and the efficiency of biodegradable plastic production can be improved.

As shown in FIG. 5, kitchen waste or waste water containing kitchen waste is solubilized by physical treatment such as homogenization, chemical treatment such as addition of chemicals, or heat treatment. After partially or entirely liquefying, the solubilized liquid is used as a raw material for producing biodegradable plastic. As a result, a liquid having a higher concentration of the raw material can be obtained, so that the efficiency of biodegradable plastic production can be further improved.

Further, as shown in FIG. 6, water attached to the surface layer of the solid garbage is removed from the garbage or the waste water containing the garbage by an operation such as gravity sedimentation or floating separation as shown in FIG. After that, physical treatment such as homogenization, chemical treatment such as addition of chemicals, solubilization treatment by heat treatment, etc., liquefy part or all of the kitchen garbage, and use the solubilized liquid as a raw material for producing biodegradable plastics Things.
As a result, a liquid having a higher concentration of the raw material can be obtained, so that the efficiency of biodegradable plastic production can be further improved.

The embodiment described above is merely an embodiment using the content of the present invention, and can take other forms within the scope of using the content of the present invention, and is not intended to limit the content of the present invention. Absent.

[0019]

As described above, according to the present invention, the load on the environment can be reduced by effectively and efficiently using kitchen waste.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a conventional kitchen waste disposal method.

FIG. 2 is a configuration diagram illustrating a method of treating kitchen garbage according to an embodiment of the present invention.

FIG. 3 is a configuration diagram illustrating a method of treating kitchen garbage according to another embodiment of the present invention.

FIG. 4 is a configuration diagram illustrating a method of treating kitchen garbage according to another embodiment of the present invention.

FIG. 5 is a configuration diagram illustrating a method of treating kitchen garbage according to another embodiment of the present invention.

FIG. 6 is a configuration diagram illustrating a method of treating kitchen garbage according to another embodiment of the present invention.

Claims (5)

[Claims] 1. A method for treating garbage, comprising selectively separating garbage or wastewater containing garbage, and using the separated component as a raw material for producing biodegradable plastic. 2. A method for treating kitchen garbage, comprising dewatering kitchen garbage or wastewater containing kitchen garbage, and using the desorbed liquid as a raw material for producing biodegradable plastic. 3. After the garbage or waste water containing the garbage is once separated into solids and liquids by solid-liquid separation, the solids are further dehydrated, and the desorbed liquid is used as a raw material for producing biodegradable plastics. A method of treating kitchen waste. 4. A method of producing garbage, wherein the garbage or waste water containing the garbage is once solubilized to liquefy part or all of the garbage, and the liquid is used as a raw material for producing biodegradable plastic. Processing method. 5. After the garbage or waste water containing the garbage is once separated into solids and liquids by solid-liquid separation, the solids are solubilized to liquefy part or all of the garbage, and the liquids are separated. A method for treating kitchen waste, which is used as a raw material for producing biodegradable plastics.