Waste treatment system and waste treatment method

A waste treatment system for performing a hydrothermal treatment of wastes, the system comprising:

• a first hydrothermal treatment device for performing a first hydrothermal treatment by bringing steam into contact with the wastes, the first hydrothermal treatment device including a housing in which the first hydrothermal treatment is performed, a slot through which the wastes are loaded into the housing, a steam supply port through which the steam is injected into the housing, and a reactant discharge port through which a reactant of the first hydrothermal treatment is discharged from the housing;
• a methane fermentation device for performing methane fermentation of a liquid of the reactant of the first hydrothermal treatment to generate a biogas;
• a second hydrothermal treatment device for performing a second hydrothermal treatment by bringing steam into contact with solids in a fermented matter obtained in the methane fermentation device;
• a first storage facility for storing a solid fuel produced from each of solids of the reactant of the first hydrothermal treatment and solids of a reactant of the second hydrothermal treatment;
• a second storage facility for storing the biogas;
• and
• at least one steam generation device for generating the steam to be supplied to the first and second hydrothermal treatment devices,
• wherein the steam generation device is configured to generate the steam by using the solid fuel stored in the first storage facility or a combustion energy generated by combustion of the biogas stored in the second storage facility.

A waste treatment system for performing a hydrothermal treatment of wastes, the system comprising:

• a first hydrothermal treatment device for performing a first hydrothermal treatment by bringing steam into contact with the wastes, the first hydrothermal treatment device including a housing in which the first hydrothermal treatment is performed, a slot through which the wastes are loaded into the housing, a steam supply port through which the steam is injected into the housing, and a reactant discharge port through which a reactant of the first hydrothermal treatment is discharged from the housing;
• a second hydrothermal treatment device for performing a second hydrothermal treatment of wastes containing a resin, or containing an oil and a fat;
• a fuel production device for producing a solid fuel from each of solids of the reactant of the first hydrothermal treatment and solids of a reactant of the second hydrothermal treatment;
• a first storage facility for storing the solid fuel;
• and
• at least one steam generation device for generating the steam to be supplied to the first and second hydrothermal treatment devices,
• wherein the steam generation device is configured to generate the steam by using a combustion energy generated by combustion of the solid fuel stored in the first storage facility, and the fuel production device includes a drying device for drying the solids of the reactants of the first and second hydrothermal treatments.

A waste treatment system for performing a hydrothermal treatment of wastes, the system comprising:

• at least one hydrothermal treatment device for performing the hydrothermal treatment by bringing steam into contact with the wastes, the at least one hydrothermal treatment device including a housing in which the hydrothermal treatment is performed, a slot through which the wastes are loaded into the housing, a steam supply port through which the steam is injected into the housing, and a reactant discharge port through which a reactant of the hydrothermal treatment is discharged from the housing;
• at least one storage facility for storing a fuel produced from the reactant of the hydrothermal treatment;
• and
• at least one steam generation device for generating the steam to be supplied to the at least one hydrothermal treatment device,
• wherein the at least one steam generation device is configured to generate the steam by using a combustion energy generated by combustion of the fuel stored in the at least one storage facility.