System for disposal of waste containing food waste or livestock manure and production of energy and method therefor

A system for disposal of waste containing food waste or livestock manure and production of energy, the system comprising:

• an inlet hopper through which waste containing waste food or livestock manure are put inside, wherein the waste food contains solid organic substances;
• a separator that is disposed at the bottom of the inlet hopper, wherein the separator selectively removes non-flammable substances and inorganic substances from the waste put inside through the inlet hopper;
• a crusher that crushes the waste with the non-flammable substances and inorganic substances removed into a predetermined size or less;
• a multistage centrifugal separator that separates the crushed waste from wastewater step by step at different rotational speeds in accordance with sizes of the solid organic substances in the crushed waste;
• an organism tank that collects the solid organic substances separated from the waste through the multistage centrifugal separator;
• a sawdust supplier that supplies sawdust;
• a mixing heater that uniformly mixes the solid organic substances kept in the organism tank with the sawdust supplied from the sawdust supplier and produces an organic mixture by heating the solid organic substances and the sawdust at a predetermined temperature;
• a solid fuel producing machine, wherein the solid fuel producing machine produces a solid fuel by pelletizing or briquetting the organic mixture produced by the mixing heater;
• a first filter that primarily removes solid organic substances and impurities from the wastewater separated by the multistage centrifugal separator;
• a bubble generator that produces gas and bubbles by electrolyzing the wastewater passing through the first filter;
• a second filter that secondarily removes solid organic substances and impurities from the wastewater remaining in the bubble generator;
• and
• a combustion furnace that is supplied with the gas and the bubbles produced by the bubble generator and water with impurities secondarily removed through the second filter, and then burns the gas and the bubbles and produces vapor by heating the water with impurities removed.