| abstract |
PROBLEM TO BE SOLVED: To anaerobically digest organic compounds such as plastics contained in organic waste, which are not suitable for anaerobic digestion, by converting them into soluble organic substances, thereby efficiently generating methane gas. Provided is a method for treating organic waste that does not require incineration equipment for organic substances such as plastics that are not suitable for anaerobic digestion and does not generate dioxins. SOLUTION: A first slurrying step of converting a solid organic waste slurry such as kitchen waste into a slurry, and a fermentation-unsuitable substance which is provided during or before or after the first slurry-forming step and separates plastic which is unfit for fermentation. A separation step, an anaerobic digestion step of anaerobic digestion of the slurry from the first slurrying step from which the plastic has been removed, and a slurry with water by crushing the plastic separated in the fermentation unsuitable substance separation step. A second slurrying step, a solubilizing step of partially decomposing the slurry from the second slurrying step by wet oxidation, and a solubilizing liquid returning step of supplying the solubilizing solution from the solubilizing step to the anaerobic digestion step. Organic waste treatment method provided. |