SYSTEM FOR PRODUCING BIOGAS USING SUBSTITUTION REACTION IN PRETREATMENT PROCESS OF ANAEROBIC FERMENTATION TO IMPROVE BIOGAS PRODUCTION FROM ORGANIC WASTES, PRODUCTION METHOD THEREOF AND BIOGAS PRODUCED BY THE METHOD

摘要

Provided are a system for producing biogas using a substitution reaction in a pretreatment process of anaerobic fermentation to improve biogas production from organic wastes and a production method. The biogas production system comprises a first fermentation tank for fermenting organic wastes including wastewater sludge, food waste and livestock manure; a substitution tank connected to the first fermentation tank to receive matured organic wastes or unmatured organic wastes in an initial state and to conduct a substitution reaction; and an anaerobic fermentation tank connected to the substitution tank to generate biogas by fermenting polymeric organic matters and to supply the generated biogas to the substitution tank. [Reference numerals] (11) First fermentation tank; (13) Substitution tank; (15) Anaerobic fermentation tank; (17) Filtrate tank; (19) Energy conversion tank; (AA,BB) Maturation, Supply; (CC) Biogas