... internal digester, prolong its lifespan, and also creates a complete oxygen-free room for anaerobic microorganisms to do fermentation, which in ... increases the biogas output ratio.2. Process flow of methane generator 3. Explaination of Flow(1)The daily dung-dirt through ... tank has a lot of advantages.4.Advantages of methane generator (1)Airproof performanceSealant is unnecessary, for it is of excellent ...