Abstract:By investigating the effects of pretreatment temperature and pH of waste fermented mycelia on TS and VS dissolution rate as well as the concentrations of SCOD,proteins,carbohydrates and ammonia nitrogen in its pretreated supernatant,some useful information could be provided for the production of short-chain volatile fatty acids(SCFAs) form waste mycelia.The results indicated that the higher pretreatment temperature and pH were beneficial to TS and VS dissolution.And,the concentrations of SCOD,proteins,carbohydrates and ammonia nitrogen were higher.When the pretreatment temperature kept constant(90 ℃),the pretreatment pH values had greater impact on SCFAs production.SCFAs concentration achieved its peak with 8.01 g/L when the pH value was 5.0,and the main component of SCFAs was acetate at any pH values.SCFAs production was less effective when the pH value was neutral(7.0),which may due to the inhibitory effect of higher ammonia concentration on the activity of anaerobic acidogenesis microorganisms.
