초록
<P><B>Abstract</B></P> <P>This study investigated the effect of combination of pretreatment methods such as ultra-sonication and electrolysis for the minimum energy input to recover the maximal carbohydrate and solubilization (in terms of sCOD) from mixed microalgae biomass. The composition of the soluble chemical oxygen demand (COD), protein, carbohydrate revealed that the hydrolysis method had showed positive impact on the increasing quantity and thus enhanced methane yields. As a result, the combination of these 2 pretreatments showed the greatest yield of soluble protein and carbohydrate as 279 and 309mg/L, which is the recovery of nearly 85 and 90% in terms of total content of them. BMP tests showed peak methane production yield of 257mL/gVS<SUB>added</SUB>, for the hydrolysate of combined pretreatment as compared to the control experiment of 138mL/gVS added.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Combination of ultrasonication and electrolysis pretreatment was evaluated. </LI> <LI> Peak recovery of soluble protein and carbohydrate were 279 and 309mg/L. </LI> <LI> BMP tests showed peak methane production performance as 257mL/gVS added. </LI> </UL> </P>