초록
<P><B>Abstract</B></P> <P> <I>Agave</I> bagasse is a lignocellulosic agroindustrial waste suitable for biofuel production. This study aimed to compare biological, enzymatic, chemical, and hydrothermal pretreatments applied to <I>Agave</I> bagasse in terms of solubilization of carbohydrates (CHO) and chemical oxygen demand (COD), as well as the biochemical methane potential (BMP) from hydrolyzates. Most pretreatments behave similarly, with an average yield of 0.16 ± 0.02 g<SUB>COD</SUB>/g, only the chemical pretreatment overcame this yield by a factor of 2.6 with a CHO/COD ratio of 0.95. The concentrations of inhibitors – furfural, hydroxymethylfurfural, and phenols – were higher in the chemical hydrolyzates than in the biological and enzymatic hydrolyzates. BMP from most hydrolyzates was the same, on average 219 ± 15 mL/g<SUB>CODin</SUB>, hydrolyzates differentiate only in terms of lag phase and the methane production rates.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Four pretreatments were compared in terms of solubilization and methane production. </LI> <LI> Dilute acid pretreatment reached the highest solubilization of organic matter. </LI> <LI> Hydrolyzates differentiate only in terms of lag phase and the methane production rate. </LI> <LI> Most hydrolyzates reached the same biochemical methane potential of 219 mL CH<SUB>4</SUB>/g<SUB>COD</SUB>. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>