Biotransformation of Tropical Lignocellulosic Feedstock Using the Brown rot Fungus Serpula lacrymans
2020
Nurika, Irnia | Suhartini, Sri | Barker, Guy C.
Agricultural residues, especially tropical biomass feedstock are a potentially sustainable source for the production of biorefinery products but these have different characteristic due to their specific lignocellulosic structures. Lignocellulosic pretreatment is a key step for the economic production of value added chemicals as the breakdown of cell walls can increase accessibility to the cellulose, hemicellulose and lignin. Fungi provide natures solution to this problem through their novel enzymes. The brown rot Serpula lacrymans differs from other fungi as it utilises both enzymatic and non enzymatic Fenton reaction to generates hydroxyl radical and disrupt the recalcitrant structure of lignocellulose. In this study we compared changes in rice straw, cacao pod, corn cobs, corn leaves and sugarcane bagasse following conversion by this unusual fungus. This study revealed that the highest total soluble phenols (0.140 mg g⁻ ¹) was obtained from the extract of rice straw solid state fermentation while corn leaves produced high amount of total reducing sugars (207.37 mg g⁻ ¹), both of which were reached at 21 days cultured. The results of scanning electronic microscopy test emphasised the distinct changed on structural transformation of substrates before and after pretreatment. These finding indicate that the fungus Serpula lacrymans has a particular mode of action which has high potential application in bioconversion of lignocellulosic feedstock.
显示更多 [+] 显示较少 [-]