Structural Changes of Oil Palm Empty Fruit Bunch (OPEFB) after Fungal and Phosphoric Acid Pretreatment

Molecules

Isroi¹  Mofoluwake M. Ishola¹  Ria Millati¹  Siti Syamsiah¹  Muhammad N. Cahyanto¹  Claes Niklasson¹ 

[1] ¹Department of Biotechnology, Graduate School of Gadjah Mada University, 55281 Yogyakarta, Indonesia

关键词: cellulose I_b;    crystallinity;    digestibility;    FTIR spectra;    hydrogen bond;    oil palm empty fruit bunch;    phosphoric acid;    Pleurotus floridanus;    pretreatment;   

DOI  :  10.3390/molecules171214995

来源: mdpi

【 摘 要 】

Oil palm empty fruit bunch (OPEFB) was pretreated using white-rot fungus Pleurotus floridanus, phosphoric acid or their combination, and the results were evaluated based on the biomass components, and its structural and morphological changes. The carbohydrate losses after fungal, phosphoric acid, and fungal followed by phosphoric acid pretreatments were 7.89%, 35.65%, and 33.77%, respectively. The pretreatments changed the hydrogen bonds of cellulose and linkages between lignin and carbohydrate, which is associated with crystallinity of cellulose of OPEFB. Lateral Order Index (LOI) of OPEFB with no pretreatment, with fungal, phosphoric acid, and fungal followed by phosphoric acid pretreatments were 2.77, 1.42, 0.67, and 0.60, respectively. Phosphoric acid pretreatment showed morphological changes of OPEFB, indicated by the damage of fibre structure into smaller particle size. The fungal-, phosphoric acid-, and fungal followed by phosphoric acid pretreatments have improved the digestibility of OPEFB’s cellulose by 4, 6.3, and 7.4 folds, respectively.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.