Comparison of alkaline- and fungi-assisted wet-storage of corn stover.
Storage of lignocellulosic biomass is critical for a year-round supply of feedstock for a biorefinery. Compared with dry storage, wet storage is a promising alternative technology, providing several advantages including reduced dry matter loss and fire risk and improved feedstock digestibility after storage. This study investigated the concurrent pretreatment and wet-storage of corn stover with the assistance of NaOH or a lignin-degrading fungus, Ceriporiopsis subvermispora, during a 90-d period. Compared with ensilage, adding NaOH or inoculation with C. subvermispora significantly enhanced the enzymatic degradability of corn stover by 2-3-fold after 90-d wet storage. Lignin and xylan removal during NaOH pretreatment and wet-storage were influenced by NaOH loading and moisture. NaOH pretreatment retarded the production of organic acids during storage and the acetate release correlated with lignin and xylan removal. Further study is needed to reduce cellulose degradation during the late stage of fungal treatment.
Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave, Wooster, OH 44691-4096, USA.
Zhifang
Z
Cui
Jian
J
Shi
Caixia
C
Wan
Yebo
Y
Li
D000085:Acetates / Q000032:analysis; D018533:Biomass; D002241:Carbohydrates / Q000032:analysis; D055453:Coriolaceae / Q000187:drug effects / Q000378:metabolism*; D005232:Fatty Acids, Volatile / Q000032:analysis; D006813:Humidity; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D011309:Preservation, Biological; D012972:Sodium Hydroxide / Q000494:pharmacology*; D014866:Waste Products / Q000032:analysis*; D003313:Zea mays / Q000737:chemistry*
D000085:Acetates; D002241:Carbohydrates; D005232:Fatty Acids, Volatile; D014866:Waste Products; D012972:Sodium Hydroxide