Comparison of alkaline- and fungi-assisted wet-storage of corn stover

Zhifang Cui, Jian Shi, Caixia Wan, Yebo Li

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)98-104
Number of pages7
JournalBioresource Technology
Volume109
DOIs
StatePublished - Apr 2012

Bibliographical note

Funding Information:
This work was supported by funding from North Central Sun Grant Program (No. GRT00013735) and Ohio Agricultural Research Development Center (OARDC) SEEDS grant. The authors would like to thank Mrs. Mary Wicks (Department of Food, Agricultural and Biological Engineering, OSU) for reading through the manuscript and providing useful suggestions.

Keywords

  • Biofuel
  • Ceriporiopsis subvermispora
  • Corn stover
  • Pretreatment
  • Wet storage

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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