Anaerobic fermentation of biogas liquid pretreated maize straw by rumen microorganisms in vitro

Bioresour Technol. 2014 Feb:153:8-14. doi: 10.1016/j.biortech.2013.10.003. Epub 2013 Oct 10.

Abstract

This study intended to investigate the effect of pretreatment of maize straw with biogas liquid on followed fermentation by rumen microorganisms in vitro. The multiple effects including treated time, temperature and dosage of biogas liquid in pretreatment on the followed fermentation performance were analyzed by orthogonal array. The optimum conditions of pretreatment were 9days, 25°C and 50% (v/w) dosage of biogas liquid, which were indicated by the corresponding crystallinity index, dry matter digestibility (DMD) and acetate limiting-step concentration were 57.5%, 73.76% and 1756mg/L, respectively. The ordering sequence of the influential factors for pretreatment was treated time > temperature > dosage of biogas liquid. The results of fermentation showed that the maize straw pretreated by biogas liquid was an efficient and economic pretreatment method of maize straw.

Keywords: Ammonia pretreatment; Biogas liquid; Maize straw; Rumen microorganism.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetates / analysis
  • Ammonia / pharmacology
  • Anaerobiosis / drug effects
  • Animals
  • Bacteria / drug effects
  • Bacteria / metabolism*
  • Biofuels / microbiology*
  • Carbohydrates / analysis
  • Cattle
  • Crystallization
  • Fatty Acids, Volatile / analysis
  • Fermentation* / drug effects
  • Nitrogen / analysis
  • Oxidation-Reduction / drug effects
  • Rumen / microbiology*
  • Spectroscopy, Fourier Transform Infrared
  • Waste Products*
  • Zea mays / drug effects
  • Zea mays / metabolism*
  • Zea mays / ultrastructure

Substances

  • Acetates
  • Biofuels
  • Carbohydrates
  • Fatty Acids, Volatile
  • Waste Products
  • Ammonia
  • Nitrogen