Journal
BIOTECHNOLOGY AND BIOENGINEERING
Volume 114, Issue 5, Pages 951-960Publisher
WILEY
DOI: 10.1002/bit.26228
Keywords
methanogenesis; solid waste; biomethane potential; lignocellulose; predicting parameters; linear regression
Categories
Funding
- Air Force Civil Engineer Center (AFCEC) [FA4819-14-C-0004]
Ask authors/readers for more resources
Anaerobic digestion (AD) of lignocellulosic materials is commonly limited by the hydrolysis step. Unlike unprocessed lignocellulosic materials, paper and paper board (PPB) are processed for their fabrication. Such modifications may affect their methane yields and methane production rates. Previous studies have investigated the correlation between lignin and biomethane yields of unprocessed lignocellulosic materials; nevertheless, there is limited knowledge regarding the relationship between the AD kinetic parameters and composition of PPB. This study evaluated correlations of methane yields and Monod and Gompertz kinetic parameters with structural carbohydrates, lignin, and ash concentration of five types of PPBs. All components were used as single and combined independent variables in linear regressions to predict methane yield, maximum specific methanogenic activity (SMA(max)), saturation constant (K-s), and lag phase (). Additionally, microbial community profiles were obtained for each PPB assay. Results showed methane yields ranging from 69.2 +/- 8.61 to 97.2 +/- 2.29% of PPB substrates provided. The highest correlation coefficients were obtained for SMA(max) as function of hemicellulose/(lignin+ash) (R-2=0.86) and for as a function of lignin+cellulose (R-2=0.85). All other parameters exhibited weaker correlations (R(2)0.77). Relative abundance analyses revealed no major changes in the community profile for each of the substrates evaluated. The overall findings of this study are: (i) combinations of structural carbohydrates, lignin, and ash used as ratios of degradable to either non-degradable or slowly degradable fractions predict AD kinetic parameters of PPB materials better than single independent variables; and (ii) other components added during their fabrication may also influence both methane yield and kinetic parameters. Biotechnol. Bioeng. 2017;114: 951-960. (C) 2016 Wiley Periodicals, Inc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available