Innovative decentralized biorefinery for lignocellulosic biomass: Integrating anaerobic digestion with thermochemical conversion
A novel decentralized biorefinery integrating anaerobic digestion (AD) and thermochemical conversion of Napier grass (Pennisetum purpureum),a high yielding tropical energy crop,as a mono-substrate was developed.Horizontal bioreactors were used to mitigate the biomass floating and scum formation problems,which are the major issues in AD of lignocellulosic feedstocks.The highest organic loading rate that could be applied with a stable long-term operation of over 300 days,was 6 kg volatile solids (VS)/m3-d and the corresponding methane yield was 112.48±9.03 NmL/g VSadded.Hemicellulose was the main component of lignocellulosic biomass (i.e.,7-22% removal) contributing to methane production;while cellulose and lignin were left in the digestate.This cellulose-and lignin-rich fiber was further processed thermochemically via torrefaction and hydrothermal carbonization to produce solid biofuels,which were found to have energy content similar to bituminous coal.Thus,the developed process opens-up a new avenue for a much broader application of AD process to provide clean and renewable energy.
Anaerobic digestion Lignocellulosic biomass Torrefaction Hydrothermal carbonization Solid biofuels
Chayanon Sawatdeenarunat Hyungseok Nam Sushil Adhikari Samir Kumar Khanal
Department of Molecular Biosciences and Bioengineering (MBBE), University of Hawaii at Mānoa, Honol Department of Biosystems Engineering, Auburn University, Auburn, AL 36849, USA
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
717-720
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）