Journal of Fundamentals of Renewable Energy and Applications
Open Access
ISSN: 2090-4541
ISSN: 2090-4541
Young-Lok Cha, Youn-Ho Moon, Gyeong-Dan Yu, Ji-Eun Lee, Gi Hong An, Yeon-Sang Song and Kyeong-Bo Lee
National Institute of Crop Science, Korea
Posters & Accepted Abstracts: J Fundam Renewable Energy Appl
Various thermochemical pretreatments have been studied for the bioethanol production from cellulosic biomass. Normally pretreatment of biomass was performed by acid or alkaline hydrolysis at high temperature and pressure. In the case of herbaceous biomass, alkaline hydrolysis is advantageous to dissolve lignin. However, in alkali pretreatment process, wastewater is one of the critical problems for reducing operational costs. In this study, the feasibility of recycling pretreatment-generated wastewater was investigated. The pretreatment was conducted with a twin-screw extrusion reactor under conditions: screw speed 40 rpm, 0.5 M NaOH 27 L/h, biomass feeding 4.5 kg/h at 99�?°C. Solid fraction of pretreated biomass was recovered 67% using wastewater adjusted with 0.5 M NaOH. Cellulose recovery of pretreated biomass was 94%. Finally using wastewater recycling in the pilot plant, 25% of NaOH could be saved and 35% of process wastewater was decreased.
Young-Lok Cha is a Doctorate at the University of Hannover, Germany. He is working as a Senior Researcher at the National Institute of Crop Science, Rural Development Administration, Korea and his major is the development of lignocellulosic biomass conversion technology and biofuels production at pilot scale.
Email: biocha@korea.kr