Toward a sustainable biorefinery using high-gravity technology
Journal article, 2017

The realization of process solutions for a sustainable bioeconomy depends on the efficient processing of biomass. High-gravity technology is one important alternative to realizing such solutions. The aims of this work were to expand the knowledge-base on lignocellulosic bioconversion processes at high solids content, to advance the current technologies for production of second-generation liquid biofuels, to evaluate the environmental impact of the proposed process by using life cycle assessment (LCA), and to develop and present a technically, economically, and environmentally sound process at high gravity, i.e., a process operating at the highest possible concentrations of raw material. The results and opinions presented here are the result of a Nordic collaborative study within the framework of the HG Biofuels project. Processes with bioethanol or biobutanol as target products were studied using wheat straw and spruce as interesting Nordic raw materials. During the project, the main scientific, economic, and technical challenges of such a process were identified. Integrated solutions to these challenges were proposed and tested experimentally, using wheat straw and spruce wood at a dry matter content of 30% (w/w) as model substrates. The LCA performed revealed the environmental impact of each of the process steps, highlighting the importance of the enzyme dose used for the hydrolysis of the plant biomass, as well as the importance of the fermentation yield.

life cycle assessment

high solids

biobutanol

wheat straw

bioethanol

spruce

Author

Charilaos Xiros

Chalmers, Biology and Biological Engineering, Industrial Biotechnology

Mathias Janssen

Chalmers, Energy and Environment, Environmental Systems Analysis

Roberth Byström

Børre T. Børresen

David Cannella

Henning Jørgensen

Rakesh Koppram

Chalmers, Biology and Biological Engineering, Industrial Biotechnology

Christer Larsson

Chalmers, Biology and Biological Engineering, Systems and Synthetic Biology

Lisbeth Olsson

Chalmers, Biology and Biological Engineering, Industrial Biotechnology

Anne-Marie Tillman

Chalmers, Energy and Environment, Environmental Systems Analysis

Sune Wännström

Biofuels, Bioproducts and Biorefining

1932-104X (ISSN)

Vol. 11 1 15-27

Driving Forces

Sustainable development

Subject Categories

Biochemicals

Industrial Biotechnology

Environmental Engineering

Bioenergy

Areas of Advance

Energy

DOI

10.1002/bbb.1722

More information

Created

10/7/2017