CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Influence of high gravity process conditions on the environmental impact of ethanol production from wheat straw

Matty Janssen (Institutionen för energi och miljö, Miljösystemanalys) ; Anne-Marie Tillman (Institutionen för energi och miljö, Miljösystemanalys) ; David Cannella ; Henning Jørgensen
Bioresource Technology (0960-8524). Vol. 173 (2014), p. 148-158.
[Artikel, refereegranskad vetenskaplig]

Biofuel production processes at high gravity are currently under development. Most of these processes however use sugars or first generation feedstocks as substrate. This paper presents the results of a life cycle assessment (LCA) of the production of bio-ethanol at high gravity conditions from a second generation feedstock, namely, wheat straw. The LCA used lab results of a set of 36 process configurations in which dry matter content, enzyme preparation and loading, and process strategy were varied. The LCA results show that higher dry matter content leads to a higher environmental impact of the ethanol production, but this can be compensated by reducing the impact of enzyme production and use, and by polyethylene glycol addition at high dry matter content. The results also show that the renewable and non-renewable energy use resulting from the different process configurations ultimately determine their environmental impact.

Nyckelord: High gravity hydrolysis and fermentation, Wheat straw, Life cycle assessment, Energy analysis


Highlights: (1) LCA of a new high gravity technology for producing ethanol from wheat straw was done; (2) Higher dry matter content in the process leads to a higher environmental impact; (3) Reducing the impact of enzyme production and use can compensate this impact; (4) Addition of polyethylene glycol at high dry matter content also lowers the impact; (5) Renewable and non-renewable energy use ultimately determine the impact.



Den här publikationen ingår i följande styrkeområden:

Läs mer om Chalmers styrkeområden  

Denna post skapades 2014-10-07. Senast ändrad 2015-02-11.
CPL Pubid: 203852

 

Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)