Ola Wallberg, PhD, is an associate Professor at the department of Chemical Engineering at Lund University. He started his research in the field of membrane processes when attempting to fractionate kraft black liquor and concentrate the lignin fraction. The overall aim was to reach a lignin concentration and lignin purity high enough for further use as a biofuel. The main achievement was the development of operating procedures for ultrafiltration of kraft black liquor at temperatures above the normal boiling point and in achieving fractionation between hemicelluloses and lignin in the liquor. The membrane filtration work was performed under the guidance of Professor Ann-Sofi Jönsson. After receiving his PhD in 2005 he continued as a researched in the lignin fractionation field working with membrane filtration and with the Lignoboost process in cooperation with Inventia. In 2007 he was brought over to the bioethanol field by Professor Guido Zacchi, first as a researcher connected to the Process Development Unit and later on as the main responsible for the techno-economical evaluations related to the ethanol research at the department. Since Professor Zacchis retirement Ola heads the ethanol research group together with associate Professor Mats Galbe. Much of the groups research is directed towards improving the ethanol production from lignocellulosic biomass. The research is centred around the PDU unit, and specifically the pretretment of biomass which can be performed in either batch or continuous reactors is of main concern. Being able to effectively pretreat biomass either by steam explosion or other novel technologies is key obstacle for ethanol production and biorefinery research. In parallel with the biorefinery research Ola has ongoing research related to membrane filtration of kraft black liquor with the aim of producing a lignin fraction suitable as a feedstock for oil refineries for the production of a green gasoline. He is also the coordinator for Lund University in the Swedish knowledge centre for renewable transportation fuels (f3).
- Hydrotropisk fraktionering av biomassa
- Isolering av hemicellulosa från sulfitlut
- Membranfiltrering i bioraffinaderier (På engelska)
Evaluation of Pretreatment and Process Configurations for Combined Ethanol and Biogas Production from Lignocellulosic Biomass
ISBN 978-91-7422-476-4, Chemical Engineering, Lund University, 2016.
Membrane Filtration for Fractionation of Biomass Compounds - Process Design for the Separation of Hemicelluloses and Lignin from Alkaline Solutions
ISBN 978-91-7422-407-8, Department of Chemical Engineering, Lund University, 2015.
Techno-economic evaluation of integrated lignocellulosic ethanol production
ISBN 978-91-7422-427-6, Department of Chemical Engineering, Lund University, 2015.
Ethanol from Sugarcane Lignocellulosic Residues - Opportunities for Process Improvement and Production Cost Reduction
ISBN 978-91-7623-087-9 (print), Department of Chemical Engineering, Lund University, 2014.
Development of integrated cellulose- and starch-based ethanol production and process design for improved xylose conversion
ISBN 978-91-7422-324-8, Department of Chemical Engineering, Lund University, 2013.
Production of Ethanol from Spruce at High Solids Concentrations - An Experimental Study on Process Development of Simultaneous Saccharification and Fermentation
ISBN 978-91-7422-334-7, Lund University, Faculty of Engineering, Department of Chemical Engineering, 2013.
Separation of Biomass Components by Membrane Filtration - Process Development for Hemicellulose Recovery
ISBN 978-91-7422-329-3, Lund University, 2013.
- Influence of dielectric constant on the separation of O-acetyl-galactoglucomannan
and lignin-carbohydrate-complexes during anti-solvent precipitation of ultra-filtrated
- Influence of prefiltration on membrane performance during isolation of lignin-carbohydrate
complexes from spent sulfite liquor
- Removal of Water-Soluble Extractives Improves the Enzymatic Digestibility of Steam-Pretreated
- Greenhouse gas performance of biochemical biodiesel production from straw : Soil organic
carbon changes and time-dependent climate impact
- Sequential Targeting of Xylose and Glucose Conversion in Fed-Batch Simultaneous Saccharification
and Co-fermentation of Steam-Pretreated Wheat Straw for Improved Xylose Conversion
- Integrating enzyme fermentation in lignocellulosic ethanol production: life-cycle
assessment and techno-economic analysis
- Influence of pre-filtration on membrane performance during isolation of lignin-carbohydrate-complexes
from spent sulfite liquor
- Combined ethanol and methane production from switchgrass (Panicum virgatum L.) impregnated
with lime prior to steam explosion
- Bioethanol production from forestry residues : A comparative techno-economic analysis
- Techno-economic evaluation of integrated first- and second-generation ethanol production
from grain and straw.