Abstract
A techno-economic evaluation of a softwood bark biorefinery concept
integrated into a typical Finnish chemical pulping mill was carried out. Due
to the higher carbohydrate content of spruce bark over pine bark, spruce bark
was chosen to be the feedstock of the study. The pulp production capacity of
the mill was assumed to be 600 000 t/yr. Since bark constitutes about 10% of
the softwood the total amount of bark at the mill is 130 000 t dry bark/yr. In
this study half of this bark is led to the bio-refinery.
The clear conclusion of the study is that the studied concept is not
profitable with current prices and process steps: Enzyme and feedstock costs
constitute the major part of the operation and maintenance costs (~70%). From
the cost structure it can also be seen, that the price of the end products
should be several €/kg. One profitable concept would be the extraction of
phenolics straight from bark or from pre-treated bark and upgrading them to
valuable products.
| Original language | English |
|---|---|
| Publication status | Published - 2008 |
| MoE publication type | Not Eligible |
| Event | 11th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2008 - Prague, Czech Republic Duration: 24 Aug 2008 → 28 Aug 2008 |
Conference
| Conference | 11th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2008 |
|---|---|
| Abbreviated title | PRES 2008 |
| Country/Territory | Czech Republic |
| City | Prague |
| Period | 24/08/08 → 28/08/08 |
Keywords
- Bark biorefinery
- Bioethanol
- Techno-economic study
