“…To maintain their profitability and overcome the declining (Machani et al, 2014) and competitive (Karikallio et al, 2011) markets, P&P mills are no longer limited to production of pulp and/or paper; rather, they may adopt additional measures including waste heat delivery to district heating systems (e.g., Ericsson et al, 2011;Klugman et al, 2009) and production of the electricity, wood pellets, and dried bark as well as valuable chemicals such as ethanol (e.g., Fornell et al, 2012;Phillips et al, 2013) and materials like carbon fiber (see e.g., Maradur et al, 2012), biofuels, etc. (Jonsson et al, 2011).…”