Swedish resource potential from residues and energy crops to enhance biogas generation

Biogas potential for sustainable transport – a Swedish regional case

“…Our estimates show that by 2012 only 30% of food waste was segregated and destined for biological treatment, which still lagged behind the 2010 target of 35% (Linn e et al, 2008;SwedWaste, 2013). Nevertheless, there is a large regional variation.…”

“…how available food waste can increase though waste segregation, or available industrial residues can increase through a shift in use. The parameter Y has been reused from previous studies for the evaluation of all resource categories except sewage sludge (Nordberg et al, 1998;SGC and Biomil AB, 2005;Linn e et al, 2008). In the case of sewage sludge, Best Available Practice in the region is investigated through a survey and this value is used for the parameter Y when estimating the potential.…”

“…The low degree of food waste sorting in Stockholm County is largely explained by the low rates in Stockholm City, where food waste sorting in 2013 was only 9%, of which 92% (i.e., 8.2% of total food waste) was applied in biogas generation (J Nilsson, 2013, personal communication, 23 May). Recent efforts are improving the degree of food waste sorting and our assessment shows that in 2012 it increased to around 27% in Stockholm County (Linn e et al, 2008;SwedWaste, 2013;J Westin, 2013, personal communication, 12 September). Convenient infrastructure for waste segregation in households and short distances to drop-off points have proven to be important factors in achieving a high level of waste segregation (Bernstad, 2014;Rousta et al, in press).…”

“…The sources used in our estimations of food waste potential are official statistics (SwedWaste, 2013), reports, environmental reports (SYVAB, 2013;StockWater, 2013), key values of food waste generation per capita based on waste samples (Linn e et al, 2008), and personal communications with key persons responsible for statistics and waste handling, respectively (J Westin, 2013, personal communication, 12 September; J Nilsson, 2013, personal communication, 23 May). Data can sometimes be conflicting.…”

“…The statistics from Swedish Waste Management are based on data given by individual municipalities that calculate their statistics differently. Approximations must be made to estimate the share of food waste that is segregated (Linn e et al, 2008). This is because the total amount of food waste generated must be 6 Ton refers to metric ton.…”