2. November 6 3,5 14 12,07 8,13 December 6

2.

SEASONAL VARIATION OF BIOWASTEInstead of using the average values of biowaste andgarden waste generated throughout the year, we considered a seasonal variationof both, biowaste and garden waste. Considering the climate conditions, we usedthe data of the city of Kaunas, Lithuania 2009 (Denafas et al., 2014). Figure xx: Monthly variation of MSWgeneration and composition in Kaunas, Lithuania in 2009. (Denafas et al., 2014)The data fromthe graph was extracted to calculate the percentage of each of the fractions inorganic waste.

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The categories food waste, yard waste and other organic weretaken into account. Month other organic (kg/capita) yard waste (kg/capita) food waste (kg/capita) % garden waste % biowaste (w/o garden) January 5 1,5 11 5,17 6,50 February 3 0 11 0 5,69 March 5 0,5 13 1,72 7,32 April 4 1,5 14 5,17 7,32 May 3,5 3 12,5 10,34 6,50 June 9 6 13 20,69 8,94 July 11 3 13 10,34 9,76 August 10 3 13 10,34 9,35 September 10 1,5 20 5,17 12,20 October 8 3,5 17 12,07 10,16 November 6 3,5 14 12,07 8,13 December 6 2 14 6,90 8,13 Total 80,5 29 165,5 100 100 Table x: monthly variation of biowasteTo simplify,four seasons were considered: spring (March, April, May), summer (June, July,August), autumn (September, October, November) and winter (December, January,February). In the table below we can see the percentages of biowaste producedin each of the seasons.

Season % garden waste % biowaste (w/o garden) Spring 17,24 21,14 Summer 41,38 28,05 Autumn 29,31 30,49 Winter 12,07 20,33 Total 100 100 Table xx: Seasonal variation of biowasteINPUT OF GARDEN WASTE   anual volume (m3/year) anual mass (ton/year) Density (ton/ m3) DS (%) Ods (%) Impurities (%) Garden waste 6000 859,5 0,15 81 79,3 4,5  Tablexx: Garden wasteThe amount of garden waste treated per year can becalculated as follows:In the table below the amount of garden waste that hasto be treated for every season is presented. ton/season (w/o impurities) ton/month (w/o impurities) Spring 17,24% 148,17 48,31 Summer 41,38% 355,66 115,97 Autumn 29,31% 251,91 83,05 Winter 12,07% 103,74 34,58 Table xx: Garden waste per season REFERENCESDenafas, G., Ruzgas, T.,Martuzevi?ius, D., Shmarin, S., Hoffmann, M., & Mykhaylenko, V. et al.

(2014). Seasonal variation of municipal solid waste generation and compositionin four East European cities. Resources, Conservation And Recycling, 89,22-30.

http://dx.doi.org/10.1016/j.resconrec.2014.06.001