Energy and environmental assessment of pellets produced from solid residues of the winery industry

  • Erman Dolmaci School of Engineering, Frederick University, Nicosia, Cyprus
  • Paris A. Fokaides School of Engineering, Frederick University, Nicosia, Cyprus
  • Polycarpos Polycarpou Production Division, Agricultural Research Institute, Nicosia, Cyprus


The study assessed the potential of waste by-products from the Cypriot winery industry as raw material for solid biofuels. Two different biomass blends were pelletized and assessed as an energy source for domestic hot water boilers. The samples were composed of Grape Pomace (P1) and Grape Pomace & Vine Shoots Blends (P2) provided by a Cyprus winery: Aes Ambelis (Nicosia, 35°01'12.4"N 33°09'19.5"E). The raw material was dried and pelletized at the facilities of the Agricultural Research Institute (ARI), Cyprus. The pellets were analyzed for moisture and ash content using well-established standardized methods at the Sustainable Solid Fuels Lab of Frederick University, Cyprus. Combustion tests with the pellets were also carried out at the Boilers Lab of Frederick University. The measurement campaign focused on flue gas analysis – in particular carbon monoxide, carbon dioxide, oxygen, lambda – as well as water temperature and boiler efficiency. The results obtained from analysis of the samples showed that most of the examined pellets satisfied the minimum requirements of EN ISO 17225-2 and EN ISO 17225-6 standards for woody and non-woody pellets respectively. Ash content and moisture content for both samples also complied with the standards. The results of the measurement campaign were in good agreement with results delivered by other studies conducted for similar biomass raw material. Study results showed that grape pomace and grape pomace vine shoots blend could potentially be used as an energy source for producing heat which could be exploited for the domestic and industrial sectors. Harvesting this waste stream for energy production purposes could offer economically and environmentally smart solutions for the winery industry in Cyprus, satisfying the circular economy principles which are currently at the forefront of European environmental policy.


[1] C. Okello, S. Pindozzi, S. Faugno, L. Boccia, Bioenergy potential of agricultural and forest residues in uganda, Biomass and bioenergy 56
(2013) 515–525.

[2] E. A. Christoforou, P. A. Fokaides, Thermochemical properties of pellets derived from agro-residues and the wood industry, Waste and Biomass Valorization 8 (4) (2017) 1325–1330.

[3] A. Lizides, A. G. Charalambides, S. Kassinis, Energy production from renewable sources by 2020–the cypriot case.

[4] R. Saidur, E. Abdelaziz, A. Demirbas, M. Hossain, S. Mekhilef, A review on biomass as a fuel for boilers, Renewable and sustainable energy reviews 15 (5) (2011) 2262–2289.

[5] M. Klemm, R. Schmersahl, C. Kirsten, N. Weller, Biofuels biofuel: Upgraded new solids biofuel upgraded new solids, in: Renewable Energy Systems, Springer, 2013, pp. 138–160.

[6] A. Kylili, E. Christoforou, P. A. Fokaides, Environmental evaluation of biomass pelleting using life cycle assessment, Biomass and Bioenergy 84 (2016) 107–117.

[7] The European Pellet Council (EPC), accessed 01.12.2016. URL

[8] C. Calderón, G. Gauthier, J. Jossart, Aebiom statistical report 2015, European Bioenergy Outlook. Key Findings. Bryssel.

[9] F. Fiedler, The state of the art of small-scale pellet-based heating systems and relevant regulations in sweden, austria and germany, Renewable and sustainable energy reviews 8 (3) (2004) 201–221.

[10] M. Miranda, J. Arranz, S. Román, S. Rojas, I. Montero, M. López, J. Cruz, Characterization of grape pomace and pyrenean oak pellets, Fuel processing technology 92 (2) (2011) 278–283.

[11] A. Garcia-Maraver, J. A. Pérez-Jiménez, Biomass Pelletization: Standards and Production, WIT Press, 2015, Ch. Biomass Pellet Fired Boilers, p. 79.

[12] A. Garcia-Maraver, J. A. Pérez-Jiménez, Biomass Pelletization: Standards and Production, WIT Press, 2015.
How to Cite
DOLMACI, Erman; FOKAIDES, Paris A.; POLYCARPOU, Polycarpos. Energy and environmental assessment of pellets produced from solid residues of the winery industry. Journal of Power Technologies, [S.l.], v. 98, n. 5, p. 382–386, jan. 2019. ISSN 2083-4195. Available at: <>. Date accessed: 02 aug. 2021.


Keywords: solid biofuels; grape pomace; vine shoots blends; pellets; ash content; moisture content; combustion emissions

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