Several attempts were performed for the energy recovery of the coffee residues (Saenger et al., 2001). Kondamudi et al. showed that SCG can be used for biodiesel and fuel pellets production (Kondamudi et al., 2008). Recently, the potential of SCG as a precursor for preparing biochar fuel was examined (Tsai et al., 2012). The authors have shown that the obtained biochar may replace coal as solid fuel in the industrial sector (Tsai et al., 2012).