“…Near-infrared spectroscopy has been previously used as a technique to predict stability parameters in different organic wastes (Reeves and Van Kessel, 2000;Reeves, 2001;Malley et al, 2002Malley et al, , 2005Saeys et al, 2005;Shepherd et al, 2005;Huang et al, 2007;Sorensen et al, 2007;Fujiwara and Murakami, 2008;Albrecht et al, 2009;Vergnoux et al, 2009). To our knowledge, NIR spectroscopy has not been used to predict stability parameters for sewage sludge, and only few studies have reported using NIR spectroscopy to estimate microbial respiration in organic wastes.…”