Effect of thermochemical pretreatment on sewage sludge and its impact on carboxylic acids production

Stabilisation of microalgae: Iodine mobilisation under aerobic and anaerobic conditions

“…The nitrogen content (6.5%) of the waste microalgae in this study was higher than that of many organic wastes (Komilis et al, 2012). The content of phosphorous (0.6%) in waste microalgae was lower than the P content (1-2%) in some P-rich organic wastes and sludges (García-Romero et al, 2014;Rughoonundun et al, 2010;Wilkie and Mulbry, 2002), but higher than many reported waste algae materials (Bucholc et al, 2014;Ibrahim et al, 2014). These Fig.…”

Lime pretreatment to improve methane production of smooth cordgrass (Spartina alterniflora)

“…Design levels for lime loading, pretreatment temperature and time were selected according to the previous works [10,15,17]. Lime loading was between 0.02 and 0.12 (g Ca (OH) 2 /g dry SC), pretreatment time was between 7 and 28 days and the temperature was between 25 and 55°C.…”

“…Improvement of lignocellulosic biodegradation with lime pretreatment has been demonstrated on corn stovers [11], polar wood [10,12], sugarcane bagasse [13,14], and wheat straw [13], etc. Short-term or long-term lime pretreatments were recommended for high, medium or low lignin lignocelluloses contents [10,15]. Long-term lime pretreatment is preferred because it uses much a lower temperature and pressure, and pretreatment only needs a simple reactor, which may also be the biomass store [11,12].…”

Value-Added Products Derived from Waste Activated Sludge: A Biorefinery Perspective

“…Clostridium and Bacillus (phylum Firmicutes) and Gammaproteobacteria (phylum Proteobacteria) were found to be the dominant functional bacteria for high SCFAs accumulation. The last step of methanogenesis usually should be inhibited during the anaerobic digestion of WAS to enhance the SCFAs production, which can be achieved by adding a methane analogue, for example, iodoform [34]. Li et al reported on the effect of CaO 2 as an additive for enhanced SCFAs production during anaerobic digestion of WAS.…”