The effects of sulfite pretreatment on the biodegradability and solubilization of primary sludge: Biochemical methane potential, kinetics, and potential implications

Comparing the effects of Al-based coagulants in waste activated sludge anaerobic digestion: Methane yield, kinetics and sludge implications

“…In fact, the presence of two well defined peaks around 600 cm −1 was observed only after the addition of 20 mg Al/g TS of AS; whereas, both in the case of control and PAC 20 samples, this region was characterized by broad bands with weakly marked peaks. The presence of these bands confirmed the existence of groups such as C–O, C–O–C and P O in polyesters and polysaccharides, and demonstrated the superiority of AS as a coagulant also towards phosphate and sulfate groups [ 25 , 27 ].…”

“…To investigate the effect of PAC and AS on WAS anaerobic digestion, batch experiments were performed in replicate serum reactors (1000 mL of total volume, 600 mL of working volume). Each reactor was analyzed in triplicate, and the ratio of inoculum to substrate was determined based on VS content [ 27 ], following the standardized procedure developed by Angelidaki et al [ 28 ] and adapted by Pecorini et al [ 29 ].…”