Research Information System
Journal of Material Cycles and Waste Management, 2026 (SCI-Expanded, Scopus)
This study evaluates the effectiveness of peroxymonosulfate (PMS)-based chemical conditioning in enhancing waste-activated sludge (WAS) disintegration and subsequent anaerobic digestion. PMS was activated using three distinct methods—thermal, alkaline, and ultrasonic—under a range of operational parameters. Disintegration efficiency was assessed by monitoring soluble chemical oxygen demand (SCOD), protein, and carbohydrate concentrations. All activation strategies significantly improved solubilization compared to untreated sludge. Ultrasonic activation yielded the highest SCOD (7.79-fold) and carbohydrate (12.43-fold) increases, while thermal activation resulted in a tenfold rise in protein concentration. To evaluate energy recovery potential, Biochemical Methane Potential (BMP) tests were conducted under optimal disintegration conditions. All activated PMS treatments led to increased methane yields, with ultrasonic activation performing best. However, the alkaline method, despite its strong solubilization performance, produced slightly lower methane yields—likely due to the formation of inhibitory by-products such as free ammonia or refractory organics. The findings highlight the strong correlation between solubilization and methane production, emphasizing the role of the activation method in determining both efficiency and sustainability. Ultrasonic activation was most effective, whereas alkaline activation may suit energy-conscious scenarios. These results support PMS-based pretreatment as a promising strategy for improving sludge valorization and resource recovery.