Conditioning of sewage sludge by Fenton’s reagent combined with skeleton builders

Principal component analysis on sewage sludge characteristics and its implication to dewatering performance with Fe2+/persulfate-skeleton builder conditioning

“…Hence, it is easier to obtain a high solid content dewatered cake when its initial VSS/TSS was lower than 50.0 wt% and initial SC was higher than 3.0 wt%. It should be noted that there is no agreed standard unit for dosages of various chemical conditioners, and different units were used for sludge conditioning, such as ''mg/L'' (Lu et al 2003;Wang et al 2009), ''mg/g dry solid'' (He et al 2015;Liu et al 2012;Mo et al 2015), ''v/v'' (Zhang et al 2015) and ''mmol/g VSS'' (Zhen et al 2012). In view of the importance of SC and VSS/TSS in sludge conditioning, an integrated dosage optimization method which based on the SC and VSS/TSS should be further considered for sludge conditioning.…”

Insights into the respective role of acidification and oxidation for enhancing anaerobic digested sludge dewatering performance with Fenton process

“…In addition, the ferric hydroxo complexes produced from Fenton process could act as coagulants to further enhance dewatering performance of biosludge (Neyens and Baeyens, 2003a). Liu et al (2012) found that sludge conditioning with combined Fenton's reagent and skeleton builders was an efficient mean to achieve deep dewatering. Fenton treatment resulted in partial destruction of EPS and decrease in sludge floc size.…”

Reuse of dewatered sewage sludge conditioned with skeleton builders as landfill cover material

“…Sewage sludge produces highly compressible filter cakes that were difficult to be dewatered by pressure filtration because its particles would deform under high pressure (Zall et al 1987). Physical conditioners, often known as skeleton builders, such as fly ash, lime, plaster, and cement were commonly used to enhance the rate and extent of sewage sludge dewatering (Liu et al 2012;Qi et al 2011;Chen et al 2010;Zhao 2002) because they formed a permeable and rigid lattice structure in sludge cakes (Benítez et al 1994).…”