Guanghui Yu

TL;DR: The results suggest that PN and PN/PS in the supernatant and slime layers, which are usually decanted due to their assumed lower content of organic matter, markedly impact sludge dewaterability.

TL;DR: Results showed that for two excess sludges, the tightly bound EPS (TB-EPS) fraction possessed a high flocculating rate to kaolin suspension compared with the other EPS fractions, and further investigation reveals that the TB-Eps fraction caused aggregation of particles by bridging and sweep flocculation.

TL;DR: Physicochemical analysis showed that the contents of polysaccharides in EPS matrix were higher than those of proteins, regardless of the differences in growth phases and nutritional levels in medium, and Pearson correlation analysis demonstrated that tryptophan-like substances in the LB-EPS and TB-Eps fractions were positively correlated with Microcystis growth.

TL;DR: Ultrasonic pretreatment enhances enzymatic activities and promotes the shifts of extracellular proteins, polysaccharides and enzymes from inner layers of sludge flocs to outer layers, i.e., pellet and TB-EPS, to increase the contact and interaction among extraceocytes that were originally embedded in the sludge Flocs, resulting in improved efficiency in aerobic digestion.

TL;DR: The results in general showed that the highest microbial populations and enzymatic activities also appeared in this phase, indicating that the rapid composting method was a feasible one for treating agricultural wastes.