Effects of Waste Activated Sludge Extracellular Polymeric Substances on Biosorption

Extracellular polymeric substances (EPS) reportedly make up approximately half of the organic matter in activated sludge (AS), and therefore strongly influence AS properties. This study evaluated component fractions EPS normalized to volatile suspended solids (VSS) waste (WAS) from a trickling-filter-solids contact process (TF/SC) its ability biosorb raw wastewater with 30 min time. Biosorption is which (carbohydrates, proteins, humic acids, DNA, uronic lipids) sorbate, such as wastewater, sorbs onto sorbent WAS. A statistically significant correlation was found between both total concentration proteins biosorption removal soluble chemical oxygen demand (sCOD) truly COD (ffCOD). Thus, forms can accurately be predicted by quantifying just amount WAS-associated EPS. No correlations were for colloidal (cCOD). WAS biosorbed 45–75 mg L?1 min. absorbed or stored fraction microbial products (SMP) during process. Higher concentrations acids effluent than untreated warrants further study. Longer cation exchange resin (CER) extraction times yielded more sludge: 90 ± 9, 158 3, 316 44 g?1 VSS, 45-min, 4-h, 24-h times, respectively. extracted represented only 9%, 15.8%, 31.6% respectively, raising questions about whether accurate characterization performed using typical time 45 due different rates components. It that much slowly other fractions.