Production of Soluble Microbial Products (SMP) in an Anaerobic Baffled Reactor: Composition, Biodegradability, and the Effect of Process Parameters

Characterization of dissolved compounds in submerged anaerobic membrane bioreactors (SAMBRs)

“…Schiener et al 27 assessed the anaerobic biodegradability of SMP produced in an ABR and showed that all MW fractions were between 62% and 82% biodegradable, and that although SMP was anaerobically biodegradable, in some cases a residence time of 11 days was required. The authors identified the hydrolysed high-MW fraction as a heteropolysaccharide consisting of glucose, fucose and Nacetylgalactosamine, which are cell wall constituents.…”

Flux and performance improvement in a submerged anaerobic membrane bioreactor (SAMBR) using powdered activated carbon (PAC)

“…This increased production of SMPs due to catabolism and cell lysis is associated with stresses at low HRT and high loading rates [10], and their accumulation demonstrates their slower biodegradability. Schiener et al [18] also reported that all MW fractions of the SMPs produced in anaerobic digestion were less degradable anaerobically, and found that the high MW fraction consisted of organics that were cell wall constituents. Therefore, it is possible that enhanced cell lysis due to high cell ages of the biomass in SAMBR 1 (1) contributed to the enhanced accumulation of SMP.…”

Influence of soluble microbial products (SMP) on wastewater disinfection byproducts: trihalomethanes and haloacetic acid species from the chlorination of SMP

“…They consist of macromolecules and cellular debris with a protein, polysaccharide, humic acid, and DNA signature. Many published results (Rittmann et al 1987;Noguera et al 1994;Schiener et al 1998) showed that the majority of the DOM in effluents from biological treatment processes was actually SMP. Since they were poorly biodegradable and could not be readily removed through sequential treatment, Namkung and Rittmann (1988) postulated that SMP might be precursors for THM formation when subjected to disinfection.…”