Modeling and parameter estimation of two-phase endogenous respirograms and COD measurements during aerobic digestion of biological sludge

Characterization of microflora and transformation of organic matters in urban sewer system

“…When the concentrations of DO reached 6 mg/L, the aeration device was shut down and monitoring of the changes in DO continued. The contents of the rapidly biodegradable COD (RBCOD) and the slowly biodegradable COD (SBCOD) were calculated using MATLAB software and a correlation formula (Fall et al, 2014).…”

A simple kinetic modeling approach for aerobic stabilization of real waste activated sludge

“…Some studies included the biodegradation [14][15][16] or hydrolysis [13] of particulate microbial product, which is accepted as inert in ASMs. Recently, a comparison of ASM1 and ASM3 to simulate experimental data gathered from aerobic digestion system were performed by Fall et al [14]. Although, the COD profile was adequately simulated with both models, only the parameters of ASM1 were found to be identifiable.…”

“…In this framework, ASM1 and ASM3 have been modified or simplified for modeling of the aerobic digestion by considering biomass decay as a main process [13][14][15][16]. Some studies included the biodegradation [14][15][16] or hydrolysis [13] of particulate microbial product, which is accepted as inert in ASMs. Recently, a comparison of ASM1 and ASM3 to simulate experimental data gathered from aerobic digestion system were performed by Fall et al [14].…”

“…A more accurate model can be provided by the simultaneous modeling of (i) different measurements or (ii) different experiments [19,20]. The quality of a model can be improved by simultaneous modeling of several different measurements, such as COD and VSS profiles [15,16] or COD and OUR profiles [10,13,14]. If the aim is to simultaneously modeling several different experiments, it is important to choose an operating parameter which does not have any effect on microbial mechanisms.…”

“…During aerobic digestion, microorganisms consume their cell material in the absence of external carbon sources, undergoing an endogenous decay process [11,12]. In this framework, ASM1 and ASM3 have been modified or simplified for modeling of the aerobic digestion by considering biomass decay as a main process [13][14][15][16]. Some studies included the biodegradation [14][15][16] or hydrolysis [13] of particulate microbial product, which is accepted as inert in ASMs.…”