Activated sludge kinetics

Yamada Y, Kawase Y (2006) Aerobic composting of waste activated sludge kinetic analysis for microbiological reaction and oxygen consumption. Waste Manage 26 49-61... 

El-Rehaili, A.M. 1994. Implications of activated sludge kinetics based on total or soluble BOD, COD and TOC. Environ. Technol. 15 1161-1172. 

P. Benedek and I. Horath, "A Practical Approach to Activated Sludge Kinetics," Wafer Res., i 663 (1963). 

Kinetics and Case Histories of Activated Sludge Secondary Flotation Systems... 

General Kinetics of the Activated Sludge Wastewater Treatment System... 

Process-Specific Kinetics of the Conventional Activated Sludge Process Systems with Sludge Recycle... 

Specific Kinetics of the Improved Activated Sludge Process Using Secondary Flotation... 

Majewski M, Galle T, Yargeau V, Fischer K (2011) Active heterotrophic biomass and sludge retention time (SRT) as determining factors for biodegradation kinetics of pharmaceuticals in activated sludge. Bioresour Technol 102 7415-7421... 

A combination of the concepts behind Equations (2.28) and (2.29) is applied in the activated sludge model for the kinetics of the hydrolysis processes (Henze et al., 1987). This combined concept, originally proposed by Dold et al. (1980), includes a saturation type of expression and a heterotrophic biomass with a maximum capacity for hydrolysis ... 

Hydrolysis of particulate substrates produces readily biodegradable substrate for the biomass (cf. Figure 5.4 and Section 3.2.3). The kinetics of the hydrolysis, following the concept of the activated sludge model one, is described in Section 2.2.2. The following interpretation of hydrolysis of wastewater in a sewer is considered particulate substrate is available in the bulk water phase, and biomass in the bulk water and biofilm—assuming a reduced activity in the biofilm—is taken into account. Under these conditions, the rate of hydrolysis, rhydr, for each of the hydrolyzable fractions, n, is as follows ... 

In addition to the kinetics of the sewer processes described in Section 5.3, the stoichiometry of the transformations of the components is crucial for the mass balance. The stoichiometry of the biomass/substrate relationships is, according to the activated sludge model concept, determined by the heterotrophic biomass yield constant, YH, in units of gCOD gCOD-1. As depicted in Figure 5.5, the yield constant is an important factor related to the consumption of both Ss and S0 for the production of XBw. 

Kappeler, J. and W. Gujer (1992), Estimation of kinetic parameters of heterotrophic biomass under aerobic conditions and characterization of wastewater for activated sludge modelling, Water Sci. Tech., 25(6), 125-139. 

Respiration inhibition kinetics analysis (RIKA) involves the measurement of the effect of toxicants on the kinetics of biogenic substrate (e.g., butyric acid) removal by activated sludge microorganisms. The kinetic parameters studied are max> the maximum specific substrate removal rate (determined indirectly by measuring the maximum respiration rate), and Ks, the half-saturation coefficient [19]. The procedure consists of measuring with a respirometer the Monod kinetic parameters, Vinax and Ks, in the absence and in the presence of various concentrations of the inhibitory compound. 

Based on this equation, when the pseudo-first-order kinetic constant ( ga) was estimated at 150 Lg of (TSS)J, the half-life of E2 was established to be 0.2 h, with nearly all of the E2 being converted to El. El was removed more slowly at a half-life of 1.5 h and a kinetic constant of approximately 20 L g of (TSS)J, and EE2 was not significantly degraded under those same conditions. By comparison, in similar experiments conducted by Layton et al. (2000) at higher temperamres (30°C), at least 40% of the EE2 was mineralized in activated sludge within 24 h. 

The polarographic method has been used to determine the stability constants and kinetic parameters of ternary complexes of Zn(II) with L-lysine, L-omithine, L-serine, L-phenylglycine, L-phenylalanine, L-glutamic acid, and L-aspartic acid as primary ligands and picoline as secondary ligand at pH 8.5 [103] and also of zinc complexation by extracellular polymers extracted from activated sludge [104]. 

A. Cabrero, S. Fernandez, F. Mirada, J. Garcia, Effects of copper and zinc on the activated sludge bacteria growth kinetics, Water Res. 32 (1998) 1355-1362. 

The reaction and separation synthesis approach of Section 5 has been adopted to the problem of activated sludge process design (83). The conventional designs as well as all novel schemes for combined oxidation/denitrification of wastewater are explored. The process is optimized using a novel methodology for optimal reaction/separation network synthesis, supplied with a comprehensive kinetic model (84). The activated sludge process is synthesized using the systematic... 

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