Properties of the activated sludge after lipase bioaugmentation

Bioaugmentation of the activated sludge with microflora, which is capable of biochemical oxidation of lipids, influences the physicochemical parameters of the wastewater treatment process. The results present not only the changes related to the quality and quantity of the sludge, but also loads of the aeration chambers and the sludge with the load of contaminants. It seems possible to dose the substrate, which produces bacterial lipase in aquatic environment, in such a way as to maximize the activity of this enzyme or to maximize the time it is present inside the reactor. Simulation of the reactor operation, based on measurements, enables the kinetics of the biological wastewater treatment process to be determined. The modelling of the processes facilitates the decision making in order to maintain high efficiency of plant operation through bioaugmentation; for example, by using the relative biomass growth rate with respect to substrate concentration, together with approximation for the Haldane's model, information about strong substrate inhibitory action has been gained.