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1.
The aerobic biodegradation kinetics of plant tannins in industrial wastewater
Marko Tramšek, Andreja Goršek, Peter Glavič, 2006, original scientific article

Abstract: This paper describes an experimental determination of the biodegradation rate for tannins present in industrial wastewater, after the extraction of chestnut chips. Experiments were performed in a laboratory aerobic reactor (Armfield) by using biomass from an existing industrial wastewater treatment plant. The outlet tannins concentration was determined under various processing conditions. Simultaneously, an optical microscope was used to monitor the mix of microbiological cultures in the biomass. On the basis of data obtained in experiments, non-linear regression was used to perform parametric analysis of various kinetic models, which took into account inhibition, as quoted in literature (Haldane, Edwards, Aiba, Luong). The statistical analysis, based on the P-criterion, F-criterion, adjusted coefficient of determination, Kolmogorov-Smirnov test and root mean squared error, showed that the biodegradation of plant tannins in industrial wastewater under selected conditions for aerobic digestion, can be most successfully described statistically by the Aiba's kinetic model.
Keywords: plant tannins, susbtrate inhibition, kinetic models, statistic analysis, aerobic industrial wastewater digestion
Published: 31.05.2012; Views: 1101; Downloads: 20
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2.
Aerobic digester design for the biodegradation of plant tannins in industrial wastewater
Marko Tramšek, Andreja Goršek, 2008, original scientific article

Abstract: This paper describes aerobic digester design for the biodegradation of plant tannins in industrial wastewater. For optimal design, using the criterion of minimal total holding time, some experimental investigations into tannins' biodegradation rate in industrial wastewater were performed in the first part of this research. The chemical oxygen demand method (COD) was applied to follow the tannins degradation rate. The kinetic parameters of a supposed Aiba's inhibition kinetic model were determined using experimental data. In the second part of the study, equations for determining the optimal volumes of two in series connected aerobic digesters were established. Furthermore, a comparison is presented of volumes between one and two in series connected aerobic digester systems regarding wastewater volume flow rate, qV = 120 m3 d-1 and wastewater treatment efficiency, COD = 9 8%.
Keywords: digester design, plant tannins, Aiba's inhibition kinetic model, aerobic digestion, industrial wastewater
Published: 31.05.2012; Views: 1126; Downloads: 31
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