Original scientific paper
Treatment of Tobacco Dust Leachate by Activated Sludge – Evaluation of Biokinetic Parameters
M. Vukovič Domanovac
orcid.org/0000-0001-5818-7347
; Department of Industrial Ecology, Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, HR-10000 Zagreb
I. Ćosić
; bEurco d.d., H.V. Hrvatiniæa 87, 32100 Vinkovci, Croatia
M. Sojčić
; bEurco d.d., H.V. Hrvatiniæa 87, 32100 Vinkovci, Croatia
F. Briški
; Department of Industrial Ecology, Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, HR-10000 Zagreb
Abstract
Treatment of tobacco dust leachate represents an important problem because of high concentrations of organic compounds. Experiments were carried out in a batch conditions
at initial concentrations of activated sludge of 3.1 g dm–3 (Exp.1) and 6.0 g dm–3 (Exp.2) and different initial concentrations of organic matter in leachate, expressed as
COD concentrations, which were in range from 500 to 5000 mg dm–3. Efficiency of biodegradation process was approximately 89.4 % of COD removal. The kinetic parameters, maximum specific growth rate (μmax), substrate saturation constant (Ks) and overall yield coefficient (Y), during experiments were found to be 0.088 h–1, 4241 mg dm–3, and 0.400 mg mg–1 for Exp. 1; and 0.052 h–1, 3168 mg dm–3, and 0.257 mg mg–1 for Exp. 2, respectively. Monod model gives very good fits to experimental data, accompanied by a high regression coefficient (R2).
Keywords
Tobacco dust; leachate; activated sludge; biodegradation
Hrčak ID:
99437
URI
Publication date:
29.3.2013.
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