title: Analysis of sludge aggregates produced during electrocoagulation of model wastewater.
abstract: This paper presents the results of the study of sludge aggregates produced during electrocoagulation of model wastewater of a composition corresponding to the effluents from the cellulose and paper industry. Wastewater was electrocoagulated statically using aluminium electrodes with a current density of 31.25 A m(-2) and 62.50 A m(-2). In subsequent stages of the treatment, sludge flocs were collected, their size was studied and their floc settling velocity (30-520 μm s(-1)) and fractal dimension (D) were determined. The values of D ranged from 1.53 to 1.95 and were directly proportional to the degree of wastewater treatment. Higher values of D were determined for sludge with lower water content (after 24 hours' settling). Fractal dimension can therefore be used as an additional parameter of wastewater treatment control.
authors.affiliation: Department of Chemistry, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury, 10-957 Olsztyn, Pl. Łódzki 4, Poland E-mail: bezetka@uwm.edu.pl.
authors.forename: B
authors.initials: B
authors.lastname: Załęska-Chróst
authors.affiliation: Department of Chemistry, Faculty of Environmental Management and Agriculture, University of Warmia and Mazury, 10-957 Olsztyn, Pl. Łódzki 4, Poland E-mail: bezetka@uwm.edu.pl.
authors.forename: R
authors.initials: R
authors.lastname: Wardzyńska
mesh_terms: D000535:Aluminum; D055664:Electrochemical Techniques; D004566:Electrodes; D005427:Flocculation; D017709:Fractals; D008962:Models, Theoretical; D012722:Sewage / Q000032:analysis*; D062065:Wastewater; D018508:Water Purification / Q000379:methods*
chemical_list: D000535:Aluminum; D012722:Sewage; D062065:Wastewater