title: Biodegradability of industrial textile wastewater - batch tests.
abstract: Following new trends we applied oxygen uptake rate (OUR) tests as well as long-term tests (in two batch bioreactors systems) in order to assess the biodegradability of textile wastewater. Effluents coming from a dyeing factory were divided into two streams which differed in inorganic and organic contaminants loads. Usefulness of the stream division was proved. Biodegradation of the low-loaded stream led to over 97% reduction of biochemical oxygen demand (BOD5) together with 80% reduction of chemical oxygen demand (COD) and total organic carbon (TOC). Most of the controlled parameter values were below the levels allowed by legislation for influents to surface water, whereas the high-loaded stream was so contaminated with recalcitrant organic compounds that despite the reduction of BOD5 by over 95%, COD, TOC, total nitrogen and total phosphorus levels exceeded permissible values. OUR tests were aimed at determination of the following kinetic parameters: maximum specific growth rate (μMax), half-saturation constant, hydrolysis constant and decay coefficient for activated sludge biomass for both types of textile wastewater studied. The values of kinetic parameters will be applied in activated sludge models used for prediction and optimisation of biological treatment of textile wastewater.
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland E-mail: katarzyna.pazdzior@p.lodz.pl.
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Paździor
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland E-mail: katarzyna.pazdzior@p.lodz.pl.
authors.forename: Anna
authors.initials: A
authors.lastname: Klepacz-Smółka
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland E-mail: katarzyna.pazdzior@p.lodz.pl.
authors.forename: Julita
authors.initials: J
authors.lastname: Wrębiak
authors.affiliation: Institute of Environmental Engineering and Building Installations, Lodz University of Technology, Al. Politechniki 6, 90-924 Lodz, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Liwarska-Bizukojć
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924 Lodz, Poland E-mail: katarzyna.pazdzior@p.lodz.pl.
authors.forename: Stanisław
authors.initials: S
authors.lastname: Ledakowicz
mesh_terms: D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D019149:Bioreactors; D004396:Coloring Agents; D007220:Industrial Waste / Q000032:analysis*; D009584:Nitrogen / Q000378:metabolism; D010758:Phosphorus; D012722:Sewage / Q000737:chemistry; D013783:Textile Industry; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D007220:Industrial Waste; D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater