Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Effect of photoactive dye on bacteria contained in activated sludge

Miroslava Smolinská *, Alžbeta Takáčová a

Department of Environmental Engineering, Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, Bratislava 812 37, Slovak Republic
a VÚRUP, a.s., Vlčie hrdlo, 820 03 Bratislava, Slovak Republic

E-mail: *

Abstract: In this paper we focus on the evaluation of toxicity and phototoxicity of phenothiazine dye methylene blue on selected bacteria (Escherichia coli CCM 3988, Pseudomonas aeruginosa CCM 3955, Salmonella enterica ssp. Enterica serovar Enteritidis CCM 4420 and Bacillus subtilis CCM 1999), which are part of the activated sludge. The results obtained demonstrate that the induction of photodynamic effect is showed. Increased photoantibacterial activity may lead to inhibition of bacterial metabolic activity in the sludge. This effect may represent a potential risk to the ongoing processes in wastewater treatment.

Keywords: methylene blue, bacteria, photodynamic effect, activated sludge

Full paper in Portable Document Format: acs_0125.pdf

Acta Chimica Slovaca, Vol. 5, No. 2, 2012, pp. 164—168