AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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Autori: ANCA FARKAS, BRÎNDUȘA BOCOȘ, MIHAIL DRĂGAN-BULARDA, CORNELIA CRĂCIUNAȘ.
Drinking water biofilms represent a potential reservoir for water contamination. The biofilm mode of life provides multiple advantages for its inhabitants, including specific mechanisms of resistance against antimicrobials. The aim of the present study is to assess the effect of several disinfectants on biofilm consortia. The experiment was set in order to address the most stringent issues in drinking water systems: biofilms resilience, microbial diversity and bacterial resistance. Four chlorine-based agents commonly used in drinking water treatment (sodium dichloroisocyanurate, sodium hypochlorite, chloramine-T and chlorine dioxide) and one mixed cleaning agent (containing sulphamic acid, hydrochloric acid, hydrogen peroxide and acetic acid) were tested for their antibacterial properties. The assessment of disinfectants’ efficacy on a wide variety of bacteria brings novel outcomes. The average log reduction values (LRV) indicated the mixed cleaning agent as the most efficient product in bacterial inactivation (LRV = 3.673), followed by sodium dichloroisocyanurate (LRV = 1.122), sodium hypochlorite (LRV = 0.979), chloramine-T (LRV = 0.885) and chlorine dioxide (LRV = 0.657).
Keywords: biofilm bacteria, drinking water, chlorine-based disinfectants, mixed cleaning agents
