%0 Journal Article
%T Efeito da oxigena£¿£¿o por agita£¿£¿o manual da ¨¢gua na efici¨ºncia de inativa£¿£¿o de coliformes termotolerantes utilizando luz solar para desinfec£¿£¿o em batelada
%A Botto
%A M¨¢rcio Pessoa
%A Mota
%A Francisco Suet£¿nio Bastos
%A Ceballos
%A Beatriz Susana Ovruski de
%J Engenharia Sanitaria e Ambiental
%D 2009
%I Brazilian Association of Sanitary and Environmental Engineering
%R 10.1590/S1413-41522009000300008
%X this study aimed at evaluating the manual agitation effect on inactivation efficiency of thermotolerant coliforms of water bottles submitted to solar disinfection. agitated bottles and non-agitated bottles were exposed to sunlight from 9:00 a.m. to 3:00 p.m. dissolved oxygen (do) and thermotolerant coliforms concentrations were analyzed hourly. the solar disinfection improved the water quality, reducing thermotolerant coliforms concentration by 4 logs (from 1.0 x 106 to 2.6 x 101mpn/100 ml). with the manual agitation, there was considerable oxygenation in the water samples (maximum of 6.61 mg/l in samples with manual agitation and of 5.56 mg/l for those without agitation), but the increase in do had no significant effect on the inactivation of thermotolerant coliforms (p>0.05).
%K bacterial decay
%K pet bottles
%K solar radiation
%K dissolved oxygen.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1413-41522009000300008&lng=en&nrm=iso&tlng=en