Sunlight inactivation of enterococci and fecal coliforms in sewage effluent diluted in seawater.

摘要: Inactivation (loss of culturability) by sunlight enterococci and fecal coliforms within sewage effluent diluted in seawater was investigated field experiments. In most experiments, 500-ml flasks pure silica were used to confine activated sludge 2% (vol/vol) seawater. bacteria these (diameter, 0.1 m) faster than either open chambers (depth, 0.25 or patches dyed (depth order, 1 m), probably because the longer light paths latter two types experiment, which caused greater attenuation sunlight. 90% generally required 2.3 times insolation for inactivation coliforms, both presence larger initial shoulders on survival curves a lower final rate. Two parameters are model enterococci, shoulder constant as well rate coefficient. The depth dependence indicators matched profile UV-A radiation at about 360 nm. UV-B (290 320 nm), penetrates much less into seawater, is minor importance compared with visible sunlight, contrary expectations consideration published action spectra bacterial inactivation.