Water Disinfection of Rural Communities by Solar Radiation: Effects of the Bottle Material

The present study used the fecal coliform and heterotrophic plate count (HPC) tests to evaluate the efficiency of solar disinfection ininactivating fecal coliforms in the drinking water of the rural communities of Kamyaran County, Kurdistan, Iran. The fecal coliformandHPCtests determined the bacteriological content of the samples to be approximately equal to ۱۱۰۰MPN/۱۰۰mLandgreater than۲۰۰ CFU/۱۰۰ mL, respectively. The contaminated water was subjected to solar radiation under a similar exposure time in ۳ differentbottles: Bright glass, dark glass, and PET (plastic bottle). The dark bottle glass conferred a more desirable disinfection efficiencythan did the other ۲ bottles, probably on the strength of its superior ability to accumulate the solar heat and light by restrictinglight passage and, thus, to inactivate higher values of fecal coliform and HPC bacteria.

کلیدواژه ها:

Water Disinfection ، Solar Radiation ، Bottle Material