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Table 3

Removal of coliforms during different exposure time of water in unpainted PET bottles

Fecal indicatorsFecal indicator density prior SODIS (log cell no/100 mL)
Average fecal indicators after SODIS (log cell no/100 mL)
Exposure time  0 h 3 h 6 h 9 h 
Unpainted bottles TCs 3.25 0.075 (97.7%) 0.032 (99%) 0.023 (99.3%) 
FCs 2.67 0.189 (93%) 0.065 (97.6%) 0.043 (98.4%) 
Painted bottles TCs 3.25 0.055 (98.3%) 0.003 (99.9) 0.032 (99%) 
FCs 2.699 0.108 (96%) 0.032 (98.6%) 0.016 (99.4%) 
Fecal indicatorsFecal indicator density prior SODIS (log cell no/100 mL)
Average fecal indicators after SODIS (log cell no/100 mL)
Exposure time  0 h 3 h 6 h 9 h 
Unpainted bottles TCs 3.25 0.075 (97.7%) 0.032 (99%) 0.023 (99.3%) 
FCs 2.67 0.189 (93%) 0.065 (97.6%) 0.043 (98.4%) 
Painted bottles TCs 3.25 0.055 (98.3%) 0.003 (99.9) 0.032 (99%) 
FCs 2.699 0.108 (96%) 0.032 (98.6%) 0.016 (99.4%) 

Bold values represent the percentage removal of coliform at different exposure time of water in unpainted PET bottles.

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