|
Abstract : |
Samples of water were collected from seven different localities and subjected to bacterial examination. The addition of silver nitrate at different concentration and its bactericidal effect was observed, fifteen minutes after addition. The tests were conducted for bacteriologic analysis of water through plate counts and also for the presence of coliform organisms. The microbial examination of untreated water samples showed remarkable variation in total viable count and coliform organisms. The total viable count and coliform in untreated water ranged from 38 x 105 - 135 x 105/ml and 6 - 150/100ml, respectively. When the addition of silver (as silver nitrate) was done at a concentration of 50 ?g/L, bacteria were altogether absent in almost all the water samples., |
