2007, Cilt 37, Sayı 4, Sayfa(lar) 213-220 |
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Investigation of a possible microbiologic contamination in an drinking water interprise |
Meryem Akhan1, Ömer Çetin2 |
1Akademik Hijyen Ltd. fiti. Beylikdüzü, İstanbul 2İstanbul Üniversitesi Veteriner Fakültesi, Besin Hijyeni ve Teknoloji Anabilim Dalı, İstanbul |
Keywords: Water filling plant, microbiological contamination, total mesophilic aerobic bacteria, coliform, Escherichia coli |
In this study, microbiological hazard points of water were investigated from the start point of spring to the drinkable final
product, was performed in a spring water filling plant. On the other hand, demijohns and the washing water of the demijohns
were also analized. The total bacteria counts, coliform and E. coli analises were applied to the water samples according to
2005 dated regulation. The total bacteria counts in 65 % of the samples collected from spring, 60% of the samples collected
from discus membrane filter, 90 % of the samples collected from reverse osmosis system, 10 % of the samples collected from
clean water keeping pools, 60 % of the samples collected from filling taps and 50 % of the samples collected from filled demijohns
found to be acceptable according to the values given in the regulation. No coliform and Escherichia coli were detected
in the samples collected from spring, discus membrane filter, reverse osmosis system, clean water keeping pools. Coliform
counts were over the limit values given in the regulation in 15 % and 10 % of the samples collected from filling taps and filled
demijohns, respectively. Escherichia coli was detected from none of the collected samples.It was concluded that the most
important contamination source in the plant was insufficient cleaned and disinfected dirty polycarbon demijohns.
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