This study was planned to determine the microbiological quality and the physical dirtiness in recycled demijohns used in a drinking water filling facility. For this purpose, a total of 388 polycarbonate, recyclable demijohn samples (19 L) were obtained from the facility during the spring and summer seasons (March-August 2009) periodically. A l l demijohs were examined physically for the presence of dirt, and i f present, the dirt samples were analyzed for total mesophilic aerobic bacteria. Additionally, all demijohns were analyzed for the presence of total mesophilic aerobic bacteria, Staphylococcus aureus, Escherichia coli and coliform bacteria. As a result, 91 (23.45%), 8 (2.06%), and 37 (9.53%) out of 388 demijohn samples were found to be contaminated with coliform bacteria, E. coli and, S. aureus, respectively. Also, physical dirtiness was detected in 77 (19.84%) samples examined. In conclusion, the physical dirtiness increases the microbiological levels at certain rates in recycled demijohns and also negatively influences the effectiveness of cleaning and disinfection processes. Results of this study indicate that, the recycled polycarbonate demijohns are the main contamination source of water and the hygienic quality of drinking water is closely related with the cleanliness of demijohns.
ÖZET
Bu araştırma, bir içme suyu dolum tesisinde kullanılan, o işletmeye ait geri dönüşümlü damacanaların içerdiği fiziksel kirliliklerin ve mikrobiyolojik kalitenin belirlenmesi için planlanmıştır. Bu amaçla, düzenli olarak ilkbahar ve yaz ayları (Mart-Ağustos 2009) boyunca haftada bir kere işletmeye gidilerek alınan toplam 388 adet geri dönüşümlü 19 litrelik polikarbon damacana örneği incelenmiştir. Tüm damacana örnekleri fiziksel olarak muayene edildikten sonra, kir olan damacanalardan alınan örnekler toplam aerob mezofil bakteri sayısı yönünden analiz edilmiştir. Ayrıca tüm damacana örnekleri toplam aerob mezofil bakteri, Escherichia coli, Staphylococcus aureus ve koliform grubu bakteri sayısı yönünden incelenmiştir. Buna göre, damacanaların 77 (%19,84) tanesinde fiziksel kirlilik tespit edilmiş olup, 91 (%23,45) tanesinde koliform grubu bakteri, 8 (%2,06) tanesinde E. coli ve 37 (%9,53) tanesinde S. aureus tespit edilmiştir. Sonuç olarak, içme suyu doldurularak piyasaya tekrardan verilecek damacanaların içermiş oldukları fiziksel kirliliklerin belirli oranda damacanaların mikroorganizma seviyelerini yükselttiği ve temizlik-dezenfeksiyon işleminin etkinliğini negatif yönde etkilediği; tüketime sunulan içme sularının hijyenik kalitesinin damacana temizliği ile yakından ilgili olduğu ve suların en önemli kontaminasyon kaynaklarından birinin geri dönüşümlü polikarbon damacanalar olduğu bulunmuştur.
Anahtar Kelimeler: İçme suyu dolum tesisi, damacana, mikrobiyolojik kalite, fiziksel kirlilik
ABSTRACT
INVESTIGATION OF PHYSICAL DIRTINESS AND MICROBIOLOGIC QUALITY OF RECYCLED DEMIJOHNS USED IN A DRINKING WATER FILLING FACILITY
This study was planned to determine the microbiological quality and the physical dirtiness in recycled demijohns used in a drinking water filling facility. For this purpose, a total of 388 polycarbonate, recyclable demijohn samples (19 L) were obtained from the facility during the spring and summer seasons (March-August 2009) periodically. All demijohs were examined physically for the presence of dirt, and if present, the dirt samples were analyzed for total mesophilic aerobic bacteria. Additionally, all demijohns were analyzed for the presence of total mesophilic aerobic bacteria, Staphylococcus aureus, Escherichia coli and coliform bacteria. As a result, 91 (23.45%), 8 (2.06%), and 37 (9.53%) out of 388 demijohn samples were found to be contaminated with coliform bacteria, E. coli and, S. aureus, respectively. Also, physical dirtiness was detected in 77 (19.84%) samples examined. In conclusion, the physical dirtiness increases the microbiological levels at certain rates in recycled demijohns and also negatively influences the effectiveness of cleaning and disinfection processes. Results of this study indicate that, the recycled polycarbonate demijohns are the main contamination source of water and the hygienic quality of drinking water is closely related with the cleanliness of demijohns.
Key Words: Drinking water filling facility, demijohn, microbiological quality, physical dirtiness
Primary Language | Turkish |
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Journal Section | Research Article |
Authors | |
Publication Date | November 15, 2012 |
Published in Issue | Year 2013 Volume: 39 Issue: 1 |