PENGARUH CARA PENYIMPANAN TERHADAP KUALITAS MIKROBIOLOGI AIR : Penelitian Pada Wadah Berbahan Dasar Tanah Liat dan Plastik

Abstract

Background: The storage process can affect water quality. Containers used to store water are made from plastic and clay. Clay is known to have antibacterial activity. This study aimed to determine the effect of storage on microbiological quality of water. Methods: This was a laboratory experimental study conducted in Microbiology Laboratory of Medical Faculty of Diponegoro University in Semarang. Subjects was water from six wells, five samples from tap water and five samples of drinking water in several regions of Semarang city. Data were the amount of colon count. Data analyzed by using SPSS 17.0 for windows with independent t-test to compared the colony count in water in the clay vessel and plastic jug. Paired t-test is used to compared the colony count in water before and after storage. Result:The highest mean of initial colony count (34510 cfu/ml), colony count of water stored in clay vessel (46810 cfu/ml) and colony count of water stored in plastic jug (36700 cfu/ml) were found in the samples of drinking water. The result of colony count analysis among those stored in clay vessel and plastic jug were not significantly different for samples from wells (p=0,515), tap water (p=0,612) and drinking water (p=0,195). The analysis of colony count of water from wells (p=0,007) and drinking water (p=0,001) before and after stored in clay vessel were increased significantlyt, but didn’t differ significantly in the samples of tap water (p=0,205). The colony count analysis before and after storage in plastic jug were increased significantly in the samples from wells (p=0,003) and drinking water (p=0,001), but didn’t differ significantly in the samples of tap water (p=0,201). Conclusion: Clay vessel and plastic jug didnot affect the microbiological quality of water.