PERBEDAAN DAYA LAMPU ULTRAVIOLET-C TERHADAP PENURUNAN JUMLAH BAKTERI COLIFORM PADA AIR BERSIH DI INDUSTRI LOGAM

Untari Ratna Ningsih, Dewi and Karmini, Mimin and Hidayah, Nurul (2021) PERBEDAAN DAYA LAMPU ULTRAVIOLET-C TERHADAP PENURUNAN JUMLAH BAKTERI COLIFORM PADA AIR BERSIH DI INDUSTRI LOGAM. Jurnal Riset Kesehatan Poltekkes Depkes, 13 (2). pp. 422-426. ISSN 1979-8253

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Abstract

Tap water at metalIndustry does not meet the requirements because it is contaminated with coliform bacteria, so adisinfection process using ultraviolet-clight is needed. The purpose of the researchistostudy the relationship betweenthe power of ultraviolet-c lamps and thedecreasing of coliform bacteriapopulationin tap water. The ultraviolet-clamp power used is 15 watts, 30 watts, and 36 watts, a wavelength of 254 nm and a contact time of 45 seconds. This type of research is a true experiment with 6 repetitions and the research design is pre-posttest without control. The sampling technique is grab sampling. The population is tap water in ground tank 1, the sample is part of tap water in ground tank 1, the sample size is 36samples. The data analysis isOne Way Anova test. The results showed that 15 watts, 30 watts, and 36 watts ultraviolet-clamps could reduce the number of coliform bacteria by up to 100%. The ANOVA test results showed that P value is 0.134 (P > 0.05), which means that there wasno difference in lamp power to decrease the number of coliform bacteria in tap water. The industry can apply adisinfection process using ultraviolet-clight to reduce the number of coliform bacteria in tap water. Further researchersare advised to use a lower ultraviolet-clamp power.

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