Analysis Of Biofilm Formation Potential As Microbiological Impact On Cooling Tower Of Geothermal Power Plant In Kamojang, Indonesia

Cahaya Prautama, Anggi Galih, Budi Wibowo, Ade Sumarna, Irfan Dwidya Prijambada


The microbiological factors are an important aspect for the geothermal power plant. It was reported in 2005 that microbiological aspects could cause losses of $ 500,000 annually because microbial had the ability to form biofilms attached to the critical components in geothermal, especially pipes and cooling tower so give impacts to bio-corrosion, reducing energy efficiency by clogging hydraulic system, and inhibit heat transfer, hence to decrease the microbiological impacts required a study to test the potential of biofilm formation on cooling tower at Geothermal Power Plant (PT Indonesia Power UPJP Kamojang, Indonesia). The methodology in this research was approached by Total Plate Count (TPC) analysis, biofilm formation analysis, microbial diversity analysis using Shannon Index and morphological analysis using Image-J, Biofilm Coverage Rates (BCR) analysis and statistic test analysis using tukey method. Based on the results of the study showed the value of total bacteria in cold basin in cooling towers one to three (cfu / ml) 5.85 x 102, 3.1 x 102 and 14.9 x 102 with diversity index 2.8355a, 3.7414a and 2.2895a, BCR (%) 49.63a, 30.21ab, 25.59ab and control 13.82b The results obtained required the maintenance process of cooling tower from microbiological aspects to avoid the potential of biofilm formation which resulted in the loss for the company.

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