CONSORTIUM BACTERIA APPLICATION FOR ULTRASONIC WAVE MICROBIAL ENHANCED OIL RECOVERYYuliani, Bambang Yudono, Eddy Ibrahim and Hary WidjajantiAbstract The Microbial Enhanced Oil Recovery process using several bacteria or consortium of bacteria is a potential method of obtaining crude oil in a reservoir. Biosurfactants as secondary metabolites of consortium I bacteria (Bhurkholderiaglumae, Pseudomonas fluorescence, Pseudomonas citronellolis) and consortium II bacteria (Bhurkholderiaglumae, Pseudomonas peli, Pseudomonas citronellolis) with time variations of ultrasonic, NaCl and pH in a temperature range of 70 °C and 90 °C is applied to recover oil. The sonication process uses digital ultrasound at 20 kHz. The best results were obtained from the results of oil recovery at 2 minutes of ultrasonic transmission, 6% NaCl, and pH 7 for consortium I bacteria (59.28%). The best temperature was 70 °C for consortium II bacteria (52.76%). Consortium bacteria in ultrasonic wave emission have the potential to increase oil recovery. |