Effect of Retention Time On Quality Clarified Oil In Continuous Settling Tank (cst) at PT. XYZ

Abstract

A One of the units at the clarification station is the Continuous Settling tank. Continuous Settling tanks area place where the crude oil is separated from the crude oil tank. Continuous Settling tank works for separate oil from sludge based on differences in specific gravity, where the lighter fraction is the oil is at the top while the heavier sludge is at the bottom. Retention time (time stay ) is the length of time the oil is stuck in the CST tank starting from the time the oil enters until it exits tank. The longer the oil is in the CST, the greater the precipitation that occurs. so that the resulting separation is getting better and the sludge will settle to the bottom of the tank. The purpose of this study is to determine the relationship between retention time and percentage (%) dirt content, water content and oil content in clarified oil and find out the best residence time for produce CST oil output of the highest quality. This research was conducted with a variation of retention times 4, 5 and 6 hours . The results showed that the best quality of oil (clarified oil) was obtained at retention time of 6 hours with a yield of 99.499% oil, 0.475% water and 0.06% dirt.