Profil Kelarutan Limbah Minyak Bumi dalam Air dengan Penambahan Surfaktan Anionik dan Laju

Abstract

Abstract- Petroleum waste is a major problem in environmental impact control. Just a few microbial species could be used to degradated hydrocarbon compound in petroleum waste due to the fact that water (containing microbes) does not perfectly mix with petroleum waste. However, this problem could be solved by adding surfactant into the system. Addition of surfactant would make oil dispersed into water, facilitating good contact between microorganism and petroleum carbon source as its feed. In this research, Linear Alkylbenzene Sulphonate (LAS) and Natrium Dodecyl Sulphate (NDS) were used as surfactants. The observed parameters were surfactant concentrations and stirring rates. Surfactant concentration was determined from surface tension value and emulsion stability. The highest emulsion stability for LAS observed was 1.58 % at concentration of 0.04%, while for NDS equal to 0.45% at concentration of 0.15%. Stirring rates were applied 100, 120, and 140 rpm, successively based on liquid total petroleum hydrocarbon (TPH) value. Liquid TPH value at rate 100, 120, and 140 rpm for LAS and NDS were 0.68, 0.72, 1.33 and 0.80, 1.01, 1.68%, successively. Liquid TPH value depicted much oils was dispersed into water. The other parameter such as solid TPH and chemical oxygen demand (COD) obtained for 140 rpm rate was 10.20% and 33258 mg/L for LAS while for NDS equal to 9.12% and 35909 mg/L. In this research can be concluded that the use of LAS is better than the NDS beacuse LAS is higher emulsion stability (1:58%) compared to the NDS (0.45%) and based on ANOVA, LAS and NDS resulted not significantly different.