INTEGRATION OF BIOREMEDIATION AND ELECTROKINETIC REMEDIATION FOR PETROLEUM HYDROCARBON DEGRADATION IN PETROLEUM CONTAMINATED SOIL

• Main Author: Hafizhan Hamid, Muhammad
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/81080
• Institution: Institut Teknologi Bandung

Exploration, exploitation, transportation and processing of petroleum have supported the development of global welfare, but in the process petroleum hydrocarbon pollution often occurs in the environment which can affect the quality and health of the environment and society. This pollution needs to be restored by remediation. Biological methods have been used in the treatment of soil pollution by petroleum, including bioaugmentation by utilizing exogenous microbes for pollution remediation. This laboratory-scale research was carried out in two phases, namely the biostimulation-bioaugmentation stage and the biostimulationbioaugmentation stage combined with electrokinetic method. Phase 1 utilizes biostimulation by adding nutrients in the form of NPK fertilizer, and bioaugmentation with five variations of bacterial concentration: 0%, 2.5%, 5%, 7.5% and 10% to remediate soil artificially contaminated with petroleum. The bioaugmentation process was combined with biostimulation and then TPH and TPC were observed for 28 days. Phase 2 utilizes the best variation from the results of stage 1 combined with electrokinetic treatment by using 3 voltage variations: 1V/cm, 2V/cm and 3V/cm. Electrokinetic treatment was carried out for 24 hours, followed by biostimulation-bioaugmentation for 28 days. At both stages, monitoring of pH, temperature and water content is also carried out so that the system is in the optimum range for biodegradation (6-8.5; 18-45o C; 16-42.5%). Phase 1 test results showed that bioremediation experienced the highest efficiency with the addition of a bacterial concentration of 10%, followed by concentrations of 7.5%, 2.5%, 5% and 0% which showed efficiencies of 81%, 73%, 72%, 71% and 69% respectively. The results of the 2nd stage test using a bacterial concentration of 10% showed that electrokinetic treatment increased the efficiency of soil remediation by biostimulation-bioaugmentation, with the highest efficiency with electrokinetic treatment with a voltage of 3V/cm (93-94%), followed by 2V/cm (92- 93% ) and 1V/cm (90-93%)