|Setyo Sarwanto Moersidik||Civil Engineering Department, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok 16424, Indonesia|
|Zoraya R. Pratiwi||Civil Engineering Department, Faculty of Engineering, Universitas Indonesia, Kampus Baru UI Depok 16424, Indonesia|
|Zulkifliani||Research and Development Centre for Oil and Gas Technology LEMIGAS Cipulir, Jakarta 12230, Indonesia|
Oil-Spill Dispersant (OSD) reduces interfacial tensions of oil and water
turning oil spill into droplets that makes crude oil easier to be
degraded by hydrocarbonoclastic bacteria such as Pseudomonas aeruginosa.
The purpose of this study is to assess the effect of dispersant
utilization (solvent-based and water-based) related its performance
efficiency in the presence of Pseudomonas aeruginosa. The research was
carrried out in laboratory, varying Dispersant-Oil Ratio (DOR) into 3
levels (1:8, 1:20, 1:25) and carbon source adaptation into 3 levels (0%,
1%, 2%). The total number of samples prepared was 84, consist of 21
samples without Pseudomonas aeruginosa addition and 63 samples with
Pseudomonas aeruginosa addition. Total petroleum hydrocarbon (TPH) is
measured using gravimetric method to determine the biodegradation of
crude oil. Also measured are pH of samples with Pseudomonas aeruginosa
addition and COD (Chemical Oxygen Demand) value of samples with
dispersants. Data were evaluated using ANOVA. The result shows
Pseudomonas aeruginosa has the ability to degrades crude oil despite the
presence of dispersant, whereas the use of water-based dispersant
showed better biodegradation ability than solvent-based OSD usage.
Dispersant effectiveness of solvent-based and water-based is 33% and
biodegradation by Pseudomonas aeruginosa achieved 25% in 72 hours.
Biodegradability, Contaminated Seawater Remediation, Oil-based Dispersant, Pseudomonas aeruginosa, Solvent-based Dispersant