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Ni’matuzahroh Ni’matuzahroh
Department of Biology, Faculty of Science and Technology, Universitas Airlangga
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Materials Science & Nanotechnology Medicine & Pharmacology

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The potency of Micrococcus sp. L II 61 bacteria as oil sludge cleaning agent Ni’matuzahroh Ni’matuzahroh; Intan Ayu Pratiwi; Tini Surtiningsih; Fatimah Fatimah; Sri Sumarsih
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 22 No 2 (2017): June 2017
Publisher : The East Java Biological Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (500.394 KB) | DOI: 10.23869/56

Abstract

This research aimed to reveal the ability of Micrococcus sp. L II 61 bacteria that was isolated from Pegirian Surabaya as oil cleaning agent. This is an experimental research to detect the presence of biosurfactant and lipase enzyme in culture supernatant of Micrococcus sp. L II 61 with aliphatic hy-drocarbon (cooking oil) as a substrate growth. Biosurfactant production was evaluated by measuring the surface tension of supernatant using tensiom-eter du Nouy and measuring the emulsification activity value using diesel oil as hydrocarbon test. Lipase enzyme was detected by measuring lipolitic activity value of crude enzyme (culture supernatant) by using p-nitrofenil palmitic (p-npp) as a substrate test. Data were analyzed descriptively. The results showed that Micrococcus sp. L II 61 produced biosurfactant with surface tension decreasing of culture supernatant up to 30.27 ± 1.17 mN/m compared than aquadest and value of hydrocarbon emulsification activity (AE 1 hour) up to 20.24 ± 0.68 %. Culture of Micrococcus sp. L II 61 after 16 hours incubation have a lipolytic activity 33.53 ± 0.14 U/mL at pH 7 and 37 oC. Supernatant of Micrococcus sp. L II 61 100% (v/v) give the high-est percentage of oil sludge solubility, i.e. 86.38 ± 2.39%. Micrococcus sp. L II 61 is a highly potential to be developed as oil sludge cleaning agent.
Co-Authors Fatimah Fatimah Intan Ayu Pratiwi Sri Sumarsih Tini Surtiningsih