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Abstrak :
Bakteri SM1_7 diketahui mampu mendegradasi senyawa hidrokarbon di dalam medium Bushnell-Haas dengan minyak diesel 1 v/v. Potensi bakteri SM1_7 diuji kembali dengan meningkatkan konsentrasi minyak diesel di dalam medium Bushnell-Haas. Penelitian ini bertujuan untuk mempelajari kemampuan degradasi senyawa hidrokarbon isolat bakteri SM1_7 dalam medium Bushnell-Haas yang ditambahkan minyak diesel 2 v/v. Pengukuran pertumbuhan bakteri dilakukan dengan metode total plate count dan analisis senyawa hidrokarbon menggunakan GC/MS. Hasil pengukuran pertumbuhan menunjukkan bahwa bakteri mampu tumbuh pada medium Bushnell-Haas dengan minyak diesel 2 v/v. Jumlah koloni bakteri SM1_7 meningkat dari 2,59 x 106 CFU/mL menjadi 8,66 x 108 CFU/mL setelah inkubasi 48 jam. Hasil analisis GC/MS menunjukkan bahwa terjadi degradasi senyawa alkana rantai lurus undecane sebesar 81,041, senyawa dodecane sebesar 37,180, dan senyawa tridecane sebesar 17,047. ......Bacterial Isolate SM1 7 has been shown to degrade hydrocarbons in Bushnell Haas with 1 diesel oil v v . The potential of bacteria isolate SM1 7 is reexamined by increasing concentration of hydrocarbon. The objective of this research is to observe the capability of bacteria isolate SM1 7 to degrade 2 diesel oil v v. Growth measurement was performed using total plate count method and analysis of hydrocarbon was carried out using GC MS. Results of growth measurements show that the bacterial isolate is capable of growing in Bushnell Haas medium with 2 diesel oil v v . The total number of bacteria increased from 2,59 x 106 CFU mL to 8,66 x 108 CFU mL after incubation period of 48 hours. Results of GC MS analysis show a decrease of linear alkane chain undecane 81,041, dodecane 37,18, and tridecane 17.047.

Abstrak :
Bakteri pendegradasi hidrokarbon dapat diisolasi dari daerah yang tercemar hidrokarbon. Tujuan dari penelitian ini adalah untuk mengisolasi bakteri pendegradasi hidrokarbon dan untuk mengetahui kemampuan isolat bakteri dalam mendegradasi senyawa hidrokarbon. Isolat bakteri B2 telah diisolasi dari sampel tanah pelabuhan Muara Angke. Pengukuran pertumbuhan dilakukan menggunakan metode Total Plate Count TPC dan analisa kemampuan degradasi hidrokarbon dilakukan dengan GC/MS. Hasil pengukuran pertumbuhan menunjukkan bahwa isolat bakteri B2 dapat tumbuh dalam medium dengan penambahan minyak diesel 1 v/v. Jumlah kenaikan koloni yang terbentuk dari 1,9x107 CFU/mL pada jam ke 0 menjadi 2,04x108 CFU/mL setelah inkubasi selama 120 jam. Hasil GC/MS menunjukkan 9 senyawa hidrokarbon yang terdegradasi adalah dodekana sebanyak 77,68, tridekana sebanyak 75,89, tetradekana sebanyak 62,86, pentadekana sebanyak 36,68, heksadekana sebanyak 48,77, heptadekana sebanyak 42,24, nonadekana sebanyak 37,11, tetrakosana sebanyak 42,01 dan naftalena sebanyak 69,36 . Karakterisasi bakteri dilakukan berdasarkan pengamatan mikroskopik, makroskopik dan reaksi biokimia. Hasil dari karakterisasi bakteri menunjukan bahwa isolat bakteri B2 diperkirakan berasal dari genus Bordetella. ......Hydrocarbon degrading bacteria can be isolated from hydrocarbon pollutedarea. The objectives of this experiment are to isolate hydrocarbon degrading bacteriaand to study the capability of bacterial isolate B2 in degrading hydrocarbon. BacterialIsolate B2 was isolated from Muara Angke soil in Bushnell Haas medium with 1 diesel fuel v v . Calculation of bacteria growth used the total plate count method whileanalysis of hydrocarbon degrading capability was examined by GC MS. The resultsshowed that bacteria B2 isolate was able to grow in media with addition of 1 dieselfuel v v. The total number of CFUs grew from 1,9x107 until 2,04x108 CFU mL. The result showed the degradation of 9 compounds, namely dodecane 77,68, tridecane75,89, tetradecane 62,86, pentadecane 36,68, hexadecane 48,77, heptadecane 42,24, nonadecane 37,11, tetracosane 42,01 and napthalene69,36 . Bacteria characterization was carried out by microscopic and macroscopicobservation and biochemical reaction. Characteritation showed that bacteria B2isolate is probably a member of the Genus Bordetella.

Abstrak :
[ABSTRAK
Alkana merupakan komponen senyawa hidrokarbon terbesar sebanyak 60% penyusun utama minyak bumi. Isolat bakteri potensial pendegradasi alkana telah diisolasi dari daerah perairan tercemar tumpahan minyak di Pulau Pari. Penelitian bertujuan untuk memeroleh isolat dengan kemampuan tinggi mendegradasi alkana. Pengukuran pertumbuhan isolat bakteri dilakukan pada ƛ 600 nm dan analisis degradasi alkana dengan metode GC/MS. Hasil penelitian menunjukkan bahwa dari 15 isolat yang diuji pertumbuhannya dengan menggunakan paraffin oil terdapat 2 isolat mewakili dua tipe kurva pertumbuhan yaitu isolat 97 kelompok I dengan pertumbuhan K(+) rendah (OD < 0,1 pada hari ke-12) dan isolat 19 kelompok II dengan pertumbuhan K(+) tinggi (OD ≥ 0,5 pada hari ke-12). Analisis degradasi alkana menunjukkan penurunan luas area pada isolat 97 dengan kemampuan degradasi docosane (C22H46) paling tinggi sebesar 96,04% dan isolat 19 dengan kemampuan degradasi hexadecane (C16H34) paling tinggi sebesar 61,37%. Identifikasi molekuler menggunakan 16S rRNA menunjukkan isolat 97 sebagai Pseudoalteromonas lypolitica dan isolat 19 sebagai Vibrio alginolyticus. ABSTRACT
Alkane is the largest hydrocarbon component of petroleum (60%). Potential alkane degrading bacteria have been isolated from oil contaminated waters at Pari Island. The study aims to obtain isolate with high capability of alkane degradation. The measurement of bacterial growth was performed at ƛ 600 nm and analysis of the alkane degradation with GC/MS method. Isolate 97 and 19 were selected out of 15 isolates with the highest growth represent the two groups of curve growth. Isolate 97 belong to group I with the low growth of K (+) OD <0.1 on day 12 and isolate 19 belong to group II with the high growth of K (+) ≥ 0.5 OD at day 12. The alkane degradation analysis showed isolate 97 had the highest decrease of docosane (C22H46) up to 96.04% and isolates 19 had the highest decrease of hexadecane (C16H34) up to 61.37%. The results of molecular identification using 16S rRNA indicate that isolate 97 and 19 were Pseudoalteromonas lypolitica and Vibrio alginolyticus respectively. ;Alkane is the largest hydrocarbon component of petroleum (60%). Potential alkane degrading bacteria have been isolated from oil contaminated waters at Pari Island. The study aims to obtain isolate with high capability of alkane degradation. The measurement of bacterial growth was performed at ƛ 600 nm and analysis of the alkane degradation with GC/MS method. Isolate 97 and 19 were selected out of 15 isolates with the highest growth represent the two groups of curve growth. Isolate 97 belong to group I with the low growth of K (+) OD <0.1 on day 12 and isolate 19 belong to group II with the high growth of K (+) ≥ 0.5 OD at day 12. The alkane degradation analysis showed isolate 97 had the highest decrease of docosane (C22H46) up to 96.04% and isolates 19 had the highest decrease of hexadecane (C16H34) up to 61.37%. The results of molecular identification using 16S rRNA indicate that isolate 97 and 19 were Pseudoalteromonas lypolitica and Vibrio alginolyticus respectively. , Alkane is the largest hydrocarbon component of petroleum (60%). Potential alkane degrading bacteria have been isolated from oil contaminated waters at Pari Island. The study aims to obtain isolate with high capability of alkane degradation. The measurement of bacterial growth was performed at ƛ 600 nm and analysis of the alkane degradation with GC/MS method. Isolate 97 and 19 were selected out of 15 isolates with the highest growth represent the two groups of curve growth. Isolate 97 belong to group I with the low growth of K (+) OD <0.1 on day 12 and isolate 19 belong to group II with the high growth of K (+) ≥ 0.5 OD at day 12. The alkane degradation analysis showed isolate 97 had the highest decrease of docosane (C22H46) up to 96.04% and isolates 19 had the highest decrease of hexadecane (C16H34) up to 61.37%. The results of molecular identification using 16S rRNA indicate that isolate 97 and 19 were Pseudoalteromonas lypolitica and Vibrio alginolyticus respectively. ]

Abstrak :
Bakteri yang berpotensi mendegradasi hidrokarbon dapat diperoleh dari tanah yang tercemar hidrokarbon. Penelitian bertujuan mendapatkan isolat bakteri dari sampel tanah tercemar hidrokarbon dan mengetahui kemampuan isolat bakteri tersebut dalam mendegradasi hidrokarbon. Isolasi dilakukan menggunakan medium Ilyina dkk. (2003). Identifikasi dilakukan dengan mengamati sifat morfologi dan aktivitas biokimia, sedangkan analisis hasil degradasi hidrokarbon dilakukan dengan GC/MS. Sebanyak 3 dari 9 isolat yang diperoleh dipilih untuk melihat kemampuan degradasi hidrokarbon, yaitu DT2 (Pseudomonas), DT5 (Citrobacter) dan DT8 (Enterobacter). Isolat DT2 dipilih untuk analisis hidrokarbon karena memiliki pertumbuhan paling baik dalam medium BSM + 1% hidrokarbon. Hasil pengukuran berat ekstrak minyak solar setelah penambahan Isolat DT2 menunjukkan penurunan sebesar 32,5%. Hasil analisis sisa senyawa hidrokarbon memperlihatkan penurunan luas area yang mengindikasikan penurunan konsentrasi senyawa yang diduga merupakan hexadecanoic acid, methyl ester dan n-heneicosane masing-masing sebesar 97,66% dan 96,79%. Hydrocarbon degrading potential bacteria can be isolated from hydrocarbon contaminated soil. This research aims to obtain bacterial isolates from hydrocarbon contaminated soil and study the hydrocarbon degradation capabilities of selected isolates. Isolation was carried out using Ilyina et al. (2003) medium. Bacterial identification was performed based on morphological and biochemical characterizations, while GC/MS was used for analysis of hydrocarbon degradation capabilities. Nine isolates were obtained and three of them were selected to examine hydrocarbon degradation capability, namely DT2 (Pseudomonas), DT5 (Citrobacter) and DT8 (Enterobacter). The DT2 isolate was selected for analysis of hydrocarbon degradation because it has the highest growth in BSM medium + 1% hydrocarbon. The results from weight measurements of diesel oil extract after the addition of DT2 isolates showed a decrease of 32.5%. The results of hydrocarbon degradation analysis showed decrease in the area that indicate a decrease in concentration of compounds suspected to be hexadecanoic acid, methyl ester and n-heneicosane respectively 97.66% and 96.79%.