Pengaruh Penambahan Aditif Ocimum Basilicum pada Biodiesel B100 terhadap Pertumbuhan Bakteri dan Performa Mesin Diesel

Rochmah, Atika Salsabila (2025) Pengaruh Penambahan Aditif Ocimum Basilicum pada Biodiesel B100 terhadap Pertumbuhan Bakteri dan Performa Mesin Diesel. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Biodiesel merupakan energi terbaharukan yang digunakan sebagai alternatif bahan bakar pada mesin diesel yang ramah lingkungan dikarenakan terbuat dari minyak nabati dan lemak hewani. Namun biodiesel memiliki kecenderungan toksisitas yang lebih rendah sehingga biodiesel lebih rentan mengalami kontaminasi bakteri. Penelitian ini dilakukan untuk menganalisis pengaruh penambahan 1% zat aditif alami dari minyak kemangi terhadap pertumbuhan bakteri pada biodiesel B100 serta pengaruhnya terhadap performa mesin diesel. Dihasilkan bahwa aditif terbukti efektif menurunkan jumlah bakteri, dari kisaran 250 CFU/ml menjadi 7 CFU/ml. Penambahan aditif mampu mempengaruhi properties bahan bakar, pada minggu ke-8 dari minggu ke-0, B100 aditif mengalami penurunan bilangan asam yang lebih sedikit masing-masing sebesar 10,04% dan 11,47%, B100 aditif mengalami peningkatan viskositas yang lebih sedikit masing-masing 4,13% dan 19,02%, B100 aditif mengalami penurunan densitas yang lebih sedikit masing-masing 0,780% dan 0,782%, B100 aditif memiliki nilai kalor lebih kecil pada minggu ke-4 dan minggu ke-8 masing-masing sebesar 0,48% dan 0,19%. Penambahan aditif dapat mempengaruhi performa mesin diesel, pada minggu ke-8 memiliki daya dan torsi lebih tinggi dibandingkan B100 murni, masing-masing 4,214 kW, 3,915 kW dan 22,340 Nm, 18,702 Nm, memiliki SFOC yang lebih rendah pada minggu ke-8 dibandingkan B100 murni masing-masing 306,56 g/kWh dan 322,91 g/kWh.
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Biodiesel is a renewable energy source used as an alternative to diesel fuel in environmentally friendly diesel engines because it is made from vegetable oils and animal fats. However, biodiesel has a lower toxicity, making it more susceptible to bacterial contamination. This study was conducted to analyse the effect of adding 1% natural additive from ocimum basilicum or basil oil on bacterial growth in B100 biodiesel and its impact on oxidative stability and diesel engine performance. The results showed that the additive was effective in reducing bacterial counts from 250 CFU/ml to 7 CFU/ml. The addition of the additive affected the fuel properties. By week 8 from week 0, B100 with the additive experienced a smaller decrease in acid number, respectively by 10.04% and 11.47%, and a smaller increase in viscosity, respectively by 4.13% and 19.02%. B100 additives experienced a smaller decrease in density of 0.780% and 0.782%, respectively, and B100 additives had lower calorific values at week 4 and week 8 of 0.48% and 0.19%, respectively. Additives can affect diesel engine performance, in week 8, it had higher power and torque compared to pure B100, at 4.214 kW, 3.915 kW, and 22.340 Nm, 18.702 Nm, respectively, and had a lower specific fuel consumption (SFOC) in week 8 compared to pure B100, at 306.56 g/kWh and 322.91 g/kWh, respectively.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bakteri, Biodiesel, Kemangi, Performa
Subjects:	Q Science > QP Physiology > QP517.B5 Biodegradation. Q Science > QR Microbiology > QR74.8 Bacteria T Technology > TJ Mechanical engineering and machinery > TJ165 Energy storage. T Technology > TJ Mechanical engineering and machinery > TJ797 Diesel motor--Fuel systems--Testing.
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Atika Salsabila Rochmah
Date Deposited:	05 Aug 2025 04:40
Last Modified:	05 Aug 2025 04:40
URI:	http://repository.its.ac.id/id/eprint/127378

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