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All Journal Info-Teknik CHEESA: Chemical Engineering Research Articles Share : Journal of Service Learning Jurnal Rekayasa Hijau Infotekmesin INTEGRITAS : Jurnal Pengabdian Buletin LOUPE (Laporan Umum Penelitian) Bubungan Tinggi: Jurnal Pengabdian Masyarakat Madani : Indonesian Journal of Civil Society Jurnal Abdimas Sangkabira Jurnal Pengabdian Barelang Journal of Science and Social Development
Rosita Dwityaningsih
Politeknik Negeri Cilacap
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mechanical Engineering Social Sciences Other

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Pengaruh Komposisi Bahan Baku dan Kadar Perekat Tepung Tapioka Terhadap Kualitas Briket dari Campuran Daun Ketapang dan Tempurung Kelapa Hanan Izdihar Rashif Hunsa; Rosita Dwityaningsih; Ilma Fadlilah; Zhilal Shadiq; Sari Sekar Ningrum
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2483

Abstract

Ketapang leaves are an example of biomass that can be used to make briquettes. However, ketapang leaves produce a low calorific value, so they require additional ingredients to increase the calorific value, one of which is coconut shell. This research aims to evaluate how variations in raw material composition and adhesive content of tapioca flour affect the quality of briquettes on the parameters of calorific value, water content, ash content, volatile substances, fixed carbon content, and density. The method applied in this research involved mixing ketapang leaf charcoal and coconut shell charcoal, then adding adhesive in the form of tapioca flour. The study results showed that all the briquettes tested met SNI 8966-2021 standards except for the density parameter. The conclusion of this study is that the greater the composition of the briquette raw materials and the lower the adhesive content of tapioca flour, the better the quality of the briquettes. The mixed briquettes that produce the best quality are composed of 20% Ketapang leaf charcoal and 80% coconut shell charcoal. The tapioca flour adhesive that delivers the best quality briquettes is at a percentage of 5%.
Isolasi Senyawa Tiofen dari Bunga Tahi Ayam (Tagetes spp) Sebagai Odoran Gas LPG Rosita Dwityaningsih; Zhilal Shadiq; Mohammad Nurhilal; Ayu Pramita; Septian Hanjaya
Infotekmesin Vol 17 No 2 (2026): Infotekmesin: Juli 2026
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/

Abstract

Liquefied Petroleum Gas (LPG) is a mixture of propane and butane gases. LPG is characterized by being colorless and odorless, requiring an additive to act as an indicator of a leak in the gas cylinder, allowing it to spread into the air. The additive currently used as an odorant in LPG is ethyl mercaptan, a volatile liquid with a strong, pungent odor characteristic and highly stable, making it difficult to decompose in the air. However, this compound has drawbacks because the resulting aroma is difficult to detect, thus tending to irritate breathing and reduce user comfort. Therefore, it is necessary to isolate compounds from more environmentally friendly natural materials to become alternative odorants in LPG to replace ethyl mercaptan. One natural material that can be a source of compounds with strong aroma characteristics is the Tagetes spp. plant, which contains thiophene in its roots and leaves, making it a natural source of strong-smelling compounds. The results of this study were that the largest yield was obtained from the root extract with petroleum ether solvent of 5.85%, a corrosion rate of 6.63 µg/cm2.hour, and an odor level of 42. The high yield directly correlates with elevated odor intensity without inducing excessive corrosion, demonstrating the potential of Tagetes spp. root extract as a superior and safe natural odorant candidate.
Co-Authors Anis Aziza Zumroturrida Ayu Pramita Ayu Pramita Camelia Amandasari Dodi Satriawan Elis Rosida Evila Purwanti Sri Rahayu, Theresia Fadlilah, Ilma Hanan Izdihar Rashif Hunsa Ilma Fadlilah Kartini Megasari Khoeruddin Witriansyah Mardiyana Mardiyana Mohamad Arifin Mohammad Nurhilal Murni Handayani Nurlinda Ayu Triwuri Nuryati Nuryati Oto Prasadi Radhi Ariawan Saipul Bahri Sari Sekar Ningrum Sari, Eka Dyah Puspita Septian Hanjaya Sheptia Whiting Hayati Siti Khuzaimah Taufan Ratri Harjanto Theresia E. P. S Rahayu Ulikaryani, Ulikaryani Zhilal Shadiq