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All Journal Bulletin of Chemical Reaction Engineering & Catalysis CHEMPUBLISH JOURNAL UNEJ e-Proceeding JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya JMM (Jurnal Masyarakat Mandiri) Warta Pengabdian CHEESA: Chemical Engineering Research Articles Jurnal Teknologi Jurnal Pengabdian Kepada Masyarakat MEMBANGUN NEGERI Bulletin of Chemical Reaction Engineering & Catalysis
Helda Wika Amini
Prodi Teknik Kimia, Universitas Jember
Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

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Journal : UNEJ e-Proceeding

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EXTRACTION OF ROBUSTA COFFEE HUSK WASTE FROM TANAH WULAN VILLAGE MAESAN DISTRICT BONDOWOSO DISTRICT WITH ETHYL ACETATE AND ITS ANTIOXIDANT ACTIVITIES Helda Wika Amini; Wiwik Pratiwi; Gregah Pangayoman Hartanto P; Bekti Palupi; Boy Arief Fachri; Meta Fitri Rizkiana; Istiqomah Rahmawati
UNEJ e-Proceeding 2022: E-Prosiding Kolokium Hasil Penelitian dan Pengabdian kepada Masyarakat
Publisher : UPT Penerbitan Universitas Jember

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Abstract

Indonesia is the 4th largest coffee-producing country in the world. One of the coffee producers in the Bondowoso area of ​​East Java is Tanah Wulan Village. This village is located in the Argopuro Mountains Cluster, which produces coffee, especially Robusta coffee. In processing coffee cherries into coffee beans, the husk of the coffee cherries becomes the most significant waste from this process, reaching 40%-45%. However, the use of coffee husk waste is still limited as fertilizer and animal feed. So that there is a need for research to explore the potential of abundant coffee husk waste, one of which is about the antioxidant potential of robusta coffee husk produced in Tanah Wulan village. This study aimed to determine the percentage yield of robusta coffee husk extraction with ethyl acetate solvent and analyze its antioxidant activity. The robusta coffee husk extraction with ethyl acetate produces a dark green solid with a yield of 1.09%. From the analysis of antioxidants using DPPH, the IC50 was obtained at 96.5 mg/L with a strong category of antioxidants. However, the antioxidant activity of coffee husk extract is still much lower than the comparison compound for vitamin C, with an IC50 value of 3.68 mg/L (powerful category). So that, further research needs to be done to increase the antioxidant activity of coffee husk waste.
The EFFECT OF MICROORGANISM NUTRITION ON THE FERMENTATION PROCESS ON BIOETHANOL CONCENTRATION FROM TOBACCO STALKS Bekti Palupi; Boy Arief Fachri; Istiqomah Rahmawati; Meta Fitri Rizkiana; Helda Wika Amini; Nikita Meidi; Dini Rahmawaty
UNEJ e-Proceeding 2022: E-Prosiding Kolokium Hasil Penelitian dan Pengabdian kepada Masyarakat
Publisher : UPT Penerbitan Universitas Jember

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Tobacco is one of the abundant biomass resources, especially in Jember Regency. Tobacco stalk has potential as a raw material for bioethanol and has more economic value than just being used as firewood. One of the new renewable energy that comes from biomass is biofuel. The currently developed biofuels are biodiesel and bioethanol. Compared to fuel oil, bioethanol's advantages include having a high octane number (106-110), increasing combustion efficiency, and reducing pollutant emissions. Besides being used to fulfill energy needs, bioethanol can also be used as a raw material in the pharmaceutical, cosmetic, and various alcohol derivatives industries. The Covid-19 pandemic has also made the need for ethanol increase. The scarcity of hand sanitizer products has made the price soar. The raw material for the hand sanitizer is ethanol, so the need for ethanol also increases. Bioethanol production, in general, has a 4-step process. The processes are pretreatment, hydrolysis, fermentation, and distillation. This study focused on the fermentation process with the aim of knowing the effect of microorganism nutrition on the concentration of bioethanol from tobacco stalks. Fermentation is done with the yeast Saccharomyces Cerevisiae. The addition of nutrients in the fermentation process greatly affects the concentration of ethanol that will be produced. The addition of optimal nutrients in this study was shown in the addition of 1.3% of the total initial volume of the sample or 0.325gram with a concentration result of 23.9%. Keywords: bioethanol, microorganism nutrition, fermentation, tobacco stalks
Co-Authors Afidatul Muadifah Ari Susanti Atiqa Rahmawati Bekti Palupi Bimo Bayu Aji Boy Arief Fachri Dini Rahmawaty Ditta Kharisma Yolanda Putri Ditta Kharisma Yolanda Putri Dyah Ayu Savitri Felix Arie Setiawan Gregah Pangayoman Hartanto P Hanggara Sudrajat Husnatun Nihayah Indra Lasmana Tarigan Istiqomah Rahmawati Kiki Septianti Meta Fitri Rizkiana Mizanurafi’ Ghifarhadi Prasiefa Muhammad Reza Muhammad Rizalluddin Muharja, Maktum Nikita Meidi Nurtsulutsiyah Nurtsulutsiyah Nurul Ulya Luthfiyana Rizki Fitria Darmayanti Syarifah, Ratna Dewi Tri Kurnia Astutik Wiwik Pratiwi Yakub Hendrikson Manurung