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All Journal At Turots: Jurnal Pendidikan Islam Dedikasi: Jurnal Pengabdian kepada Masyarakat Journal of Biobased Chemicals (JOBC) InSTEM
Istiqomah Rahmawati
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Religion Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Mathematics Physics Social Sciences Other

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Extraction of Phenolic Active Compounds from Coffee Leaves (Coffea sp.) Using the Ultrasound-Assisted Extraction Method and Total Phenol Analysis Nur Aini Dwi Alfinaini; Boy Arief Fachri; Pratamai Shelli; Helda Wika Amini; Istiqomah Rahmawati
JOBC Vol. 3 No. 1 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

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Coffea sp. is one of the largest plantation commodities in Indonesia, especially coffee leaves containing phenolic compounds. This research was conducted to extract phenolic compounds using the Ultrasound-Assisted Extraction method with ethanol solvent, which aims to determine the optimum operating conditions of extraction and the influence of variations in amplitude, time, and ratio of solvents used. The experimental design used Design Expert 13 software with the response surface method box-Behnken design. The research variables used were amplitude variations (50%, 60%, and 70%), time (10, 20, and 30 minutes), and solvent ratios (0.1, 0.15, and 0.2 g/mL). Based on our study, these parameters affect the total phenolic content. The model equation for the total phenolic content of coffee leaves obtained is Y = 0.1349 – 0.0016 A – 0.0505 B + 0.0010 C + 0.0018 AB + 0.0043 AC – 0.0018 BC – 0.0004 A2 + 0.0178 B2 – 0.0014 C2 (R2 = 0.9758) with the optimum total phenolic content located in the 17th running of 0.209 mg GAE/g under conditions of 20 minutes, the ratio of material to solvent is 0.2 g/mL, and an amplitude of 50%.
Efficient Anthocyanin Extraction from Aqueous Mixture of Cocoa Peel using Microwave Assisted Extraction (MAE) Method Nurtsulutsiyah; Yakub Hendrikson Manurung; Istiqomah Rahmawati
JOBC Vol. 3 No. 1 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

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Anthocyanins are polyphenolic compounds that are abundant in nature, with diversity in various types of plants. This study aimed to optimize the anthocyanin extraction process from cocoa shell waste using the MAE method to obtain the optimum particle size, ingredient/solvent ratio, and extraction time to produce high anthocyanin concentrations. The optimized extraction process variables include the size of the particle (1.05; 1.25; 1.49 and 2.5 x 10-4 m), the ratio of substrate/solvent (4.5; 12.5; 62.5; 79.5 x 10-3 g/mL), time of extraction (2, 4, 10, 14 minutes) and microwave power (100, 275, 450, and 625 watts). The Design Expert vs11 program with the Box-Behnken Design Response Surface Methodology (RSM) was used in the research, and the selection of process conditions was carried out from a combination of factors that resulted in an optimal response. The relationship between variables on the modeled anthocyanin concentration response: Y=0.000486-9.98637E-07A+0.026734B0.000041C-7.58240E-07D-0.000102AB+2.48606E-07AC+2.62878E09AD-0.000539BC+0.000012BD+9.71853E08CD (A: particle size; B: cocoa shell: solvent ratio; C: extraction time; D: microwave power). The optimal response value for anthocyanin concentration was 11.85.10-4 M, and the conditions of the extraction process were the particle size in the extraction process was 0.105 mm, the ratio of cocoa peel mass/ethanol was 0,03125 g/mL, the extraction time was 2 minutes, and the microwave power was 100 W.
Turmeric Leaves Extraction (Curcuma Longa L.) as a Natural Preservative Using Ultrasound-Assisted Extraction (UAE) Method Isni Salma Salsabillah; Rossi Agnessi Pebriana; Bekti Palupi; Ditta Kharisma Yolanda Putri; Istiqomah Rahmawati
JOBC Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : University of Jember

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Turmeric leaves (Curcuma longa L.) contain phytochemical compounds that can be utilized as natural food preservatives or bioformalin due to their antibacterial properties. The extraction method used in this study is Ultrasound-Assisted Extraction (UAE), to determine the effect of variable sample-solvent ratio, time, and particle size on total flavonoid, tannin, and alkaloid compounds, as well as to determine the optimal shelf life of fresh tuna. This study used sample-solvent ratio variables of 1:10, 1:15, and 1:20; time variables of 10, 20, and 30 minutes; and particle size variables of 60, 80, and 100 mesh. The highest total flavonoid compound was obtained in the variable sample-solvent ratio of 1:20, the particle size of 100 mesh, and the time of 20 minutes at 98.076 mg/L. The highest total tannin compound was obtained in the variable sample-solvent ratio of 1:15, the particle size of 60 mesh, and the time of 10 minutes at 41.697 mg/L. The highest total alkaloid compound was obtained in the variable sample-solvent ratio of 1:10, the particle size of 100 mesh, and the time of 20 minutes at 10.092 mg/L. The optimum curing time for tuna is 36 hours at room temperature with variable sample-solvent ratio, time, and particle size of 1:20 g/mL, 20 minutes, and 100 mesh with 20% concentration. The running has the highest flavonoid compounds, so it can be concluded that flavonoid compounds have a major effect on the preservation process of tuna.
Extraction of Anthocyanins from Dragon Fruit Peel Using Solvent Extraction Method Mohammad Fathur Rohman Y.; Shariska Putri Devina; Boy Arief Fachri; Istiqomah Rahmawati; Zuhriah Mumtazah
JOBC Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : University of Jember

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Abstract

Dragon fruit skin contains 26.4587 mg/L anthocyanins. Anthocyanins have benefits such as natural coloring agents in the food sector and are used as an alternative to synthetic dyes which are of course also safer for health. The purpose of this study was to determine the effect of extraction variables (time, solvent concentration, and particle size) on the anthocyanin content of dragon fruit skin from the extraction results with the Solvent Extraction method. The definition of Solvent Extraction is the separation of materials from a solid or liquid with the help of a solvent. The extraction process starts from the agglomeration of the extract with the solvent then contact occurs between the material and the solvent so that on the flat plane of the interface of the extraction material and the solvent there is mass deposition by diffusion. The extraction process starts with 25 grams of dragon fruit peel powder with a variety of particle sizes (30, 60, and 80 mesh) then put into an Erlenmeyer tube. Then, the citric acid solution with various concentrations (0.1 M; 0.2 M; and 0.3 M) was added as much as 250 ml. After that, the Erlenmeyer was placed on a stirrer to stir for (90, 120, and 150 minutes). After that, the extraction results were filtered using filter paper to produce a filtrate. Then the filtrate was precipitated to obtain anthocyanin extract. After that, it was analyzed using the spectrophotometric method to calculate anthocyanin content. In this study, the best results were obtained at 11.439 mg/L in conditions without repetition. The optimum conditions of extraction were obtained at a particle size of 60 mesh, a time of 150 minutes, and a solvent concentration of 0.5 M citric acid.
Evaluation of the Effectiveness of Biofilter Columns with Mixed Media for Tofu Liquid Waste Treatment Tazkia Maulida Putri; Zahwa Annaya; Mutiara Dewi Rukmana; Silvia Devi Eka Putri; Istiqomah Rahmawati
JOBC Vol. 5 No. 1 (2025): Journal of Biobased Chemicals
Publisher : University of Jember

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Indonesia's increasing number of tofu industries has led to a rise in waste volume from this sector, requiring exceptional management. Tofu wastewater, a byproduct of tofu production that is no longer utilized, contains a high concentration of organic matter and can adversely affect water supplies if discharged untreated. This study aims to investigate an efficient filtration technique using filtration media for processing tofu wastewater. The biofilter column used in this study was made from a Le Minerale gallon and comprised layers of zeolite, bio balls, bearings, and activated charcoal to filter and purify the water from organic substances. The results showed that while filtration effectively reduced Total Dissolved Solids (TDS) from 995 ppm to 129 ppm after the fourth filtration, it was ineffective in neutralizing the pH of the tofu wastewater, which remained at pH 4 before and after filtration. This indicates that the wastewater remains acidic and cannot be directly discharged into the environment. Additionally, conductivity and salt levels increased after multiple filtrations, possibly due to ion release from the filter materials or saturation effects. This study reveals that the column configuration and filtration materials used were ineffective in removing acidic components from tofu wastewater. Therefore, design adjustments and filtration media selection are needed to achieve better results in treating tofu wastewater.
Co-Authors Abdurrahman Auf Afred, Merymistika Yufrani Agus Wedi Pratama Alfinaini, Nur Aini Dwi Alfinaini Amalia Ramadhan Amelia Permata Ayunda Amellyah Isna Ainaiyah Andreyan Poerwo Negoro AYU WULANDARI Bekti Palupi Boy Arief Fachri Dianavita Fatimah Ditta Kharisma Yolanda Putri Erna Subroto Felix Arie Setiawan Hakiki, Rizki Maulana Helda Wika Amini Isni Salma Salsabillah Lutsi, Nurtsulutsiyah Meta Fitri Rizkiana Mochamad Ghaza Al Ghifari Moh. Ariz Iqramullah Mohammad Fathur Rohman Y. Mutiara Dewi Rukmana Mutiara Rengganis Nurul Putri Azhari Naily Fatimatuz Zaroh Nico Dimas Saputro Nur Aini Dwi Alfinaini Nurtsulutsiyah Pratamai Shelli Putri Agustin, Mawardhi Nabilla Relyando, Syahfa Adinda Richa Febyola Surya Putri Rima Arianti Rizki Fitria Darmayanti Rossi Agnessi Pebriana Safinatin Najjah Salma, Isni Salma Salsabillah Sekar Jasmin Azzahra Sella Violina Anggraeni Shariska Putri Devina Silvia Devi Eka Putri Silvia Devi Eka Putri Slamet Pujianto Syahfa Adinda Relyando Syeikh Maulana Bima Suci Tazkia Maulida Putri Tiana Febrianti Eka Prasetyani Tri Elok Setya Megasari Widiyanto Yakub Hendrikson Manurung Zahwa Annaya Zuhriah Mumtazah Zulkarnain