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Istiqomah Rahmawati
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Journal of Biobased Chemicals (JOBC)
Published by Universitas Jember
ISSN : 27463257     EISSN : 27462544     DOI : https://doi.org/10.19184/jobc.v2i1.116
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
The scopes of this journal include the following topics: 1. Components extract from bioresources 2. Chemical and physical processing of biomass 3. Biobased materials and composites 4. Biobased energy production 5. Catalyst technology for biomass conversion 6. Biological processing of bioresources, chemicals and waste 7. Treatment of biobased chemical waste 8. Application of the biobased chemical products to the target users 9. System analysis, management, and environmental protection of biobased chemical processing This journal does not consider the topics about organic chemicals from non-organism, crops and breeding, organism modification, metabolic engineering, bioresources and environmental management which do not relate to biobased chemical processing.
Arjuna Subject : Teknik Kimia (semua kategori) - Bioengineering
Articles 30 Documents
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Ekstraksi Senyawa Flavonoid pada Daun Sirih Merah (Piper Crocatum) menggunakan Metode Ultrasound-Assisted Extraction (UAE) Pramudiska, Riavinola Viyoni; Amartya, Audi Nur; Yolanda, Ditta Kharisma; Mumtazah, Zuhriah; Palupi, Bekti
Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v3i2.395

Abstract

Sirih merah merupakan salah satu tanaman obat yang dikenal akan kandungan antioksidannya yang baik untuk menjaga kesehatan tubuh. Salah satu jenis antioksidan yang terkandung dalam sirih merah adalah flavonoid. Pada penelitian ini dilakukan ekstraksi terhadap daun sirih merah menggunakan metode Ultrasound-Assisted Extraction (UAE) dengan tujuan untuk menganalisis kadar flavonoid serta aktivitas antioksidan pada daun sirih merah. Digunakan pelarut Etanol 90% dengan variabel ekstraksi yang digunakan adalah rasio bahan dengan pelarut, ukuran partikel, dan waktu ekstraksi yang ditentukan menggunakan software Design Expert13. Uji flavonoid dilakukan dengan Spektrofotometer Uv-Vis dengan panjang gelombang 431 nm. Analisa aktivitas antioksidan dilakukan dengan DPPH (2,2-Diphenyl-1-picrylhydrazyl). Didapatkan hasil kadar flavonoid tertinggi sebesar 263,676 mgQE/gr pada kondisi operasi optimum ukuran partikel sebesar 100 mesh, rasio bahan dengan pelarut sebesar 0,06, dan waktu ekstraksi selama 25 menit.
Artikel Review: Produksi Bioetanol dari Limbah Biomassa dengan Fermentasi Menggunakan Bantuan Yeast Pratiwi, Wiwik; Ni Made, Suaniti
Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v3i2.421

Abstract

Bioethanol is an ethanol compound made from biomass containing starch, sugar and cellulose. The most common production of bioethanol uses hydrolysis and fermentation methods. The following article aims to compare the levels of bioethanol produced from various types of biomass using various methods. The method used can be in the form of variations in the concentration of acids and bases used in hydrolysis, fermentation time and the mass of yeast used. The results of the review of the article found that the highest levels of bioethanol were obtained from bioethanol made from banana peels by hydrolysis and fermentation methods. The glucose level produced was 3.13% and the bioethanol content obtained was 13.54% with a fermentation time of 144 hours. Keywords: Bioethanol, Fermentation, Hydrolysis, Yeast, Glucose
A Evaluation of the Effect of Microalgae Chlorella vulgaris on the Performance of Membrane Bioreactor for Industrial Wastewater Treatment Faqih, Hana; Raygita May Hastuti; Zuhriah Mumtazah; Helda Wika Amini; Meta Fitri Rizkiana
Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v3i2.428

Abstract

Water pollution, especially from industry, is a problem that continues to emerge and even get worse. Rising sludge events often occur in industrial wastewater treatment processes. Process engineering with the addition of microalgae is proposed in this study to overcome the occurrence of rising sludge and improve wastewater quality based on dissolved oxygen levels. The control variables used were MLSS 1000 mg/L, microalgae Chlorella vulgaris 106 L, and urea and TSP 1,75 kg each. The dependent variable is rising sludge and DO levels while the independent variable is time. This research went through several stages, namely seeding microalgae, seeding microalgae into activated sludge in MBBR, experimenting with combining microalgae and activated sludge in MBBR, and installing ultrafiltration membranes with a WWTP capacity of 150 m3/day. The addition of microalgae in the MBBR process has a positive impact in improving the quality of industrial wastewater, which is characterized by the absence of rising sludge and DO levels exceeding the minimum threshold.
Ekstraksi Minyak Atsiri pada Daun Jeruk Manis (Citrus Aurantium) dengan Menggunakan Metode Microwave Hydrodistilation (MHD) Putri Agustin, Mawardhi Nabilla; Andreyan Poerwo Negoro; Ditta Kharisma Yolanda Putri; Meta Fitri Rizkiana; Istiqomah Rahmawati
Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v3i2.435

Abstract

Penelitian ini bertujuan untuk memanfaatkan daun jeruk manis yang hanya merupakan limbah yang tidak memiliki nilai, dimana daun jeruk manis merupakan salah satu bahan yang memiliki kandungan minyak atsiri. Selain kulitnya, ternyata daun jeruk manis ini juga dapat diekstrak menggunakan metode Microwave Hydrodistillation (MHD). Penelitian ini menggunakan tiga variabel yaitu; rasio F/S yang digunakan 0,375 g/mL ; 0,5 g/mL ; 0,65 g/mL, daya 150 watt, 300 watt dan 450 watt, serta waktu 30,60, dan 90 menit. Metode ekstraksi dilakukan menggunakan bahan segar (fresh) dengan volume solvent sebanyak 200ml. Adapun pengujian yang dilakukan ialah uji GC-MS. Dari hasil metode uji dan tujuan penelitian ini adalah untuk mengetahui kadar limonen pada ekstraksi daun jeruk manis menggunakan metode MHD dengan variasi rasio, daya dan waktu. Hasil optimum minyak atsiri pada daya 300 W, waktu 90 menit dan rasio 0,625 dengan hasil yield 0,373%. Komponen terbesar yang dihasilkan pada ekstraksi daun jeruk metode MHD ialah Germacrene D 29,51%, Alpha-Copaene 18,47%, CIS-CAROPHYLNE 15,42%, 9-Eicosene (E) 8,58% dan Limonen 5,51%.
Optimalisasi Pemanfaatan Abu Ampas Tebu Untuk Pembuatan Paving Block Muharja, Maktum; Helgananta Adirya Sabian; Mutiara Rengganis Nurul Putri Azhari
Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v3i2.440

Abstract

Salah satu industri gula memproduksi abu ampas tebu dalam jumlah yang banyak. Abu ampas tebu pada industri gula tersebut belum dapat dimanfaatkan. Abu ampas tebu memiliki kandungan silika yang cukup tinggi yakni sebesar 68,5% dapat dimanfaatkan sebagai bahan pengganti untuk mengurangi penggunaan semen pada pembuatan paving block. Pada penelitian ini pembuatan batu bata beton menggunakan metode pressing manual. Paving block terbuat dari pasir, semen, abu ampas tebu, abu batu dan air. Perbandingan semen, abu batu dan pasir menggunakan perbandingan 1:2:6 dengan variasi abu ampas tebu 10, 20 dan 30%. Hasil pengujian didapatkan batu bata beton mutu tertinggi pada pengeringan hari ke-7 dengan 214 kg/cm2 mendapatkan mutu B berdasarkan SNI 03-0691-1996 dan kuat tekan batu bata beton yang dihasilkan akan semakin meningkat seiring bertambahnya waktu pengeringan. Inovasi ini dapat meningkatkan kegunaan pada abu ampas tebu dan menjadi peluang bisnis baru untuk industri gula.
Optimasi Reaksi Transesterifikasi pada Sintesis Biodiesel dari Minyak Goreng Limbah Katering Rumah Tangga: Transesterifikasi Putri, Putri Eka Yulianda; Chaerobina Bida Ayu Bestari
Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v4i1.813

Abstract

Biodiesel is an alternative energy source for diesel engines or diesel fuel which is carried out using the transesterification method. Used cooking oil is reacted with methanol which will produce methyl ester and glycerol with the help of a base catalyst in the form of NaOH. The aim of this research is to optimize the biodiesel obtained. The synthesis reaction for biodiesel was carried out at temperatures of 55°C, 60°C, 65°C and with varying times of 60, 90, and 120 minutes, with a volume ratio of used cooking oil-methanol, namely 1:4, 1:5, and 1; 6. The highest yield was 61.9404% and ANOVA (Analysis of Variance) was proven to be significant and fulfilled as in the Design Expert 13 Software.
kopi robusta Hidrolisis Limbah Kulit Kopi Robusta Berbantuan Microwave Sebagai Bahan Baku Gula Reduksi Iriel, Khairur Rahman Ilyas; Mizan, Mizanurafi’ Ghifarhadi Prasiefa; M. Iqbal Samudra
Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v4i1.818

Abstract

Proses hidrolisis merupakan suatu proses pemecahan zat dengan mereaksikan menggunakan udara, tujuannya untuk mengurai zat tersebut. Fokus penelitian ini pada proses hidrolisis untuk mengetahui kadar gula pereduksi Limbah kulit kopi. Metode yang digunakan adalah hidrolisis dengan bantuan gelombang mikro . Metode ini dapat meningkatkan pelepasan lignin lebih efektif dibandingkan metode konvensional pada proses hidrolisis selulosa dan hemiselulosa. Hidrolisis yang paling sering digunakan untuk menghidrolisis selulosa adalah hidrolisis secara asam. Penelitian ini menggunakan bahan baku limbah kulit kopi (kulit tanduk) yang mengandung selulosa dan hemiselulosa dengan pelarut HCl. Hidrolisis dengan konsentrasi asam adalah (1, 2, dan 3%), daya microwave (150, 300, dan 450 W), dan waktu (20, 25, dan 30 menit). Pada penelitian ini diperoleh hasil gula pereduksi yang optimal sebesar 8,054 g/mL pada kondisi waktu operasi 25 menit, konsentrasi HCl 3%, dan daya microwave 450 Watt.
Extraction of Turmeric Leaves (Curcuma longa L.) as a Natural Preservative for Tuna Fish Using Ultrasound-Assisted Extraction (UAE) Method Salma, Isni Salma Salsabillah; Rossi Agnessi Pebriana; Bekti Palupi; Ditta Kharisma Yolanda Putri; Istiqomah Rahmawati
Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v4i1.822

Abstract

Turmeric leaves (Curcuma longa L.) contain phytochemical compounds that can be utilized as natural food preservatives or bioformalin due to its antibacterial properties. The extraction method used in this study is Ultrasound-Assisted Extraction (UAE), with the aim 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, particle size of 100 mesh, and 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, particle size of 60 mesh, and 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, particle size of 100 mesh, and 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.
Ekstraksi Antosianin Buah Naga Menggunakan Metode Solvent Extraction Rohman Yulianto, Mohammad Fathur; Devina, Shariska Putri
Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v4i1.841

Abstract

Dragon fruit peel contains 26.4587 mg/L of anthocyanin. Anthocyanins have benefits such as natural dyes in the food sector and are used as an alternative to synthetic dyes which are of course also safer for health. The aim of this research was to determine the effect of extraction variables (time, solvent concentration, and particle size) on the anthocyanin content of dragon fruit peel from extraction results using the Solvent Extraction method. In general, the definition of Solvent Extraction is a technique of separating one or several materials from a solid or liquid with the help of a solvent. So, Solvent Extraction is the transfer of a dissolved substance (solute) between two solvents that do not mix with each other. The extraction process begins with the coagulation of the extract with the solvent, then contact occurs between the material and the solvent so that on the flat surface of the interface between the extraction material and the solvent, mass deposition occurs by diffusion. The extraction process starts with 25 grams of dragon fruit peel powder with varying particle sizes (30, 60, and 80 mesh) then put into an Erlenmeyer tube. Then 250 ml of citric acid solution was added with varying concentrations (0.1 M; 0.2 M; and 0.3 M). After that, the Erlenmeyer flask is placed on the stirrer to stir for (90, 120, and 150 minutes). After that, the extraction results are filtered using filter paper to produce a filtrate. Then the filtrate is precipitated to obtain anthocyanin extract. After that, it was analyzed using a spectrophotometric method to calculate anthocyanin levels. In this study, the best results were obtained, namely 11.439 mg/L. With optimal extraction conditions at a particle size of 60 Mesh, time of 150 minutes, and a solvent concentration of 0.5 M citric acid.
Extraction of Polyphenols from Horn Banana Peel (Musa Paradisiaca var. Typica) Using the Ultrasound Assisted Extraction Method Sugesta, Muhammad Yongki Ivan; Wibowo, Revi Setia; Alfiah, Masrurotul; Reza, Muhammad; Achmad Sjaifullah
Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jobc.v4i1.957

Abstract

Banana peel contains starch, protein, fat, total fiber, unsaturated fatty acids, pectin, amino acids, polyphenols and micronutrients. Horn banana peelhas many benefits, namely it can be processed into a natural antioxidant material that can minimize banana skin waste. The banana peel extraction method used is Ultrasound Assisted Extraction. Ultrasound Assisted Extraction at optimal conditions produces good levels of total polyphenols with a short extraction time. In the use of ultrasonic no additional chemicals or other materials are needed. This study aims to determine the effect of extraction time (10, 20, 30 minutes), extraction temperature (20, 30, 40℃) and solvent ratio (gr/mL) (1:25, 1:30, 1:35) on polyphenols. The Design Expert V13 program with Response Surface Methodology (RSM) Box-Behnken Design (BBD) was used to determine the combination of extraction parameters that lead to optimal results for total polyphenol content. Based on the research that has been done, it can be stated that the extraction parameters affect the total polyphenol content. The highest total polyphenol content was 61,007 mg GAE/g sample with the extraction conditions at an extraction temperature of 30℃, an extraction time of 30 minutes, and a ratio of banana peel powder to a dissolution of 1:30 g/mL. Keywords : Banana Peel, Polyphenols, Ultrasound Assisted Extraction

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