cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Istiqomah Rahmawati
Contact Email
istiqomah.rahmawati@unej.ac.id
Phone
+6285649555784
Journal Mail Official
jobc@unej.ac.id
Editorial Address
Jl. Kalimantan no 37 – Kampus tegal boto Jember Jawa Timur 68121, INDONESIA
Location
Kab. jember,
Jawa timur
INDONESIA
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 92 Documents
 5   6   7   8   9 
Extraction of Essential Oils from Sweet Orange Leaves (Citrus aurantium) Using the Microwave Hydrodistillation (MHD) Method Mawardhi Nabilla Putri Agustin; Andreyan Poerwo Negoro; Ditta Kharisma Yolanda Putri; Meta Fitri Rizkiana
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to utilize sweet lime leaves, which are only waste that has no value, where sweet lime leaves are one of the ingredients that contain essential oils. Apart from the skin, it turns out that this sweet lime leaf can also be extracted using the Microwave Hydrodistillation (MHD) method. This study uses three variables: the F/S ratios used were 0.375 g/mL, 0.5g/mL, and 0.65 g/mL, the powers used were 150 watts, 300 watts, and 450 watts, and the times used were 30, 60, and 90 minutes. The extraction method uses fresh ingredients with a solvent volume of 200 ml. The test carried out is the GC-MS test. The results of the test method and the purpose of this study were to determine the limonene content in the extraction of sweet lime leaves using the MHD method with variations in ratio, power, and time. The optimum yield of essential oils is at a power of 300 W, 90 minutes, and a ratio of 0.625, with a yield of 0.373%. The most significant components produced in the MHD method of extracting citrus leaves were Germacrene D 29.51%, Alpha-Copaene 18.47%, CIS-CAROPHYLNE 15.42%, 9-Eicosene (E) 8.58% and Limonene 5.51%.
Article Reviews: Bioethanol Production from Biomass Waste Using Fermentation with The Assistance of Yeast Wiwik Pratiwi; Ni Made Suaniti
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Bioethanol is a biomass-based ethanol compound 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 multiple methods. The process can vary in the concentration of acids and bases used in hydrolysis, fermentation time, and yeast mass. The article review results found that the highest bioethanol content was obtained from bioethanol made from bagasse, with an ethanol content of 41% by adding 1% sodium hydroxide to dextrose agar (PDA) media.
Influence of Chlorella vulgaris Microalgae on the Performance of Membrane Bioreactors for Industrial Wastewater Treatment Raygita May Hastuti; Hanan; Zuhriah Mumtazah; Helda Wika Amini; Meta Fitri Rizkiana
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research evaluated the Effect of Hydraulic Residence Time and Organic Loading Rate in a Microalgal Membrane Bioreactor for Wastewater Treatment. One method of treating industrial wastewater combines an anoxic procedure with a Moving Bed Biofilm Reactor (MBBR). In this study, process engineering is combined with microalgae to boost dissolved oxygen levels and counteract the rise in sludge. This study combines process engineering with microalgae to mitigate growing sludge and enhance wastewater quality as measured by dissolved oxygen levels. MLSS 1000 mg/L, Chlorella vulgaris microalgae 106 L, and 1.75 kg of urea and TSP were the microalgae concentrations utilized. The quality of industrial wastewater is positively impacted by adding microalgae in the MBBR process. The quality of industrial wastewater is positively affected by adding microalgae in the MBBR process. Adding microalgae caused the dissolved oxygen level to rise over the minimal threshold. Additionally, when wastewater is being treated, microalgae might lessen the chance of increasing sludge in the MBBR.
Optimization of Sugarcane Bagasse Ash for Paving Blocks Production Helgananta Adirya Sabian; Mutiara Rengganis Nurul Putri Azhari; Maktum Muharja
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

One of the sugar industries produces large quantities of bagasse ash. Sugarcane bagasse ash in the sugar industry cannot yet be utilized. Sugarcane bagasse ash has a relatively high silica content, namely 68.5%, which can be used as a substitute material to reduce the use of cement in making paving blocks. In this research, concrete bricks were made using the manual pressing method. Paving blocks are made from sand, cement, bagasse ash, stone ash, and water. The cement, stone ash, and sand ratio is 1:2:6, with variations in bagasse ash of 10, 20, and 30% of the sand composition. The test results showed that the highest quality concrete bricks were on the 7th day of drying, with 214 kg/cm2, getting quality B based on SNI 03-0691-1996, and the compressive strength of the resulting concrete bricks would increase as the drying time increased. This innovation can improve the usability of bagasse ash and become a new business opportunity for the sugar industry.
Extraction of Flavonoid Compounds from Red Betel (Piper crocatum) Using Ultrasound-Assisted Extraction (UAE) Method Riavinola Viyoni Pramudiska; Audi Nur Amartya; Ditta Kharisma Yolanda Putri; Zuhriah Mumtazah; Bekti Palupi
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Piper crolatum or red betel is one of the medicinal plants known for its beneficial antioxidant content in maintaining overall health. One of the types of antioxidants found in red betel leaf is flavonoids. In this study, red betel leaf was extracted using the Ultrasound-Assisted Extraction (UAE) method to analyze the flavonoid content and antioxidant activity in the red betel leaf. A 90% ethanol solvent was used, and the extraction variables included the ratio of material to solvent, particle size, and extraction time, which were determined using Design Expert 13 software. The flavonoid test was performed using a UV-Vis spectrophotometer at 431 nm. The analysis of antioxidant activity was conducted using DPPH (2,2-Diphenyl-1-picrylhydrazyl). The highest flavonoid content obtained was 263.676 mgQE/g under the optimum operating conditions with a particle size of 100 mesh, a material-to-solvent ratio of 0.06, and an extraction time of 25 minutes.
Extraction of Polyphenols from Horn Banana Peel (Musa Paradisiaca var. Typica) Using the Ultrasound-Assisted Extraction Method Muhammad Yongki Ivan Sugesta; Revi Setia Wibowo; Masrurotul Alfiah; Achmad Sjaifullah; Muhammad Reza
JOBC Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Banana peel contains starch, protein, fat, total fiber, unsaturated fatty acids, pectin, amino acids, polyphenols, and micronutrients. Horn banana peel has 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.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

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.
Microwave-Assisted Hydrolysis of Robusta Coffee Parchment as a Reducing Sugar Feedstock Khairur Rahman Ilyas; M. Iqbal Samudra; Mizanurafi’ Ghifarhadi Prasiefa
JOBC Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The hydrolysis process is a process of breaking down substances by reacting using water, the aim is to break down the substance. This research focuses on the hydrolysis process to determine the reducing sugar content of coffee parchment. The method used is microwave-assisted hydrolysis. This method can increase lignin release more effectively than conventional methods in the process of cellulose and hemicellulose hydrolysis. The most commonly used hydrolysis to hydrolyze cellulose is acid hydrolysis. This research uses coffee parchment raw material (horn skin) which contains cellulose and hemicellulose with HCl solvent. Hydrolysis with acid concentration is (1, 2, and 3%), microwave power (150, 300, and 450 W), and time (20, 25, and 30 minutes). In this study, the optimal reducing sugar yield was 8,054 g/mL under the operating conditions of 25 minutes, 3% HCl concentration, and 450 W microwave power.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

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.
Optimization Transesterification Reaction in the Synthesis of Biodiesel from Household Catering Waste Cooking Oil Putri Eka Yulianda; Cherobina Bida Ayu Bestari
JOBC Vol. 4 No. 1 (2024): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

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 research aims 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.

Page 7 of 10 | Total Record : 92

 5   6   7   8   9 

Filter by Year

2020 2026


Reset
Filter By Issues
All Issue Vol. 6 No. 1 (2026): Journal of Biobased Chemicals Vol. 5 No. 2 (2025): Journal of Biobased Chemicals Vol. 5 No. 1 (2025): Journal of Biobased Chemicals Vol. 4 No. 2 (2024): Journal of Biobased Chemicals Vol. 4 No. 1 (2024): Journal of Biobased Chemicals Vol. 3 No. 2 (2023): Journal of Biobased Chemicals Vol. 3 No. 1 (2023): Journal of Biobased Chemicals Vol. 2 No. 2 (2022): Journal of Biobased Chemicals Vol. 2 No. 1 (2022): Journal of Biobased Chemicals Vol. 1 No. 1 (2020): Journal of Biobased Chemicals