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JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI
Published by Universitas Udayana
ISSN : -     EISSN : 2503488X     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemistry Immunology & microbiology Industrial & Manufacturing Engineering
Journal of Agroindustrial Technology aims to publish original research results and policy papers written by researchers, experts as well as practitioners, in the field of agroindustries. Journal of Agroindustrial Technology encompasses a broad range of research topics in in the field of agroindustries covering process technology, industrial system engineering, and environmental management. Only the articles consist of novelty and excellent scientific contribution in agroindustrial technology fields can published in Journal of Agroindustrial Technology.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 101 Documents
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Karakteristik Mikroemulsi Ekstrak Bunga Kamboja Kuning (Plumeria alba) Pada Ukuran Partikel dan Waktu Ekstraksi Wiradharma, I Gede Yudha; Suhendra, Lutfi; Wrasiati, Luh Putu
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p11

Abstract

The yellow frangipani flower (Plumeria alba) possesses numerous important chemicals that can be utilized in the formulation of cosmetic and fragrance goods by PEG 400 extract microemulsion. In the extraction of yellow frangipani blossoms, PEG 400 serves as a polar solvent with a low molecular weight, non-adhesive properties, and a dielectric constant of 13.6. The study aimed to ascertain the influence of particle size and extraction duration on the microemulsion properties of yellow frangipani flower extract, as well as to identify the optimal conditions for achieving superior microemulsion characteristics of the extract. This research employed a Randomized Group Design featuring two variables. The initial factor is particle size, categorized into three levels: 40 mesh, 60 mesh, and 80 mesh. The second component is extraction duration, comprising three levels: 2 hours, 4 hours, and 6 hours. Data were subjected to ANOVA analysis, subsequently followed by Tukey's test. The findings indicated that the interplay between particle size and extraction duration markedly influenced microemulsion stability following 24 hours of incubation and subsequent centrifugation stability. The ideal treatment comprised a microemulsion of yellow frangipani flower extract at a particle size of 80 mesh, extracted over a duration of 6 hours, exhibiting a clear appearance. The turbidity index was measured at 1.378% after 24 hours of incubation, with a centrifugation stability of 1.522%, a particle size of 9.476 nm, and a stable microemulsion.
Karakteristik Komposit Biotermoplastik Dari Pati Termoplastik/Glukomanan Termoplastik/Poliasam Laktat Dalam Variasi Jenis dan Konsentrasi Compatibilizer Saragih, Ruth Natasya Octaviani; Harsojuwono, Bambang Admadi; Suhendra, Lutfi; Amna , Amna; Suhartini, Sri
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p12

Abstract

Biotermoplastic is a one of the innovation to improve the physical and mechanical properties of bioplastics. This study aims to determine the effect of the type and concentration of compatibilizer on the characteristics of biothermoplastic composites and to determine the type and concentration of the right compatibilizer to produce the best characteristics of biothermoplastic composites of thermoplastic starch/thermoplastic glucomannan/polylactic acid (TPS/TPG/PLA). This research utilizes a Completely Randomized Design (CRD) with 6 treatments, namely J1KI (maleic acid anhydride 5%), J1K2 (maleic acid anhydride 7,5%), J1K2 (maleic acid anhydride 10%), J2K1 (stearic acid 5%), J2K2 (stearic acid 7,5%), and J2K3 (stearic acid 10%), with 3 replications. The variables observed in this study were tensile strength, elongation at break, elasticity, swelling, density, melting point and biodegradation time. The data were analyzed by analysis of variance (ANOVA) and further tested using the Honestly Significant Difference (HSD) test. The results showed that the type and concentration of compatibilizer had a very significant effect on the values ​​of tensile strength, elongation at break, elasticity, swelling, density, melting point and biodegradation time. The best characteristics of biothermoplastic composites of thermoplastic starch/thermoplastic glucomannan/polylactic acid were obtained by using 10% anhydrous maleic acid compatibilizer with a tensile strength value of 30.43 MPa, an elongation at break of 0.90%, elasticity of 3.38 GPa, swelling of 0.51%, density of 1.52 g/cm3, melting point of 149.77oC and biodegradation time of 17.667 days.
Karakteristik Mutu Pakan Ikan Gurami (Osphronemus goramy) Pada Perbandingan Variasi Limbah Organik Manurung, Ridho Al-Falah; Sadyasmara , Cokorda Anom Bayu; Triani, I Gusti Ayu Lani
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p13

Abstract

Fish feed is an important aspect of fish farming and a source of energy to support growth in fish. As commercial feed is still relatively expensive for farmers, organic waste can be an environmentally friendly, valuable alternative as fish feed. The organic waste used in this study concist of fish bone meal, coconut pulp, and rice bran. This study aims to determine the effect of organik waste variations on the quality characteristics of gourami fish feed and to identify the best variation according to SNI 7473-2009 and approaching characteristic of the control feed. This study used a Randomized Group Design (RBD) with 1 factor, which is the variation in the ratio of organic waste with 5 levels: fish bone meal (TI) 50% coconut pulp (AK) 15% rice bran (B) 35%, TI 60% AK 10% B 30%, TI 70% AK 5% B 25%, TI 80% AK 5% B 15%, and commercial feed (Control). he observed variables include protein content, fat, moisture, ash, crude fiber, carbohydrates, and feed diameter. The results showed that variations in the ratio of organic waste had a significant effect on the protein, fat, moisture, ash, crude fiber, carbohydrate and feed diameter, with the tested met the requierements of SNI 7473 (2009). The best treatment that produced variations that match the characteristics of SNI 7473 (2009) and close to the control was TI 80% AK 5% B 15% with characteristic values of protein content 21.29%, fat 10.61%, water 8.67%, ash 12.82%, crude fibre 22.3%, carbohydrate 46.60%, and feed diameter 5.20 mm.
Karakteristik Krim Body Scrub Pada Variasi Perbandingan Bubuk Kulit Kopi Robusta dan Ekstrak Kulit Jeruk Nipis Serta Waktu Pengadukan Tambak, Yosafat Anesta Tarigan; Putra, Gusti Putu Ganda; Wrasiati, Luh Putu
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p14

Abstract

Body scrub cream is one of the cream dosage forms. Raw materials and stirring time in the cream making process affect its characteristics. The purpose of this study was to understand the effect of the ratio of robusta coffee skin powder and lime peel extract and stirring time in making body scrub cream and determine the best treatment in producing body scrub cream. The implemented design is Factorial Randomized Block Design (RBD), first factor of the comparison between robusta coffee skin powder: lime peel extract 1: 2, 1: 1, and 2: The second factor is stirring time of 15, 20, and 25 minutes. The variables observed were moisture content, pH, viscosity, spreadability, separation ratio, antioxidant activity, and organolopetic assessment. The results showed that the material ratio treatment had a very significant effect on water content, viscosity, spreadability, antioxidant activity, aroma, color, and texture. Stirring time treatment had a very significant effect on viscosity, spreadability, and antioxidant activity of body scrub cream. The interaction between treatments had a very significant effect on antioxidant activity. The treatment of the ratio of ingredients, stirring time, interaction between treatments had no effect on pH. The conclusion in this study is the treatment of the ratio of robusta coffee skin and lime peel extract 1: 2 and stirring time of 15 minutes is the best treatment in making body scrub cream, with characteristics of water content value 38.03%, pH 5, viscosity 30,000 cp, spreadability 5.49 cm, separation ratio =1, antioxidant activity (IC50) 243,688.65 ± 309.50 mg/L, aroma 5.30 (somewhat like - like), color 4.05 (normal - somewhat dislike), and texture 4.90 (normal - somewhat like).
Karakteristik Komposit Biotermoplastik Dalam Variasi Formulasi Pati Termoplastis, Glukomanan Termoplastis dan Poli Asam Lakta Harianja, Berkat; Harsojuwono, Bambang Admadi; Triani, I Gusti Ayu Lani; Hartiati, Amna; Suhartini, Sri
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i03.p15

Abstract

Determination of biothermoplastic composite formulation is essential to produce the best biothermoplastic composite characteristics and meet the standards. This study seeks to identify the characteristics of the best biothermoplastic composites in variations of thermoplastic starch formulations, thermoplastic glucomannan and polylactic acid. This study used a Completely Randomized Design (CRD) with 5 treatments of TPS/TPG formulas with PLA, namely 90:10, 80:20, 70:30, 60:40, 50:50. There were 4 repetitions of each treatment, for a total of 20 experimental units. The variables observed were tensile strength, elasticity, elongation at break, melting point, biodegradation, swelling and density. The diversity analysis showed that the formulation of thermoplastic starch-thermoplastic glucomannan and polylactic acid had a very significant effect on the tensile strength, elasticity, elongation at break, melting point, biodegradation, swelling and density of biothermoplastic composites. Biothermoplastic composites with the formulation of TPS/TPG: PLA = 50:50 produced the best characteristics with a tensile strength of 26.71 MPa, elasticity of 932.04 MPa, elongation at break of 2.89%, biodegradation of 15.25 days, melting point of 152.65oC, density of 1.26 g/cm3 and swelling of 1.32%.
Vol 12 No 3 September 2024 JRMA, Admin
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 3 (2024): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

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

Abstract

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Karakteritik Ekstrak Kulit Buah Kakao Sebagai Pewarna Alami Pada Variasi Jenis Pelarut dan Daya Ekstraksi Dengan Metode Microwave Assisted Extraction Agustina, Dwy Ristika Sari; Putra, Gusti Putu Ganda; Hartiati, Amna
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 4 (2024): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i04.p01

Abstract

Cocoa pods contain flavonoid compounds that can be used as natural colourants. These compounds can be obtained through an extraction process, one of which uses the Microwave Assisted Extraction method. This study was conducted to determine the effect of solvent type and power on extraction using the Microwave Assisted Extraction method on the characteristics of cocoa fruit skin extract and to determine the best combination of solvent type and power to produce cocoa fruit skin extract as a natural colourant. The experimental design used was factorial randomized block design with 2 factors grouped based on the time of implementation. The first factor is the type of solvent consisting of 3 type, namely ethanol, methanol, and acetone. The second factor is extraction power consisting of 3 levels, namely 300, 450, and 600 watts. The data were analyzed by analysis of variance and continued with Tukey test. The results showed that the type of solvent and extraction power and their interaction had a very significant effect on yield, total flavonoids, L*a*b* color intensity, but the treatment of solvent type and power and their interaction did not significantly affect the colour scoring and liking of cocoa pod skin extract. From the effectiveness index test, the best treatment to obtain cocoa pod skin extract as a natural dye was ethanol solvent and 600 watts power, with characteristics of yield 4.56 ± 0.27%, total flavonoids 9.48 ± 0.30 mg QE/g, L* 37.55 ± 1.34, a* 26.55 ± 0.92, b* 58.6 ± 1.70, colour scoring 4.55 ± 0.60 (less bright brown - not bright brown), and liking 4.25 ± 0.64 (neutral - somewhat like).
Analisis Kualitas Sabun Cair Dengan Bahan Pengikat Dari Filter Puntung Rokok Purba, Ira Sylvia; Arnata, I Wayan; Antara, Nyoman Semadi
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 4 (2024): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i04.p02

Abstract

Waste is an issue of considerable concern in Indonesia. One form of hazardous waste that is difficult to degrade by the environment is cigarette butt filters. Therefore, there is a need for further handling to provide added value to cigarette butt filters by utilizing them as a binder in soap making. This study aims to analyze the quality of soap with binders from cigarette butt filters and determine the weight of liquid soap and soaking time that produces the best soap. This study used two factors: liquid soap weight (35, 40, and 45 g) and soaking time (10, 20, and 30 minutes). The results showed that soaking time and its interaction had a significant effect on foam stability, while the weight of liquid soap did not show a significant effect. In addition, the weight of liquid soap significantly effected moisture content and density, but not pH and antibacterial ability. The effectiveness index shows that the best treatment to produce soap is the ratio of liquid soap weight of 45 g and soaking time of 10 minutes. The overall acceptance test (hedonic) showed that panelists preferred the soap with the ratio W2B2 (40 g liquid soap, 20 minutes soaking), which had a value of 51 ± 133.
Karakteristik Mikroemulsi Minyak Atsiri Kulit Buah Lemon (Citrus limon) Pada Penambahan Kosurfaktan dan Rasio Surfaktan-Kosurfaktan Dengan Minyak Atsirinya Pradnyani, Putu Dhea; Suhendra, Lutfi; Antara, Nyoman Semadi
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 4 (2024): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i04.p03

Abstract

Essential oil from lemon peel (Citrus limon) has a distinctive aroma that can be used as a body mist. Body mist is a type of perfume with an essential oil content of 3-5%. Lemon peel essential oil microemulsion is a water-based body mist product. Lemon essential oil microemulsion is formed from a mixture of surfactants (Tween 20, Tween 80 and Span 80), co-surfactant, Polyethylene Glycol (PEG) 400, lemon essential oil and water. The first stage of the research was the formation of fruit peel essential oil microemulsions by treating the mixture ratio of surfactant and co-surfactant. The second stage of the research was the formation of fruit peel essential oil microemulsions by treating the ratio of a mixture of surfactant-cosurfactant and lemon peel essential oil. The results of the first stage showed that the microemulsion of lemon peel essential oil with a mixture ratio of surfactant and PEG 400 (50:50) had a turbidity index value of 0.092%, transmittance of 91.6%, was non-sticky, transparent and stable against centrifugation. The results of the first stage are used in the second stage, namely the mixture ratio of surfactant and Polyethylene Glycol (PEG) 400 (50:50). The results of the second stage, namely the ratio of the mixture of surfactant-PEG 400 and lemon peel essential oil (80:20), showed that the concentration of lemon peel essential oil was the highest which still formed a microemulsion of lemon peel essential oil. This lemon peel essential oil microemulsion has a turbidity index value of 0.089%, transmittance of 91.23%, transparent appearance, stable to centrifugation, stable to pH (4.5; 5.5; 6.5), stable to dilution (1: 9; 1:49; 1:99), stable during 4 weeks of storage, has an average particle size of 32.2 nm and a polydispersion index (PI) value below 0.5.
Aktivitas Antibakteri Escherichia coli Pada Berbagai Konsentrasi Lignin Dari Serat Serabut Kelapa (Cocos nucifera L) Wahyudiyono, Aditya Ivan; Anggreni, Anak Agung Made Dewi; Arnata, I Wayan
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 12 No 4 (2024): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JRMA.2024.v12.i04.p04

Abstract

Lignin as one of the phenolic compounds can be used as an antibacterial substance that has renewable properties, is easily decomposed by the environment, and its availability is abundant in nature. The purpose of this study is to determine the effect of lignin concentration from coconut fiber on the antibacterial activity of Escherichia coli and determine the concentration of lignin from coconut fiber that produces the highest antibacterial activity of Escherichia coli. This study used a completely randomized design (CRD) with lignin concentration treatment (K) consisting of 6 levels, namely antibiotics, 0 percent, 5 percent, 10 percent, 15 percent, and 20 percent. The variable observed was the diameter of the inhibition zone against E. coli bacteria. The results of the analysis of variance showed that the concentration of lignin had a very significant effect on the diameter of the inhibition zone of E. coli bacteria. Lignin concentration of 20 percent produced the highest inhibition zone diameter of 7,11 mm.

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