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All Journal Jurnal Teknik Industri IPTEKMA Buletin Udayana Mengabdi JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Itepa : Jurnal Ilmu dan Teknologi Pangan Media Ilmiah Teknologi Pangan (Scientific Journal of Food Technology) agriTECH Jurnal Ilmiah Teknologi Pertanian Agrotechno CARADDE: Jurnal Pengabdian Kepada Masyarakat Agroindustrial Journal Journal of Fibers and Polymer Composites

Bambang Admadi Harsojuwono

Program Studi Teknologi Industri Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Author-ID : 2929405

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences

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KARAKTERISTIK PAPAN PARTIKEL KULIT BUAH KAKAO (Theobroma cacao L.) PADA VARIASI KONSENTRASI PEREKAT POLYVINYL ACETATE I Gusti Made Teddy Pradana; Bambang Admadi Harsojuwono; Amna Hartiati
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 6 No 1 (2018): Maret
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

The aims of this study were to know the characteristic of particle board cocoa-pod husk on variation of polyvinyl acetate (PVAc) adhesive concentration, and to have the best concentration polyvinyl acetate adhesive in particle board from cocoa-pod husk. The experiments in this study used a single factor with regression analysis. The factors are the concentration of polyvinyl acetate adhesive, that is 35%, 37.5%, 40%, 42.5%, 45% dan 47.5%. The fisis test results showed that concentration of polyvinyl acetate adhesive had upward trend on density and downward trend on moisture content, water absorption, and thickness swelling. The mechanical test result showed that concentration of polyvinyl acetate adhesive on concentration 47.5% had the best treatment. The best treatmest of particle board from cocoa-pod husk is made by used 47.5% polyvinyl acetate adhesive with density 0.48 g/cm3, moisture content 8,64%, water absorption 155.85%, thickness swelling 13.34% in fisis test and with MOE 44.07 kg/cm2, MOR 1.38 kg/cm2 and compressive strength parallel 2.36 kg/cm2 in mechanical test. Key words: particle board, cocoa-pod husk, polyvinyl acetate

PENGARUH KONSENTRASI PATI UBI TALAS (Colocasia esculenta) DAN JENIS PLASTICIZER TERHADAP KARAKTERISTIK BIOPLASTIK Farida Unggul Situmorang; Amna Hartiati; Bambang Admadi Harsojuwono
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 7 No 3 (2019): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This study aims to know the effect of the concetration of taro tuber starch and plasticizer type and their interactions on the characteristics of bioplastics, and to determine the concentration of taro tuber starch and plasticizer type which produces bioplastics with the best characteristics. The research used factorial randomized block design. The first factor is the concentration of taro tuber starch consisting of 3 levels 5, 6 and 7% (w/w). The second factor is the plasticizer type consisting of 3 levels that is glycerol, sorbytol and mixture plasticizer glycerol and sorbitol (1:1). Each treatment are grouped into two time-based of making bioplastics so there are 18 experimental units. Variabels observed tensile strength, elongation at break, Young’s modulus, swelling, biodegradation and FTIR. The data obtained were analyzed of variant and test Tukey’s. The result showed that the concentration of taro tuber starch and type of plasticizer had a very significant effect on tensile strength, elongation at break, Young’s Modulus and swelling but the type of plasticizer had no significant effect on biodegradation. Interaction between treatments has a very significant effect on Young’s Modulus and swelling, a significant effect on tensile strength and no significant effect on elongation at break and biodegradation. The concentration of starch 6% with plasticizer glycerol produces the best characteristics of bioplastics with tensile strength 2.270 0.057 MPa, elongation at break 14.5 0.01 %, Young’s modulus 15.683 1.155 MPa, swelling 29.88 1.02 % and biodegradability 6-7 days. FTIR analysis proved the existence of hydroxyl (O-H), carbonyl (C=O), C=C aromatic, carboxyl (C-O), C-H aromatic, and hydrocarbons –(CH2)n in the bioplastic. Keywords: Bioplastics, concentration of taro tuber starch, glycerol, sorbytol

Karakteristik Komposit Bioplastik pada Variasi Rasio Pati Ubi Talas Belitung (Xanthosoma sagittifolium) dan Karagenan Devi Hagelia Aritonang; Amna Hartiati; Bambang Admadi Harsojuwono
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 8 No 3 (2020): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This research was an effort to repair and strengthen the bioplastic pull using Ratio Variations Taro Tuber Starch (Xanthosoma sagittifolium) and Carrageenan. The purposes of the research was to know the effect of the ratio variations of taro tuber starch and carrageenan with glycerol and shakes the bioplastic composites of ratio variation which produces the best characteristics. This research uses factorial random block designs with ratio variations of taro tuber starch and carrageenan with a total 6 grams which consists of 6 levels were 5.5:0.5 ; 5:1 ; 4.5:1.5 ; 4:2 ; 3.5:2.5 and 3:3. The observed variables include mechanical test consisting of tensile strength, elongation at break, modulus young, swelling, biodegradation, and FTIR. The data were analyzed of variant and continued with the HSD Tukey. The result of the research showed that ratio variations of taro starch and carrageenan had significant to elongation at break, very significant effects on tensile strength and modulus young but ratio variations in taro starch and carrageenan non significant to sweeling and biodegradation. The best characteristic with moderate properties standart tensile strength (3.210±0.125) MPa, degradation with ASTM 5336 standart have time 6-7 days, elongation at break (20.7±0.038) %, modulus young (15.912±3.157) MPa, sweeling (43,695 ± 1,151) %, and contain hydrocarbon functional groups -(CH2)n, alkenes (CH), amines and amides (CN), alkohols, ethers, carboxylic acids and esters (CO), aldehydes, ketones, esters (C=O ), alkyne (C?C), monomer alkohol (OH), nitro compound (NO2), aromatic ring (C=C), hydrogen bonding carboxylic acid (OH). Keywords: Taro tuber starch, carrageenan, bioplastic composites, tensile strength

PENGARUH FORMULASI CARBOXYMETHYL CELLULOSE DAN ASAM STEARAT TERHADAP KARAKTERISTIK GEL BIOETANOL Ni Wayan Nadia Martaningsih Sutarsa; Bambang Admadi Harsojuwono; I Wayan Arnata
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 5 No 2 (2017): April
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (448.849 KB)

Bioethanol gel is a mixture of bioethanol and gel, so this product is one of the bioenergy products being developed today. This study was conducted to determine the effect of the formulations of carboxymethyl cellulose (CMC) and stearic acid to the characteristics of bioethanol gel. To achieve the objective of this study, the experiment that was designed using a randomized complete design was done on a laboratory scale by the treatments of the proportion of CMC and stearic acid in the formulation. The data obtained were analyzed by analysis of variance and if the treatment affected on the observed variables then continued with Duncan test. Effectivity test of the observed variables was used to obtain the best characteristics of bioethanol product. The test result showed that 1 g of CMC and 2 g of stearic acid produced the best characteristics of bioethanol gel with viscosity of 10 cp, combustion residues of 0.412%, 0.040% ash content, and duration of flaming was 150.5 seconds per 5 g sample. The bioethanol gel had a thermal efficiency value of 59.64% and a calorific value expressed in higher heating value and lower heating value was 3,163.283 cal/g and 2,562.697 cal/g, respectively. Key words: carboxymethyl cellulose , stearic acid, bioethanol gel, bioenergy

STRATEGI PENGEMBANGAN USAHA MINUMAN BARJAZ TEA DI BARJAZ COMPANY Ketut Anik Mas Juliani; Bambang Admadi Harsojuwono; Ketut Satriawan
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 5 No 4 (2017): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (476.278 KB)

This research aimed to analyze the internal and external conditions, to formulate strategies, and to determine the priorities of Barjaz Tea business development. Business development strategy is determined by using SWOT (Strength, Weakness, Oppurtunities, and Threats) matrix analysis, quantitative analysis using EFE, IFE and IE matrix, and also strategy priority analysis using TOPSIS (Technique for Order of Preference by Similarity to Ideal Solution) method. The research results show that there were 7 strengths, 6 weaknesses, 5 opportunities and 2 threats in this business. The value of the IFE (Internal Factor Evaluation) matrix analysis was 3.216 and the EFE (External Factor Evaluation) matrix was ??3.151. These values indicate a strong position, in the IE (Internal External) matrix strategies that should be to develop are consisting of intensive strategy (market penetration, market development and product development), and integrative strategy (backward integration, forward integration and integration horizontal). Based on SWOT analysis there were alternative strategies that can be recommended to develop Barjaz Tea business. TOPSIS analysis results with the value of the proximity of each alternative to the ideal solution was 1.000, namely maximize the availibility of raw materials. Keywords: business development strategy, Barjaz tea, SWOT, TOPSIS.

KARAKTERISTIK KOMPOSIT BIOPLASTIK GLUKOMANAN DAN MAIZENA DALAM PENGARUH VARIASI SUHU DAN WAKTU GELATINISASI Cintia Indrawati; Bambang Admadi Harsojuwono; Amna Hartiati
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 7 No 3 (2019): September
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

The aim of this study was to determine the effect of the temperature and time of gelatinization and its interactions on the composite characteristics of bioplastics glucomannan and cornstarch with to obtain gelatinization temperature and time to produce the best bioplastic glucomannan and cornstarch composites. This study used factorial randomized block design. Factor 1 gelatinization temperature consisting of 3 levels, namely 70 ± 1; 75 ± 1; 80 ± 1°C. Factor 2 is gelatinization time, for 2, 3 and 4 minutes. Variables observed included tensile strength, elongation at break, young modulus, swelling, biodegradation and functional group profile. The data were analyzed for diversity and continued with the BNJ test. The results showed that the temperature and time of gelatinization and their interactions had a very significant effect on tensile strength and elasticity. The temperature and time of gelatinization had a very significant effect but did not interact with elongation and did not significantly affect the swelling and biodegradation of bioplastic composites. The best bioplastic glucomannan and maizene composites were at a temperature treatment of 80 ± 1°C and 4 minutes gelatinization time with tensile strength characteristics (3.390 mpa); elasticity (35.811 mpa); elongation at break (12.3%); swelling (68.13%); degradation time of 8 days and contains hydroxyl (O–H) functional groups, alkene (C– H), carboxyl (C–O), carbonyl (C=O) and alkyne (C?C). Keywords : Composites bioplastic, glucomannan, maizena, temperature and time of gelatinization

HUBUNGAN WAKTU PENYEMPROTAN PESTISIDA SEBELUM PANEN TERHADAP RESIDU PROFENOFOS DAN KARAKTERISTIK MUTU SAWI PAKCOY (Brassica rapa L) I Made Prahadi Widnata Putra; Bambang Admadi Harsojuwono; I.G.A Lani Triani
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 6 No 2 (2018): April
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This research aims to 1) to know the correlation of different pesticide spraying time before harvest to the residual level of profenofos on the mustard pakcoy, 2) knowing the tendency of the relationship of different pesticide spraying time before harvest to the decrease of residual insecticidal content of profenofos and the quality characteristic of the mustard pakcoy. This research uses regression and correlation analysis, the factors used are the last spraying time 0 days, 2 days, 4 days, 6 days, 8 days, 10 days, before harvest. Each treatment was group in to 3 to obtain 18 experimental units. The parameters observed were the residual insecticide content of profenofos, pakcoy mustard characteristics and the relationship between the use of pesticide with the time interval of spraying on the residual content and the characteristics of the pakcoy. The results showed that the time of spraying before harvest was related to the residue of profenofos on the mustard pakcoy with treatment 0, 2, 4, 6, 8, 10 days before harvest 0.001860 mg / kg, 0.000615 mg / kg, 0.000511 mg / kg, 0.000394 mg / kg, 0.000279 mg / kg, and 0.000270 mg / kg. quality evaluation results with yellowish green to green color criteria, freshness of light and slightly damaged 1.6 to 3.75 (very damaged-undamaged). The result of correlation between the use of pesticide with the time of spraying on the residual insecticide content of profenofos and the characteristics of the quality of pakcoy mustard with the correlation coefficient value of 0.80 to the residual content, 0.96 to the color, 0.88 to freshness, and 0.97 to the damage value. Keywords: Brassica rapa L, time of pesticide spraying, profenofos and residue

Pengaruh Campuran dan Rasio Bahan Pembentuk Komposit terhadap Karakteristik Komposit Bioplastik Syah Banu Putra Sitepu; Bambang Admadi Harsojuwono; Amna Hartiati
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 9 No 2 (2021): Juni
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This research aims to determine the effect of the mixture and the ratio of the composites and their interactions to the characteristics of the bioplastic composites and to determine the mix and ratio of the composites that produce the best characteristics of the bioplastic composites. The experimental design of this study used a randomized block design method. Factor I is a mixture of composite materials consisting of maizena-glucomannan, maizena-chitosan, and maizena-carrageenan. The second factor is the ratio of the composite material mixture which consists of 5 levels, namely 100: 0, 75:25, 50:50, 25:75 and 0: 100. The experiment resulted in 15 treatment combinations and were grouped into 2 groups when the process of making bioplastic composites was obtained, so that 30 experimental units were obtained. Data were analyzed for their diversity and continued with Duncan's multiple comparison test. The observed variables which tensile strength, elongation at break, modulus young, swelling, and biodegradation time. The results showed that the mixture and the ratio of the composites forming a very significant effect on tensile strength, elongation at break, elasticity, and swelling. The interaction has a very significant effect on tensile strength, elasticity and swelling and significantly affects the elongation at break of bioplastic composites. Meanwhile, the mixture and the ratio of the ingredients to form the composites had no significant effect on the biodegradation time. Maizena:glucomannan composite with ratio (25:75) produced the best characteristics of bioplastic composites with tensile strength values of 6.99 MPa, elongation at break of 16.5%, elasticity 42.39 MPa, swelling 78.78% and biodegradable time of 7 days. There are 2 variables that have met the standard, namely: elongation at break of bioplastic composites that meet the plastic Standard SNI 7188.7: 2016 and biodegradation time has met the international plastic standard ASTM 5336 and 3 variables that do not meet the standards, namely: Tensile strength (6,99 MPa) and elasticity (42,39 MPa) do not meet the Plastic Standard SNI 7188.7: 2016 and swelling (39,1%) does not meet international plastic standards (EN 317). Keywords : bioplastic composites, maizena, glucomannan, chitosan, carrageenan

Karakteristik Komposit Bioplastik pada Variasi Perbandingan Campuran Pati Gadung (Dioscorea hispida Deenst.) dan Karagenan (Carrageenan) Fransiskus Yuven Wara; Amna Hartiati; Bambang Admadi Harsojuwono
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 8 No 4 (2020): Desember
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This study aims to determine the effect of the comparison of the mixture of yam starch (Dioscorea hypida D.) and carrageenan on the characteristics of bioplastic composites and on determining the comparison of the mixture of yam starch (Dioscorea hipida D.) and carrageenan (Carrageenan) which gives the best bioplastic composite characteristics. This study used a randomized block design (RBD) with a comparative treatment of the mixture of yam starch and carrageenan as follows (70: 30), (60: 40), (50: 50), (30: 70), (40: 60), Each treatment was grouped into 3 based on the time of making process so that 15 experimental units were obtained. The variables observed in this study were tensile strength, elongation at break, elasticity, swelling thickness and biodegradation time. The results showed that the comparison of the mixture of starch and carrageenan significantly affected the tensile strength, elongation at break, elasticity and did not significantly affect the development of thickness (swelling) and biodegradation time. A ratio of yam tubers starch with carrageenan on 50:50, produces the best yam tuber bioplastics, but does not meet the Indonesian national standard (SNI) with the characteristic tensile strength of 3.60 Mpa, elongation at break of 25.373 ± 0.830%, elasticity of 14.219 ± 0.866 Mpa, swelling of 28.3 ± 1.681%, biodegradation time of 6.667 ± 0.577 days. Keywords: yam starch, carrageenan, composites, bioplastics

Pengaruh Jenis dan Konsentrasi Bahan Pemlastis terhadap Bioplastik Glukomanan Aditya Nandika A.J; Bambang Admadi Harsojuwono; I Wayan Arnata
JURNAL REKAYASA DAN MANAJEMEN AGROINDUSTRI Vol 9 No 1 (2021): Maret
Publisher : Department of Agroindustrial Technology, Faculty of Agricultural Technology, Udayana University

This research aims to determine the effect of plasticizer types and concentrations on the characteristics of glucomannan bioplastics, and to determine the types and concentrations of plasticizers that can produce glucomannan bioplastics with the best characteristics. This experimental design used a completely randomized design method. Factor I is a type of plasticizer consisting of glycerol, sorbitol, propanol-2, and polyethylene glycol. The second factor is the concentration of plasticizers which consists of 4 levels, namely 0.5%: 1.5%: 2.5%: 3.5%. The experiment resulted in 16 treatment combinations and grouped into 2 groups to obtain 32 experimental units. The data were analyzed for their diversity and continued with the Duncan multiple comparison test. The results showed that the type and concentration of plasticizers had a very significant effect on tensile strength, elongation at break, modulus young, and swelling. The interaction has a very significant effect on tensile strength and expansion and has a significant effect on the elasticity of glucomannan bioplastics. Meanwhile, the type and concentration of plasticizers had no significant effect on the length of biodegradation. The best glucomannan bioplastic was obtained in the treatment of glycerol plasticizers with a concentration of 1.5 % with a tensile strength value of 6.17 MPa, elongation at break of 21.50 %, elasticity 28.72 MPa development 25.84 %, and degradation time of 8 days. Bioplastics produced in this study have meet the SNI 7188.7:2016 standards in the elongation test at break and standards ASTM 5336 in the degradation time variables. The resulting bioplastic has not met SNI on the tensile strength, modulus young, and swelling variables. Keywords : bioplastic, glucomannan, glycerol, polyethylene glycol, propanol-2, sorbitol

Co-Authors Aditya Nandika A.J Amna Hartiati Anak Agung Made Dewi Anggreni Anak Agung Made Dewi Anggreni Aryawan, I Komang Budi Mas Boy Darwin Situmorang Cintia Indrawati Devi Hagelia Aritonang Dewa Made Dwi Pradana Putra Dewi Sartika Esmeralda Oktaviani Simarmata Farida Unggul Situmorang Fransiskus Yuven Wara Gusti Ayu Kadek Diah Puspawati I Dewa Gde Mayun Permana I Gusti Ayu Lani Triani I Gusti Made Teddy Pradana I Gusti Ngurah Agung I Kadek Alit Susendiana Adi I Ketut Pramananta I Ketut Satriawan I Ketut Suter I Made Prahadi Widnata Putra I Made Sugitha I Nengah Kencana Putra I Pt Cahya Wisnawa P I W.G. SEDANA YOGA I Wayan Angga Sukma I Wayan Arnata Ida Bagus Wayan Gunam Ketut Anik Mas Juliani Liza Natasya Pongmassangka Luh Gede Arista Pradnyani M. Surya Pramana Mahardika M. SURYA PRAMANA MAHARDIKA, M. SURYA Mulyani Sri N.L. Yulianti Nairfana, Ihlana Natasya Damariandini Ni Kadek Ariani Dewi Ni Kadek Sriani Ni Ketut Wiradnyani Ni Luh Feby Putri Pratami Ni Made Wartini Ni Putu Suwariani Ni Wayan Nadia Martaningsih Sutarsa Noval Wahyu Adi NYOMAN SEMADI ANTARA Pande Made Kerta Indra Yoga Pupung Ferdiansyah Purba, Dillon Marichman Putu Devi Yustisia Utami Radja Zulfan Hasibuan Runa Ramadanty Aisyi Putri Sando F. Limbong Sayi Hatiningsih Shafira Salsabila Putri Sri Mulyani Sri Mulyani Syah Banu Putra Sitepu Tiara Noviyani Timothy Ich Sudanton Sitorus Viva Yani Tika Rutmana Simamora Vudia Miranda Wijaya Saputra Yohana Putri Lumbantoruan

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