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INDONESIA
Jurnal Rekayasa Pangan dan Pertanian
Published by Universitas Sumatera Utara
ISSN : 2303386X     EISSN : -     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Rekayasa Pangan dan Pertanian merupakan media untuk publikasi tulisan asli berkaitan dengan teknologi pangan dan keteknikan pertanian secara luas, yang diterbitkan atas kerjasama antara Program Studi Ilmu dan Teknologi Pangan dan Program Studi Keteknikan Pertanian Fakultas Pertanian USU.
Arjuna Subject : -
Articles 593 Documents
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The Effect of Ca(OH)2 Concentration and Drying Time on Yam Bean Dried Candied Quality Maria Goretty Manik; Linda Masniary Lubis; Sentosa Ginting
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The aim of this research was to determine the effect of Ca(OH)2 concentration and drying time yam bean dried candied quality. This research was conducted in August until September 2015 in Food Chemical Analysis Laboratory, Agriculture Faculty, North Sumatera, Medan. This research was using factorial Completely Randomized Design with two factors, i. e: Ca(OH)2 concentration (S) : (0; 0,2%; 0,4%; 0,6%; 0,8%) and drying time combination (P) (8 hours; 10 hours; 12 hours). The analyzed parameters were moisture content, vitamin C content, total soluble solid, crude fiber content, ash content, score valueof colour, texture and hedonic value of colour, taste  and texture. The results showed that Ca(OH)2 concentration had highly significant effect on vitamin C content, score test of color,  texture, and hedonic test of texture, and had no effect to moisture content  and hedonic test of taste.The drying time combination had highly significant effect on moisture content, vitamin C content, total soluble solid, crude fiber content, ash content, score value of colour and texture, and had no effect on hedonic value of colour and texture. The interaction of the two factors had highly significant effect on score value of colour, texture and hedonic value of texture. Ca(OH)2 concentration of 0,4% and drying time of 12 hours were the best treatment and acceptable. The best dried candied bengkuang had a low antioxidant activity with the of IC50 value of 101-150 bpj. Keywords : Ca(OH)2 concentration, dried candied, drying time, yam bean.
The Effect of Corn Starch Edible Coating and Immersion Time on Quality of Minimally Processed Pineapple Nia Nazrah Hasibuan; Ismed Suhaidi; Ridwansyah Ridwansyah
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The objective of this research was to find out the effect of corn starch edible coating and immersion time on quality of minimally processed pineapple. Method used in this research was completely randomized design (CRD) with 2 factors, i.e; the concentration of starch (P) : (1%, 2%, 3%, and 4%) and immersion time (L) : (1 minute, 2 minutes, 3 minutes, and 4 minutes). Parameters analyzed were total soluble solid, total acid, vitamin C content, moisture content, fiber content, brightness level, organoleptic values of flavor and taste, texture score, and color score.          The results showed that the starch concentration had highly significant effect on total soluble solid, total acid, vitamin C content, and texture score. Immersion time had highly significant effect on total soluble solid, total acid, vitamin C content, organoleptic values of flavor and taste, texture score and color score. The interaction of starch concentration and immersion time had significant effect on total soluble solid. The starch concentration of 1% and immersion time of 1 minute gave the best quality of minimally processed pineapple.
The Effect of Sweet Potato Starch Concentration as Edible Coating on Quality of Minimally Processed Snake Fruit During Storage Rizki Annisa; Ismed Suhaidi; Lasma Nora Limbong
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The objective of this research was to find out the effect of starch concentration and storage time on quality of minimally processed snake fruit coated with edible coating. Method used in this research was completely randomized design (CRD) with 2 factors, namely the concentration of starch (P) : (2%, 3%, 4%, 5%, and 6%) and  storage time (L) : (2 days, 4 days, and 6 days). Parameters analyzed were weight loss, total acid, vitamin C content, total soluble solid, tanin content, total microorganism, organoleptic values of color, taste, flavor, and texture score. The results showed that the starch concentration  had highly significant effect on weight loss, total acid, vitamine C content, and total soluble solid. Storage time had highly significant effect on weight loss, total acid, vitamine C content, total soluble solid, tanin content, total microorganism, organoleptic values of color, taste, flavor and texture score. The interaction of two factors had highly significant effect on weight loss and total soluble solid and had significant effect on total acid and vitamine C content. The starch concentration of 5% with storage time 4 days could better protect the quality of minimally processed snake fruit. Keywords : edible coating, snake fruit, storage time, sweet potato starch
RPM Test of Mechanical Desiccated Coconut Agra Izwan; Saipul Bahri Daulay; Sumono Sumono
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

This research was done to test the effect of rpm on the effective capacity of the equipment, percentage of material left in the equipment, and yield. This research was using non factorial completely randomized design. It was found that the work capacity of the equipment, percentage of material left in the equipment, and yield on 1125 rpm are 83,128, 12,17%, and 87,83% kg/hr respectively. On 900 rpm are 75.650, 19,33%, and 80,33% kg/hr respectively. On 750 rpm are 70,484, 25%, and 75% kg/hr respectively. The results showed  that number of knife edge had significant effect on percentage of material left in the equipment, and yield and had significant different on the work capacity. The main cost from year one to year seven were Rp. 143,52, Rp. 134,90, Rp. 132,04, Rp. 130,61, Rp. 129,76, Rp. 129,31, and Rp. 128,78 per kg respectively. Break even point from year one to year seven were 1552,55, 835,26, 596,50, 477,32, 405,96, 368,42, 324,75 kg respectively. The result of net present value from 6% of bank rate was Rp. 1.518.446.869,44 which means this business was competent. The internal rate of return was 35,6% which means this business was competent if the bank rate were not more than 35,6%. Keywords : rpm, grater, desiccated coconut
Design of Mechanical Union Peeler Equipment Arif Rizki Tanjung; Achwil Putra Munir; Sulastri Panggabean
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The production process that includes pre-harvest until postharvest requires the support of various effective facilities and infrastructure, development equipments and agricultural machinery is among the way of increasing agricultural production. To support this we need a mechanical onion peeler driven by electricity. The study was conducted by literature study and observation on the onion peeler, and then to design the coupling components of the  mechanical onion peeler. The effective capacity of the tool was 14.15 kg / hr. The value of the effective capacity of the tool is larger than the onion peeler driven by human power. Basic costs to be incurred in peeling onions with this tool was Rp. 751,904/kg in the 1st year, Rp.647,531/kg in the 2nd year, Rp. 624,771/kg in the 3rd year, Rp. 613,441/kg in the 4th year, and Rp. 606,609/kg in the 5th year. This tool will reach the break even point when the value has peeling corn amounted to 8624,85 kg/year. Net present value of these tools with an interest rate of 6% Rp. 14.553.501,5 whichmeant that the business was feasible to run. The internalrate of return was 40,93%.   Keywords: design equpments, mechanical peeler, onion.
Test Results Of Temperature Variation On Hair Dryer Fishing Equipment (Cabinet Type) Erdi K.L. Tobing; Ainun Rohanah; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Drying is an important activity in pickling food presentation, as well as in agriculture product industry. The easiest and cheapest way to do drying is with sun light or sundrying. To overcome the sunlight limitation, a sunlight fish drying was had to guarantee the fish higenity. This research was aimed to test moisture content of pora-pora fish using fish dryer machine (cabinet type) and calculated the organoleptic value of the result.  This research had been conducted at agriculture engineering laboratory, faculty of agriculture USU in December 2014 until March 2015 using pora-pora fish. Parameters observed were moisture content and organoleptic test. The result of this research showed that the best moisture content was 29,17%, the best appearance 7,13 and the smell was 7,0. Keywords: Dryer fish machine (cabinet type), pora-pora fish
Test the Number of Stirring Bar in Grated Coconut Dryers Friani Parsaulian; Lukman Adlin Harahap; Achwil Putra Munir
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Coconut plant is a plant of life, because all its parts can be utilized to meet human needs. One of the utilization is grated coconut that can to be used in making bread, biscuits, sweets, its milk and coconut flour. This study was aimed to examine the effect of the number of rod in manufacturing of desiccated coconut on the performance of the grated coconut dryer. This research was conducted in March and May 2015 in the Laboratory of Agricultural Engineering, Faculty of Agriculture, University of North Sumatra, Medan, by literature study, testing equipment and parameters observation. Parameters measured were moisture content, percentage of materials left in the appliance, yield and organoleptic tests. The results showed that the number of rod was not significantly affected the water content, yield and organoleptic tests and significantly affected to the percentage of material left in the appliance. Key words: desiccated coconut, grated coconut dryer, stirring bar.
Testing Of Variation Tray’s Hole Diameter Of Cassava Dryer Cabinet Type To Quality Drying Results Geri Frandianto Lumbantobing; Ainun Rohanah; Sulastri Panggabean
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The dependence of people consume rice is not followed by the increase of rice production. Therefore on, alternative foodstuffs is needed such as cassava which can be processed into gaplek, and cassava flour. This research was done in Agriculture Engineering Laboratory Faculty of Agriculture, and Food Science and Technology Laboratory Faculty of Agriculture in Oktober 2014 until March 2015 using non factorial completely design with tray holes diameter of (D1) 3 mm, (D2) 5 mm, and (D3) 7 mm. The parameters analysed were processing capacity, moisture content, yield, and brightness level. The results, showed that, the best drying cassava is produced by (D2) 5 mm. Keywords : Cassava, Dryer, Tray holes
Performance and Operating Costs Oil Palm Fronds Chopper Machine Designed by Agricultural Mechanization Unit of North Sumatra Province Handyman M. Waruwu; Lukman Adlin Harahap; Achwil Putra Munir
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Chopping is one way of size reduction of solids into smaller pieces to produce solids of a certain size. Chopping with a mechanical equipment has not much been done due to lack of knowledge and limitation of existing equipment of the farmers. In fact, if it can be done can increase farmers' income. The aim of the research was to test the performance of oil palm fronds chopper machine designed by Agricultural Mechanization Unit in North Sumatra Province using oil palm fronds as a raw material and analyze its operating costs. Observed parameters were effective capacity, yield of chopping, the percentage of materials left behind, and fuel consumption of the equipment. The results showed that the effective capacity of the equipment was 287,29Kg/hour. Chopping yield was 94,2%. The percentage of materials left behind was 5,2%. Fuel consumption was 0,44 L/hour. Cost of Analysis was Rp. 53,9/Kg for the first year, Rp. 54,29/Kg for the second year, Rp. 54,48/Kg for the third year, Rp.54,79/Kg for the fourth year, and Rp. 55,12/Kg for the fifth year. BEP was 62.209 Kg in the first year, 65.862 Kg in the second year, 67.759 Kg in the third year, 70.755 Kg in the fourth year and 73.947 Kg in the fifth year. The IRR was 39,17%. Key words: chopper machine, oil palm fronds, operating costs, performance
Design of Mechanical Corn Sheller Equipment Hayado Tambunan; Achwil Putra Munir; Sumono Sumono
Jurnal Rekayasa Pangan dan Pertanian Vol 4, No 2 (2016): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The use of corn sheller is one of post-harvest handling to increase maize production. To support this, we need a corn sheller driven by electricity. The study was conducted with literature study and observationon corn sheller. Then design the coupling components of the equipment corn sheller. Effective capacity was115,632  kg / h. The value of the effective capacity of the equipment was larger than corn sheller driven by human power. Basic cost to be incurred in releasing corn with this tool was Rp. 78,855/kg in the 1st year, Rp. 73,474/kg in the 2nd year, Rp. 71,683/kg in the 3rd year, Rp. 70,789/kg in the 4th year, and  Rp. 70,254/kg in the 5th year. This equipment will reach break even point if it has been releasing cornat 5.645,97 kg/year. Net present value of the equipment with 6% interest rate was Rp. 127.291.705,59 which meant that the business was feasible to run. The internal rate of return was 45,02 %. Keyword : corn, equipment design, sheller

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