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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 Sugar Concentration and Incubation Time on the Quality of Purple Sweet Potato Extract Probiotic Drink Desy Lyan Sari Simanjuntak; Sentosa Ginting; Terip Karo-Karo
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

This research was conducted to determine the effect of sweet sugar concentration and time of incubation on the quality of purple sweet potato probiotic juice. The research was perfomed in december 2012-January 2013 at the Laboratory of Food Technology, University of Sumatera Utara Medan, using completely randomized design with two factors, i.e, the concentration of glucose (G1): 2%, (G2): 3%, (G4): 4%, (G5): 5% and duration of incubation (I1): 4 hours, (I2): 8 hours, (I3): 12 hours, (I4): 16 hours. Parameters analyzed were total soluble solid (oBrix), pH, protein content (%), total microbial ( CFU / g), viscosity (dp.a), organoleptic values of color, flavor and taste. The results showed that the concentration of sugar gives had highly significant different effects on total soluble solid (oBrix), pH, protein content (%), total microbial (CFU / g), viscosity (cp), organoleptic values of color, falvor and taste and the effect of incubation time differed significant on total soluble solid ( oBrix), pH, protein content (%), total microbial (106 x CFU / g), viscosity (cp), organoleptic values of color, aroma and taste. The concentration of sugar of  2% and incubation time of 12 hours resulted in the taste  and more acceptable. . Key words : Purple Sweet Potato Juice, Sugar Concentration, Time of incubation
Study On The Addition Of Taro, Mung Bean, Wheat Flours On The Quality Of Cookies Wita Dola Rista Sidabutar; Rona Joharmi Nainggolan; Ridwansyah Ridwansyah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The research was aimed to investigate the effect of addition of taro and mung bean flours on the quality of cookies. The reseach had been performed using factorial completely randomized design, with one factor i.e : taro flour, mung bean flour and wheat flour (T): 70%:0%:30%, 60%:10%:30%, 50%:20%:30%, 40%:30%:30%, 30%:40%:30%, 20%:50%:30%, 10%:60%:30%, 0%:70%:30%. Parameters analyzed were water content, ash content, fat content, protein content, fiber content, cookies crispy test with instrometer and organoleptic values (flavor, taste and texture).The result showed that the ratio of taro flour, mung bean flour and wheat flour had significant effect on all parameters.The 70%:0%:30% composition produced the best cookies in organoleptic values. . Key words : Taro flour, mung bean flour, wheat flour,cookies
The Effect of The Addition of Natural Preservative Substance Concentration of Arenga pinnata Sap During Storage on the Quality of Liquid Palm Sugar Ricky Fauzi Lubis; Rona Joharmi Nainggolan; Mimi Nurminah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The research was conducted to determine the effect of the addition of natural preservative substance concentration of Arenga pinnata sap during storage on the quality of liquid palm sugar. The research had been performed using a completely randomized design with two factors, i.e. natural preservative substance concentration which is jackfruit stalk (N) : (2%), (4%), (6%), and (8%) and storage time (L) : (0, 1, 2, and 3 days). Parameters analyzed were pH, total acid, total sugars, total soluble solid (TSS) of Arenga pinnata sap, sensory characteristics (color and aromatic) of Arenga pinnata sap, TSS of liquid palm sugar, yield, sensory characteristics (color, aromatic, and flavor) of liquid palm sugar. The results showed that the natural preservative substance concentration had highly significant effect on all parameters. Storage time had highly significant effect on all parameters. Interaction of both factors had highly significant effect on TSS of Arenga pinnata sap, sensory characteristics color of Arenga pinnata sap, and TSS of liquid palm sugar, had significant effect on pH and total acid, and had no significant effect on total sugars, sensory characteristics aromatic of Arenga pinnata sap, yield, and sensory characteristics (color, aromatic, and flavor) of liquid palm sugar. Natural preservative substance concentration of 6% was the best treatment for the quality of liquid palm sugar. Key words : Arenga pinnata sap, natural preservative substance, liquid palm sugar, storage time
Rainfall Analysis in Kebun Rambutan oil palm plantation PT Perkebunan Nusantara III with water balance model Aldilla Pratiwi Tanjung; Sumono Sumono; Lukman Adlin Harahap
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Oil palm has been rumored as a plant which more water consumption, therefore a research is needed with water balance model to arrange and analyze rainfall parameters as a water source at Kebun Rambutan PT Perkebunan Nusantara III during March-July 2013. Water balance model consist of rainfall, throughfall, stemflow, interception, actual evaporation and runoff. The results showed that the soil at the site has Ultisol land order with sandy clay loam texture and bulk density of, 1,284 g/cm3, particle density of 2,663 g/cm3, porosity of 51,471% and soil organic matter of 2,275%. Daiy rainfall during the research was 3,456 mm/day, however based on yhe calculation of 10 years data from BMKG, daily rainfall during March-July was 4,269 mm/day. Actual evaporation was 2,929 mm/day and in field capacity was 358,05 mm, so that 143,837 mm more water as percolation. Keywords : rainfall, oil palm, water balance
Postharvest Technology of Information Systems in Deli Serdang Andre Gromico Napitupulu; Saipul Bahri Daulay; Ainun Rohanah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Postharvest Technology of information systems in Deli Serdang regency done manually, resulting in information storage and processing systems is ineffective and inefficient. In information management is still largely a result of human use role requires a relatively longer time. More than that, the information seekers-and decision-makers also have difficulty in obtaining the data they need. Therefore it is necessary for the further development of the information system. Web-based information system is considered to be a solution in order to access information faster, systematic and easy to use. For that designed a web-based information systems in the management of Postharvest Technology of information systems in Deli Serdang regency. Postharvest Technology information system is designed using PHP programming language, MySQL database and the method of system development lifecycle (SDLC). Keywords: agricultural machinery Deli Serdang, information systems, post-harvest technology, web
The determination of value of soybean and lemongrass plants factors using small plots and USLE methods on Andepts soil in Kwala Bekala Estate USU Dwi Ayu Febrina; Sumono Sumono; Lukman Adlin Harahap
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

One way to overcome erosion is using vegetative methods, where its influence can be manifested by the C factor. The best C factors used in determining the amount of erosion is the value of C in the local area. This study was aimed to determine the value of soya bean and lemongrass crop factor on the Andepts soil during March to July 2013 using the method of small plots and USLE. Parameters used in determining the C factor were the amount of erosion, the allowable erosion rate, and the erosion hazard level. The results showed that the amount of erosion on land without a crop was 0,46 ton (ha.year)-1, on lemongrass land was 0,39 ton (ha.year)-1, on soybeans land was 0,30 ton (ha.year)-1. The amount of allowable erosion rate was 32 ton (ha.year)-1. While erosion hazard rate on land without a crop was 0,014; on lemongras land was 0,012 and on soybeans land was 0,009 which include in low category. The value of soybeans crop factor using rainfall research data for 4 months and 10 years data was 0,655 and 0,666 respectively. The value of lemongrass crop factor using rainfall research data for 4 months and 10 years data was 0,851 and 0,866 respectively. Key words : andepts, C factor, erosion,, Kwala Bekala USU
Paper-Based Characteristics of Oil Palm Empty Fruit Bunch and Waste Paper Endah Andarini; Ainun Rohanah; Saipul Bahri Daulay
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Every year the need for paper continue to rise while the raw material from wood have been harder to find, therefore and the alternative of raw materials would be of plant fibers or fibrous waste such as empty fruit bunches of oil palm and paper waste. This research was aimed to study the characteristics of paper made ​​from empty fruit bunch pulp and paper waste pulp. Therefore, a research had been conducted in May-June 2013. The making of paper was done at Jl. Roso No. 8 Delitua and the testing of paper was done in PT PDM Indonesia Laboratory, Medan North Sumatera using factorial randomized block design with one factor i.e. waste paper composition (0%, 10%, 20%, 30%, 40% and 50%). Parameters observed were grammage, tensile and tearing strength. The results showed that the composition of the waste paper had highly significant effect on grammage and tensile strength. The resulting paper could be categorized as art paper with the best results obtained from the composition of 40% (120 g of oil palm empty fruit bunches and 80 g waste paper). Keywords: oil palm empty fruit bunches, waste paper, pulp composition, paper.
Design of Mechanical Coffee Pulper Equipment Johanes Mikael Simanulang; Achwil Putra Munir; Lukman Adlin Harahap
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

The constraint of capacity of semi mechanical coffee skin pulper is one of the obstacles to increase the coffee production. To overcome this, we need a motor-driven mechanical coffee skin pulper. The research was conducted with the study of literature and observations of semi mechanical coffee skin pulper. Then mechanical coffee skin pulper was designed. Effective capacity was 117.39 kg/h or 821.73 kg/day. This was greater than human driven semi mechanical coffee skin pulper. Basic costs to be spent in coffee pulping with this device was Rp. 85.159 /kg in the 1st year, Rp. 76.139 /kg in the 2nd year, Rp. 73.137 /kg in the 3th year, Rp. 71.638 /kg in the 4th year, and Rp. 70.741 /kg in the 5th year. This equipment will reach break-even point if it has been pulping coffee at 15104.499 kg/year. Net present value of these tools with 6% interest rate was Rp. 72,378,030.96 which means that the business was feasible to run. Internal rate of return on these instruments was 42.64%. Keywords : equipment design, mechanical pulper, coffee pulp
Design of Oil Palm frond Mechanically Cutlery Arsenius Ardinata Tarigan; Saipul Bahri Daulay; Achwil Putra Munir
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Palm frond cutting is still done manually, where the operator has limitations in cutting the frond. He must be really experienced and have high levels of accuracy and the work capacity is relatively limited. Therefore a mechanical cutting equipment was made. This study was conducted in May to September 2013 in the Laboratory of Agricultural Engineering, Faculty of Agriculture, University of North Sumatra, Medan, with a literature study, making and test the equipment and observation of parameters. The parameters measured were the equipment capacity, economic analysis, break-even point, the internal rate of return, and net present value. The results demonstrated that device capacity was 142.78 frond / h, economic analysis was Rp 55.873 / frond, break event was 71577.091 point / year, the internal rate of return was 40.2547 % and the equipment was deserved to be made. Keywords : agricultural equipment and machinery, cutter, oil palm frond.
Effect of Type of Commodity on the Capacity of Multifucer Roller Fadli Elsyah Pasaribu; Saipul Bahri Daulay; Ainun Rohanah
Jurnal Rekayasa Pangan dan Pertanian Vol 1, No 4 (2013): Jurnal Rekayasa Pangan dan Pertanian
Publisher : Universitas Sumatera Utara

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Abstract

Milling is done to powder food with a certain level of refinement to be more easily processed into other products. This study was conducted to test the capacity of the equipment using several commodities in multifucer grinder. Sorghum, soybeans, and rice were commodities to be tested to determine the effective capacity,the percentage of material not accommodated, and efficiency of the equipment. The results showed that the effective tool capacity was 19.48k/h for sorghum, 12.22k/h for soybean and 24.35 kg/h for rice. Percentage of material that was not accommodated was 7.33% for sorghum, 6.66% for soybean and 4,16% for rice. Appliance efficiency percentage was 92.66% for sorghum, 93.33% for soybean and 95.83% for rice. Keywords: Multifucer, Sorghum, Soybeans, Rice.

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