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agriTECH

agritech
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Published by Universitas Gadjah Mada

ISSN : 02160455 EISSN : 25273825 DOI : 10.22146/agritech

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 10 Documents

Search results for , issue "Vol 39, No 3 (2019)" : 10 Documents clear

Status Hematologi, Kadar IgG dan IgA Tikus yang Mengonsumsi berbagai Variasi Jumlah Tempe Kedelai Hitam Nurrahman Nurrahman; Mariyam Mariyam
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Consumption of black soybean tempe can provide rapid improvement in children with poor nutritional status and/or suffering from diarrhea. The antioxidant activity of black soybean tempe is higher than yellow soybean tempe. This study aimed to examine the effect of the amount of black soybean tempe in the feed on hematological status, IgG levels, and IgA levels of rat blood. There was a total of 6 groups, each containing 5 rats. The rats were kept in animal laboratories at room temperature (25–27°C) for 25 days. The six groups were induced Enteropathogenic Escherichia coli (EPEC) suspension with a concentration of 107 CFU / mL of 1 mL per day for seven days, orally using a feeding tube. Parameters analyzed included hematology status, IgG levels and IgA levels. The administration of black soybean tempe had an effect on increasing hemoglobin levels, the number of erythrocytes and the percentage of hematocrit, and it gave the effect of decreasing the number of leukocytes and platelets of rat blood induced with EPEC bacteria. The group of rats that consumed black soybean tempe had no influence on IgG and IgA levels of blood plasma.

Hydrogen and Methane Production Under Conditions of Anaerobic Digestion of Key-Lime and Cabbage Wastes Gaweł Sołowski; Izabela Konkol; Bartosz Hrycak; Dariusz Czylkowski
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

In this article, the results of key lime fruit (Citrus aurantifolia) wastes and cabbage (Brassica L.) wastes anaerobic digestion are presented. Anaerobic digestion of the wastes was performed in batch process, neutral pH (key-lime 7.47 and cabbage 7.67) and substrate concentration of Volatile Suspended Solids (VSS) 10 gVSS/L. One of the aims of this research was to check the availability of these substrates to be the source of methane and hydrogen. Key lime wastes produced 32 times more methane than raw cabbage. However, hydrogen production from cabbage was 149 times higher than key lime. The percentage of methane production in cabbage was up to 81% and in key lime was up to 75%. This research showed from the substrates comparison that efficient hydrogen production is less dependent on low pKa, pH than on total solids of the substrates.

Prediksi Laju Sedimentasi dan Erosi di Sub DAS Kemuning Menggunakan Rainfall Simulator Idah Andriyani; Sri Wahyuningsih; Muhamad Derajat Karim
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Sedimentation is the accumulation of sediment materials in a location due to both surface erosion and cliff erosion that occurred in the water catchment area, and which was carried by the flow of water to that location. The purpose of this study was to determine the sedimentation rate by using slope data and rainfall intensity in the river basin area. The sample used in this study was the land located in the Kemuning watershed, in which the Kemuning watershed is a sub-watershed of the Bedadung watershed located upstream. Soil samples were taken from 3 different points, upstream, middle and downstream, then the soil was taken to the laboratory to be tested for the soil’s physical properties and the rate of soil loss using a rainfall simulator tool. The research results of soil erodibility in the upstream, middle area and downstream were 0.74 (very high); 0.59 (high); and 0.7 (very high) respectively. Moreover, the calibration of slope in the field to the rainfall simulator was 15°. We found that rainfall intensity which give the highest sedimentation in the upstream, middle and downstream area were 142.15 mm/h; 132.05 mm/h; and 137.43 mm/h respectively, with rainfall durations of 13.88 minutes; 15.50 minutes; and 14.60 minutes. Finally, the sedimentation measurement results using a rainfall simulator in the upstream, middle and downstream were 39904.04 mg/L; middle 85401.85 mg/L; and downstream 75530.00 mg/L respectively. We conclude that rainfall duration gives more influence to the sedimentation.

Optimasi Gasifikasi Serbuk Tandan Kosong Kelapa Sawit Menggunakan Powder Gasifier Type Cyclone Riksa Prayogi Widyaprawira; Radi Radi; Bambang Purwantana
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Every year, palm-oil production is increasing. Each ton of fresh fruit bunches produced to 22%–23% of oil palm empty fruit bunches (OPEFB). Based on the laboratory test, OPEFB contains 69,72% volatile and 3353,97 kcal/kg of calor. Aim of the research is to determine size material OPEFB in gasification process, determine combination AFR (Air Fuel Ratio) in gasifier tipe cyclone so that produce optimal energy and to prediction gasification process with CFD method (Computational Fluid Dynamic). The powder gasifier cyclone type method is used to convert this into renewable energy. The research method consists of OPEFB powder material with 14, 30 and 50 mesh treatment, 4 air-fuel ratio, and material mass rate treatments, and variations of the length of middle-pipe treatment. The weight of each sample is 500 g, added with 100 g of charcoal and repeated 3 times. The result shows the mesh A3 has the highest temperature at 348.23 °C, 1008,68 kcal/kg of heat value, 30.07% of efficiency, 97.81 kg/kg of AFR value, but has the lowest engine working capacity (EWC) with 14.65 kg/hours. Based on sensor test, A3 treatment, the voltage of monoxide sensor output is 1.45 mV; 1.81 mV of hydrogen; and methane at 0.66 mV. In the combination of air speed and screw rotational treatment, AFR values were generated by treatment B4 with EWC value of 20 kg/hour and AFR of 97.1 kg/kg. The highest gasmonoxide sensor results in treatment B4 is 1.58 mV; hydrogen 1.98 mV. Based on the length of the enter pipe in the reactor, treatment C1 produces an optimal value of the EWC value at 16.6 kg/hour, the heat energy value is 997 kcal/kg, the efficiency value is 29.73% and the AFR value is 82,87 kg/kg. In treatment C1 the gas monoxide sensor voltage is 1.6 mV; and methane is 1.46 mV. The CFD simulation shows that the distribution of temperature, fluid velocity and pressure in the middle iteration have a significant increase. This can be influenced by the dimensions of powder gasifier cyclone type with CFD simulation.

Kinetika Perubahan Sifat Fisik dan Kadar Tanin Biji Sorgum (Sorghum Bicolor L.) Selama Perendaman Asropi Asropi; Nursigit Bintoro; Joko Nugroho Wahyu Karyadi; Sri Rahayoe; Arifin Dwi Saputro
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Some studies have been done to examine that the soaking process of sorghum seeds decrease the tannin level, but have not yet examined the kinetics of reaction changes during soaking. The aim of this experiment was to study the kinetics of changes on physical characteristics and tannin level of sorghum seeds during soaking. This experiment used milled and not milled red sorghum seeds which were soaked for 24 hours in distilled and alkaline solution at 30, 45, and 60 ºC. Observed parameters included water content, tannin content, and hardness, which were analyzed using statistical data and the kinetics of parameter change rate. Temperature treatment had a significant effect on the changes in all parameters of sorghum seeds during soaking. The increase in temperature accelerated the diffusion coefficient (Deff) in a range between 6.6345x10-12 m2/second to 13.5519x10-12 m2/second and energy activation of 8.054 kJ/mol; 3.274 kJ/mol; 3.183 kJ/mol; and 7.29 kJ/mol on the distilled water soaking treatment of not milled sorghum seeds, alkaline soaking treatment of not milled seeds, the distilled water soaking treatment of milled sorghum seeds, and alkaline soaking treatment of milled seeds. The highest decrease in tannin content was 77.9%, that was obtained in the treatment of alkaline soaking treatment of milled seeds at 60 ºC. The highest increase in volume occurred in the treatment of alkaline soaking treatment of milled seeds (76.0%). The value of the constant rate tended to increase with the increasing temperature of the soaking process. This means that the changes in the parameter were faster at a higher temperature, so the energy activation used is lower.

Efek Pemanasan Skala Rumah Tangga terhadap Komponen Bioaktif Daun Kenikir (Cosmos caudatus) Ardiansyah Ardiansyah; Risqah Fadilah; Dody Dwi Handoko; Bram Kusbiantoro; Rizki Maryam Astuti
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Kenikir leaves (Cosmos caudatus) are one type of vegetable that is commonly consumed in Indonesia both in fresh or cooked forms. The research was aimed to investigate the effect of household scale heating (boiling, steaming, or microwave heating) on the total phenolic content (TPC), antioxidant activity, and bioactive components of kenikir leaves. The research was divided into several stages such as sample preparation, household scale processing method, extraction, TPC analysis by folin-ciocalteu method, antioxidant activity analysis by DPPH method, and bioactive components analysis (caffeic acid and ferulic acid) by a reversed-phase ultra-high-performance liquid chromatography. The TPC of fresh kenikir leaves extract was 148.29–262.36 mg/100 g WB. Boiling or microwave heating for 3 minutes significantly decreased (p<0.05) TPC and antioxidant activity of kenikir leaves, as well as caffeic acid and ferulic acid contents. The steaming or microwave heating for one minute didn’t show significant differences in TPC and antioxidant activity when compared to fresh kenikir leaves. Furthermore, the steaming or microwave heating for one minute could maintain caffeine acid and ferulic acid contents of kenikir leaves. The correlation analysis showed that there was a positive correlation between TPC and antioxidant activity of kenikir leaves (r = 0.904).

Penggunaan Biomassa Limbah Pertanian sebagai Bahan Bakar pada Mini Boiler Tipe Pipa Api 3 Pass Umi Hanifah; Novita Dwi Susanti; Moeso Andrianto
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The use of mini boilers in SMEs is one strategy to improve the efficiency of energy use. This is based on the results of previous work. The use of 3-phase fire tube mini boiler type in tofu SMEs with gas fuel or wood pellets can increase the efficiency of fuel energy use for cooking to about 14.03%–25.58%, save time to about 50%–53%, and save fuel costs for cooking by 44%–45%, compared to cooking tofu using a gas stove. This study was conducted to analyze the performance of 3-phase fire tube mini boiler type with wood pellets or coconut shells as fuel. The testing of mini boilers was conducted related to the capacity/ quantity and quality of steam produced, the energy efficiency of the mini boiler, and the specific costs of steam production (IDR fuel / kJ steam produced) in each type of fuel. The results showed that this mini boiler had a higher value of steam production capacity, steam temperature, steam pressure, and energy efficiency, and specific costs of steam production by using wood pellets as fuel. It also means that using coconut shells as fuel was cheaper, but it gave a lower performance.

Dynamic Modeling of the Drying Process of Corn Grains using Neural Networks Galih Kusuma Aji; Wildan Fajar Bachtiar; Henry Yuliando; Endy Suwondo
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

This study examines the model development of the drying process of corn grains as a dynamic system. The appropriate use of a dynamic model for the drying process of corn grains could lead to an effective method for optimizing the system. The optimal control strategy can be determined by predicting the future behaviors of the process using a dynamic model. In this work, the dynamic characteristic of the water loss of corn grains during dynamics treatment of temperature in the drying process was measured in a continuous manner using a precise load cell. The nonlinear autoregressive with external input (NARX) neural network is used to identify and develop a model of dynamic characteristics of the drying process of corn grains. Then for model training and validation, the dynamic responses of the rate of water loss of corn grains to drying temperature were used. A three-layered NARX neural network model consists of 1-10-1 number neurons of each layer with two times delay was successfully developed to identify and make a model such a complex system. The developed model showed the accuracy of the rate water loss of corn grains during the drying process with the mean square error (MSE), and coefficient of determination (R-squared) values are 1.88892 x 10-4 and 0.891594 consecutively.

Simulasi Kebijakan Penambahan Areal Tanam dan Peningkatan Produktivitas dalam Mendukung Tercapainya Swasembada Jagung Parama Tirta Wulandari Wening Kusuma; Didik Junaedi Rachbini
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Corn is one of five main commodities that is expected to achieve self-sufficiency at the end of RPJMN 2019. However, the gap between supply and demand capacities was still quite large, so that imports are still conducted. The government through the Ministry of Agriculture issued a self-sufficiency policy through extensification and intensification, with the scenario of Planting Areas increase (PAT) of up to 3 million Ha, and productivity increase of up to 53.18 Ku/Ha. This study aims to: (1) measure the achievement of national corn self-sufficiency by establishing a model of national corn availability dynamic system before and after the self-sufficiency policy; (2) develop some policy alternatives for corn self-sufficiency. This article used a dynamic system approach based on secondary data from the Ministry of Agriculture and BPS, determined dynamic hypotheses and systems models, made causal loop diagrams, calculated stock flow diagrams, and validated and verified the models. The results of validation and verification illustrated that the model was made in accordance with the actual conditions that exist. The simulation results showed that increasing the cropping index can continuously achieve maize self-sufficiency until 2019, as well as the scenario of realistic, optimistic extensification (PAT) and the combination of realistic and intensification.

Pendekatan Perolehan Lahan sebagai Alternatif Mitigasi Banjir Surakarta Muhammad Chrisna Satriagasa; Akhmad Makhfatih
agriTECH Vol 39, No 3 (2019)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Surakarta City has experienced various losses due to flooding. Kali Pepe Catchment contributes to flooding that occurs in Surakarta City, mainly by upstream areas dominated by agricultural activities. Land acquisition in the upstream area of Kali Pepe Catchment for reforestation can reduce the river discharge into the downstream region of Surakarta City. This study aimed at 1) making delineation of land acquisition areas, 2) determining the amount of fair replacement value, 3) calculating the amount of river discharge reduction. Analysis of land capability using a geographic information system was used to determine the reforestation area. The fair replacement value was calculated based on the Indonesian Assessment Standard 306, by involving the physical replacement component and non-physical replacement. The amount of river discharge reduction of the Kali Pepe Catchment was calculated using a rational discharge model. The results showed that the delineation of 1.269,67 ha, which is the target of land acquisition in the upstream of the Kali Pepe Catchment, requires a replacement value of IDR 909 billion. This treatment reduced the river discharge by 139.263 lt/sec or 29.4%. River discharge reduction can be a solution in overcoming flooding problems in the downstream region of the Kali Pepe Catchment, Surakarta City.

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Contact Name
Rachma Wikandari

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rachma_wikandari@mail.ugm.ac.id

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+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Rachma Wikandari

Contact Email rachma_wikandari@mail.ugm.ac.id

Phone +6285712601130

Journal Mail Official agritech@ugm.ac.id

Editorial Address Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Rachma Wikandari

Contact Email
rachma_wikandari@mail.ugm.ac.id

Phone
+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA