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Uji keandlan model sacramento pada DAS Bedadung dan DAS Kloposawit

Jurnal AGROTEKNOLOGI Vol 4, No 1 (2010)
Publisher : Jurnal AGROTEKNOLOGI

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Abstract

Sacramento model is once of rainfall runoff library (RRL) model which used to measure the flo component that include rainfall, evaporation and discharge.

UJI KEANDALAN MODEL SACRAMENTO PADA DAS BEDADUNG DAN DAS KLOPOSAWIT

Jurnal AGROTEKNOLOGI Vol 4, No 1 (2010)
Publisher : Jurnal AGROTEKNOLOGI

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Abstract

Sacramento model is once of rainfall runoff Library (RRL) model which used to measure the flow components that include rainfall, evaporation and discharge. Sacramento model using soil moisture measurements to simulate the water balance at the catchment area. Sacramento model is a relatively new model so needs to be done the testing of this model. The testing process is often used for modeling is a process of calibration and validation. Aim this study is to evaluate the feasibility of the Sacramento model to be applied in the Bedadung and Kloposawit watershed and compare the optimal parameters the both watersheds on the basis of their characteristics. The methodology used is the calibration and validation. Calibration is done by automatic methods (generic) and the method of trial and error (manually) while the method for validating is simple-sample test. The results showed that the Sacramento model proper to applied in the Bedadung and Kloposawit watershed. This is indicated by the Nash coefficient, the coefficient of correlation and bias. By using generic methods on Bedadung watershed available the Nash coefficient value of 0.849, the correlation coefficient for 0.993 and bias of 8.11. Meanwhile, if using manual methods will be obtained the Nash coefficient for 0.906 and correlation coefficient equal to 0.997. While the generic calibration method in the Kloposawit watershed available the Nash coefficient values obtained for 0,894, the correlation coefficient for 0.967 and bias of 11.11. Meanwhile, if using manual methods will be obtained for Nash coefficient is 0.918 and correlation coefficient equal to 0968. The method of validation model with a simple -sample test. The result of validation for Klopo sawit watershed is the Nash coefficient value of 0.913 and the correlation coefficient for 0.989. While the Bedadung watershed is the Nash coefficient value of 0.860, the correlation coefficient for 0.991.Keywords: sacramento, calibration, validation, simple-sample test, nash coefficient

PENINGKATAN MUTU BIJI KOPI RAKYAT DENGAN PENGOLAHAN SEMI BASAH BERBASIS PRODUKSI BERSIH

Jurnal AGROTEKNOLOGI Vol 4, No 1 (2010)
Publisher : Jurnal AGROTEKNOLOGI

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Abstract

Application of semi-wet processing in coffee post harvest is one effort to improve smallholder coffee bean quality, eventhough produce wastewater that harmfull for environmental. By implementing cleaner production concept with water minimization could solve environmental problems while maintaining the coffee bean. The purpose of this study was to determine the effect of semi-wet processing based on water minimization on coffee quality. Coffee berries are treated by minimize water design to produce coffee bean. Quality testing includes water content analysis, physical quality test based on SNI standards and cup test (sensory test). Coffee bean samples from semi-wet processing are compare with coffee bean from dry process and Sidomulyo smallholder. The results showed selective picking during harvest and semi-wet processing affects physical quality. Water process minimization showed no difference on physic and sensory quality of coffee beans. Though physical assessment cannot fully guarantee the beverage quality, but could anticipate most of defects flavored coffee drink. Conversely, the error in estimating of coffee taste based on physical properties can be minimized by cup test. Although, the sensoric assessment is subjective likely, but the cup test showed there is effect of semi-wet processing to the quality of coffee drinks as a final product.Keywords: coffee quality, coffee bean, semi-wet processing, water minimization, cleaner production

Studi kemampuan zeolit sebagai adsorben untuk menjerap zat besi (Fe) pada unit penyaring air

Agrotek Vol 1, No 2 (2008): Agrotek
Publisher : Universitas Papua

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Abstract

Water is a basic requirement of human life process. Filtration is one of method to obtain suitable water supply consume. Filtration unit is consist of physical and chemical filter. Chemical filter can adsorp particles of solute in water, of application is to reduce over iron (Fe) content in water. The ability of chemical filter to adsorp iron particles depends on pore space or cavity which it have. This ability can be measured by knowing relation among adsorption model coefficient and large surface area of chemical filter ability taking particles. Zeolit have a large surface area, cause that zeolit can be used as chemical filter (adsorbent) to take Fe in water filtration process. The aim of experiment is to know the adsorption ability of zeolit to Fe, to determine aquilibrium adsorption coefficient models in every size of zeolit and determining of zeolit size which suitable to used as adsorbent in water filtration unit. The variation of zeolit size which is used are £ 4,75 mm, > 4,75 mm – 9,5 mm dan > 9,5 mm. Whereas, Fe concentration which is used are 1 mg/L, 2 mg/L, 3 mg/L dan 4 mg/L. Parameters which is measured are pH and Fe concentration before and after filtration or adsorption process. The result of experiment shows that zeolit with > 4,75 mm – 9,5 mm size have the highest adsorption ability, with Fe concentration adsorbed 0,718 mg/L until 3,588 mg/L and average adsorption efficiency 82,96 % and have highest equilibrium adsorption coefficient model with KF value 178,6899 and n value 0,2297. So that, zeolit with > 4,75 mm – 9,5 mm size is more suitable to usd as adsorbent in water filtration unit

POTENSI PENERAPAN PRODUKSI BERSIH DI PETERNAKAN SAPI PERAH CV. MARGO UTOMO KECAMATAN KALIBARU KABUPATEN BANYUWANGI

JURNAL AGROTEKNOLOGI Vol 12 No 02 (2018)
Publisher : Faculty of Agricultural Technology, University of Jember

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Abstract

CV Margo Utomo dairy farm has approximately 99 cows. Livestock activities include feeding, cage cleaning, milking and livestock bathing. High feed and water requirements resultes high amounts of waste feed and waste produced. If wastewater discharged into channel, it could cause water pollution and could reduce environment. There were two types of waste water. The wastewater that disposed directly wastewater in to channel and the wastewater that settled in basin for three days. Steps of this research included field observation, secondary and primary data collection, problem identification, clean production alternatives identification, feasibility analysis and alternative selection based on priority scale of alternative clean production actions. Feasibility analysis includes technique, environment and economy. Assessment of feasibility based on assessment indicators in the form of questionnaires. This study used NPV, IRR, B / C Ratio, and PBP. There were three alternatives based clean production, that could be applied at the CV. Margo Utomo, such as biogas, water recycle , and cleaning pool for cows. Based on these alternatives, biogas was a best priority to applied in the CV. Margo Utomo dairy farm. Keywords: biogas, clean production, dairy farm, wastewater

OPTIMASI PENGGUNAAN KOAGULAN ALAMI BIJI KELOR (Moringa oleifera) PADA PENGOLAHAN LIMBAH CAIR MOCAF

JURNAL AGROTEKNOLOGI Vol 8 No 02 (2014)
Publisher : Faculty of Agricultural Technology, University of Jember

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Abstract

The use of moringa plant seeds as a natural coagulant has economic value and environmental friendly. They also can be used to purify water, so that the seeds were able to decrease the pollution concentration of mocaf wastewater. The aim of this research was to study the ability of moringa seeds, as a natural coagulant to overcome mocaf wastewater pollution. The method was used coagulation-flocculation with coagulant dosage range of 650 mg/l untill 1050 mg/l. The variables observed were turbidity, TSS, TDS and COD. The results showed that the optimum coagulant dose and the optimum pH is 850 mg/l and pH 8 with 59,79% decreased levels of turbidity, 75,46% TSS reduction rate and 32,55% COD reduction rate level. However the TDS values after treatment was greater than the TDS value before. It can be conclude that the use of Moringa seed powder was effective sufficiently as a coagulant for mocaf wastewater.Keywords: kelor seeds, liquid waste mocaf, turbidity, TSS, TDS and COD

Analisis Keberlanjutan Kawasan Usaha Perkebunan Kopi (KUPK) Rakyat di Desa Sidomulyo Kabupaten Jember

Agritech Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

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Abstract

Sidomulyo village, Silo region is one of main small holder coffee producer at Jember district. Unpredictable world production and price can cause unsustainability of small holder coffee production. The research objective was to evaluate sustainability of small holder coffee plantation in Sidomulyo, Jember district. Based on purposive and random sampling survey, questionnaire and discussion with key persons were implemented in this research in collecting data. Dimension of ecology, social institutional, economic and technology were analyzed using Rap-Coffee program modified from Rapfi sh software. The result reveals that from four dimensions implemented in this research, the sustainability index was 59,5 % means that activity of small holder coffee plantation at Sidomulyo still have sustainability as a coffee production unit. This index could be increased through factors improvement of each dimension. The improvement of high sensitivity attributes in each dimension is strongly needed to develop better regulation to support the continuity of small holder plantation of coffee production unit at Sidomulyo.ABSTRAKDesa Sidomulyo, Kecamatan Silo merupakan salah satu sentra produksi kopi rakyat utama di Kabupaten Jember. Perkembangan produksi dan harga kopi dunia yang tidak pasti dapat berimplikasi terhadap keberlanjutan usaha pertanian kopi rakyat. Tujuan penelitian ini adalah untuk mengevaluasi keberlanjutan usaha kopi rakyat di Desa Sidomulyo, Kabupaten Jember. Berdasarkan purposive and random sampling survey, penelitian ini menggunakan kuesioner dan diskusi dengan pihak terkait dalam pengambilan data. Dimensi ekologi, sosial kelembagaan, ekonomi dan teknologi dianalisis dengan menggunakan program Rap-Coffee hasil modifi kasi dari program Rapfi sh. Berdasarkan simulasi program Rap-Coffee untuk keempat dimensi keberlanjutan, maka Indeks Keberlanjutan KUPK Desa Sidomulyo adalah 59,5 % yang berarti berlanjut. Indeks keberlanjutan ini dapat ditingkatkan melalui perbaikan terhadap faktor pengungkit (indikator sensitif). Oleh karena itu di dalam perencanaan kebijakan untuk pengembangan KUPK Desa Sidomulyo sebaiknya memprioritaskan pada peningkatan indikator yang memiliki sensitivitas tinggi di masing-masing dimensi.

PENINGKATAN MUTU BIJI KOPI RAKYAT DENGAN PENGOLAHAN SEMI BASAH BERBASIS PRODUKSI BERSIH

JURNAL AGROTEKNOLOGI Vol 4 No 01 (2010)
Publisher : Faculty of Agricultural Technology, University of Jember

Show Abstract | Original Source | Check in Google Scholar | Full PDF (546.69 KB)

Abstract

Application of semi-wet processing in coffee post harvest is one effort to improve smallholder coffee bean quality, eventhough produce wastewater that harmfull for environmental. By implementing cleaner production concept with water minimization could solve environmental problems while maintaining the coffee bean. The purpose of this study was to determine the effect of semi-wet processing based on water minimization on coffee quality. Coffee berries are treated by minimize water design to produce coffee bean. Quality testing includes water content analysis, physical quality test based on SNI standards and cup test (sensory test). Coffee bean samples from semi-wet processing are compare with coffee bean from dry process and Sidomulyo smallholder. The results showed selective picking during harvest and semi-wet processing affects physical quality. Water process minimization showed no difference on physic and sensory quality of coffee beans. Though physical assessment cannot fully guarantee the beverage quality, but could anticipate most of defects flavored coffee drink. Conversely, the error in estimating of coffee taste based on physical properties can be minimized by cup test. Although, the sensoric assessment is subjective likely, but the cup test showed there is effect of semi-wet processing to the quality of coffee drinks as a final product.Keywords: coffee quality, coffee bean, semi-wet processing, water minimization, cleaner production

PEMETAAN DAN EVALUASI TEKNIS JARINGAN DISTRIBUSI AIR BERSIH DI DESA KEMUNING LOR

JURNAL AGROTEKNOLOGI Vol 10 No 02 (2016)
Publisher : Faculty of Agricultural Technology, University of Jember

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Abstract

This research aims to describe water distribution network and to evaluate technical performance of water distribution network. Research was implemented at Kemuning Lor village, sub-district Arjasa, in Jember Regency. This village located at about 12 km from Jember City to the direction of Argopuro mountain areas. Field survey a long the network was effectued using GPS. Secondary data were obtained from interview with stakeholders at the vilalage. The Map was produced by means of QGIS. Technical evaluation of physical network performance was done using EPANET version 2.0 software. The main input for this study are: discharge measurement, GPS data, datum, length of segment, pipe-diameter and roughness coefficient. The output data in the form of pressure and speed of the water at the junction. Furthermore, the result from EPANET are then compared to existing standard parameters. This research produce a map that visualize the water distribution network and the report of network performance in technical aspect. Finally, it is conclude that in general the existing water distribution netowork is still in compliance with the standard. However, at a fews locations on the network need to be adapted to the existing standard of pressure and speed. Keywords: network, water distribution, Epanet, evaluation of performance

BEBAN PENCEMARAN KALI JOMPO DI KECAMATAN PATRANG-KALIWATES KABUPATEN JEMBER

JURNAL AGROTEKNOLOGI Vol 12 No 01 (2018)
Publisher : Faculty of Agricultural Technology, University of Jember

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Abstract

Jompo River is one of many tributaries in Jember District has become one of the water source for inhabitant around use for their daily needs. People activities can make water quality in Jompo River has been polluted gradually. The measurement need to knows water quality and polution load which enter in to Jompo River.  Location of research was start form Patrang to Kaliwates District with six node and  distantance 625 m. each node. This research was conducted in March-July 2017. Based on data analysis, average value of water quality ​​ were TSS was 67 mg / l, TDS was 104.78 mg / l, pH was 6.73, DO was 8.34 mg / l, and BOD was 1.20 mg / l. Based on Government Regulation No. 82 of 2001, the Jompo river water quality was included in class II criteria. The highest pollution load was at the 6th node of 394.39 kg/day. Jompo River has an average reaeration rate of 0.65 mg / l.day and deoxygenation rate of 0.284 mg / l.day. The river was ability to accomodate of pollution load because the rate of reaeration rate was higher than the value of deoxygenation rate. Keywords: Jompo River, pollution load, water quality