Vol. 1 No. 2 (2012): E-Jurnal Agroindustri Indonesia

Articles

• Kata Pengantar

  Dewan Editor (E-Jurnal Agro-Industri Indonesia)
• OPTIMASI PRODUKSI BIODIESEL DARI BIJI JARAK PAGAR MELALUI TRANSESTERIFIKASI IN SITU MENGGUNAKAN METODE RESPON PERMUKAAN

  Ika Amalia Kartika dan Yuyun Pujiastuti (E-Jurnal Agro-Industri Indonesia)

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• MODEL PEMILIHAN TINGKAT TEKNOLOGI, SUMBER PEMBIAYAAN DAN KELEMBAGAAN USAHA DALAM PENGEMBANGAN AGROINDUSTRI BERBASIS NAGARI DENGAN PROSES JEJARING ANALITIK

  Nofialdi, Irawadi Jamaran, Syafrida Manuwoto, Marimin, Yandra Arkeman dan Sapta Raharja

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• PEMBUATAN LABEL/FILM INDIKATOR WARNA DENGAN PEWARNA ALAMI DAN SINTETIS

  Endang Warsiki dan Citra Dewi Wahyono Putri (E-Jurnal Agro-Industri Indonesia)

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• EVALUASI LAYANAN PELANGGAN BERBASIS QUALITY FUNCTION DEPLOYMENT (QFD) STUDI KASUS: PT. MITRA NASIONAL KUALITAS, JAKARTA

  Hasti Purnasari, Taufik Djatna dan Hartrisari Hardjomidjojo (E-Jurnal Agro-Industri Indonesia)

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• ABSTRACT   The increasing of human demand about diesel fuel that was not balanced with the appropriate of petroleum production caused global crisis of energy. Under these conditions, biodiesel is a promising alternative fuel to replace petroleum-based diesel. Jatropha curcas L. can be used as an alternative energy resource because it contains 30-40% oils. Jatropha curcas L. is a plant that can be easily growned in Indonesia, so it is prospective as raw material for biodiesel. The purpose of this study was to determine the influence of reaction time and hexane to total solvent ratio on biodiesel yield and quality produced by in situ transesterification of jatropha seeds. The used raw material was grounded jatropha seeds with moisture content of < 2% and ± 20 mesh size. The operating conditions of hexane to total solvent ratio and reaction time were varied at 1/6, 2/6, 3/6 and 3, 4, 5 h, respectively. KOH concentration, reaction temperature and stirring speed were fixed at 0.075 mol/L methanol, 55oC and 300 rpm. The analysis of biodiesel quality included acid value, viscosity, ash content and saponification value. The results were analyzed with Response Surface Method (RSM). The produced biodiesel yield was 71%-81%. The highest yield (80.67%) and the best quality of biodiesel were obtained under operation condition of the 5 h reaction time and 1/6 hexane to total solvent ratio (acid value of  0.31 mg KOH/g, saponification value of 193.97 mg KOH/g, viscosity of 3.45 cSt, and ash content of 0%). Respon surface analysis of hexane to total solvent ratio and reaction time variables to respon of biodiesel yield resulted first order equation, Y =  63.00– 4.14(A) + 3.81(B), with R2= 95.56%. The variable of reaction time (B) had significant influence on biodiesel yield. Respon surface analysis of operating condition variables to respon of biodiesel quality showed the variable of hexane to solvent ratio (A) and reaction time (B) had significant influence on acid value and viscosity, especially.   Keywords: biodiesel, jatropha, in situ transesterification, reaction time, solvent ratio 

  Fitriyana Ayu Aprilyanti dan Ika Amalia Kartika (E-Jurnal Agro-Industri Indonesia)

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• PREDIKSI PERBAIKAN LAYANAN MENGGUNAKAN METODE ANALISIS BERTAHAN (SURVIVAL ANALYSIS) (STUDI KASUS PT. MITRA NASIONAL KUALITAS JAKARTA)

  Taufik Djatna, Hartrisari Hardjomidjojo dan Tanti Meylani (E-Jurnal Agro-Industri Indonesia)

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• KARAKTERISASI KONDISI OPERASI DAN OPTIMASI PROSES PENGOLAHAN AIR LIMBAH INDUSTRI PANGAN

  Lintang Zulqaida Fitrahani, Nastiti Siswi Indrasti dan Suprihatin (E-Jurnal Agro-Industri Indonesia)

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• PENGGUNAAN SELULOSA MIKROBIAL DARI NATA DE CASSAVA DAN SABUT KELAPA SEBAGAI PENSUBSTITUSI SELULOSA KAYU DALAM PEMBUATAN KERTAS

  Khaswar Syamsu, Renny Pespitasari dan Han Roliadi (E-Jurnal Agro-Industri Indonesia)

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