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Abstract
Patchouli farmers are often faced with low quantity and quality of the extracted oil produced by the crop. These are primarily due to lack of understanding in the post harvest technology. Purpose of this study was to determine the rate of change in water content of patchouli for the period of drying process at different rate of air stream velocities and to determine the position of drying trays in dryer that provide the shortest period of bringing the plant material into 14% water content for given air stream velocities. Results indicated that the first and second lower trays (tray1 and tray 2) in the dryer provided the shortest period of drying the material at all air stream velocities. At 90 m min-1 velocity, both trays brought the material into 14 % water content at 21th interval of perception (126 h). Similarly, at 110 m min-1 and 125 m min-1 velocities, the same condition was found at 16th interval of perception (96 h) and 18th interval of perception (108 h), respectively.
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References
Agus, K. dan Ludi, M. 2004. Nilam Tanaman Beraroma Wangi Untuk Industri Parfum dan Kosmetika. Agromedia Pustaka, Tangerang.
Biro Pusat Statistik Propinsi Bengkulu. 1998. Data Tanaman Nilam Propinsi Bengkulu, Bengkulu.
Brooker, DB.,F.F. Baker-Arkema, and C.W. Hall. 1992. Drying and storage of Grains And Oilseeds. An Avi Book. Publised by Van Nostrand Reinhold, New York.
Dewi. R. 1994. Pengaruh berbagai tipe pengeringan terhadap rendemen dan mutu minyak nilam (Pogostemon cablin BENT). Skripsi. Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Bengkulu, Bengkulu. (Tidak dipublikasikan).
Esmay, M.L. and Soemangat. 1973. Grain Drying, Handling and Storage in The Tropics. M.S.U., Michigan.
Early, R. L. 1969. Unit Operations in Food Processing. 2nd Edition. Porgamon Press. British. Diterjemahkan oleh Nasution, C. Satuan Operasi dalam Pengolahan Pangan. Fakultas Teknologi dan Mekanisasi Pertanian. IPB. Bogor.
Hall, P.E,. C.W,. 1980. Drying And Storage of Agricultural Crops. Avi Publishing Company. Westport. Connecticut College of Enginnering Washington State University Pullman, Washington.
Hernani dan Risfaheri. 1989. Pengaruh Perlakuan Bahan Sebelum Penyulingan Terhadap Rendemen dan Karakteristik Minyak Nilam. Balai Penelitian Tanaman Rempah dan Obat, Bogor.
Ketaren. S,. 1985. Pengantar Teknologi Minyak Atsiri. Balai Pustaka, Jakarta.
Rusli. S., dan S. Kemala. 1991. Pengembangan Penelitian Tanaman Atsiri. Balai Penelitian Tanaman Rempah dan Obat, Bogor
Setyahartini. S. 1987. Pengeringan. Jurusan Teknologi Industri Pertanian. Fateta. IPB, Bogor.
Sudaryani, T dan E. Sugiharti. 1989. Budidaya dan Penyulingan Nilam. Penebar Swadaya, Jakarta
Sumarsono, Yuwana, dan Warnoto. 1988. Studi analisis tentang hubungan antara keadaan cuaca setempat dengan hasil panen kacang tanah. Laporan Penelitian. Lembaga Penelitian UNIB, Bengkulu.
Sumarsono. 2000. Kajian Perilaku Pengeringan Biji Kedelai dengan Rotary Dryer. Thesis. Program Pasca Sarjana Universitas Gadjah Mada, Yogyakarta.
Taib.G., G. Said, dan S. Wiraatmadja. 1987. Operasi Pengeringan Pada pengolahan Hasil Pertanian. Melton Putra, Jakarta.
Trubus, 1989. Nilam. Pengenalan Obyek Budidaya Pasca Panen dan Pemasaran. Pusat Informasi Pertanian, Jakarta.