Indonesia is the largest sago feedstock in the world. There are about 2 millions ha sago forest that approximately half of the world's sago forest is present in Indonesia. Naturally, sago spreads widely in Papua, while semi-cultivation is in Maluku, Sulawesi, Borneo, and Sumatra. The species sago (Metroxylon sago) was used in this study. It has a relatively high starch content (95.99%) with low amylose content (20.61%) and low protein content (1.63%). Modified sago flour is a product from sago flour that modified with fermentation to increase the nutritional value of the sago flour. It can be used as a gluten free flour and low-calorie food products. The bacteria (Lactobacillus plantarum) was used in the fermentation. However, the color of the modified sago flour is off-white, if the fermentation time is too long. Therefore, it is necessary to investigate the effect of fermentation time and initial bacteria cells number on increasing nutritive value of sago flour. The variables used were fermentation times (12, 24, and 36 h) and initial bacteria cells number (7 x 1010, 7 x 1011, 1.05 x 1012, and 3,05 1012 cells of L. plantarum). The result showed that amylose and protein content increased from 20.61% to 33,06% and from 1.41% to 4.11%, respectively, with bacterial variables of 3,5 x 1012 and fermentation time of 36 h.
Dalam penelitian ini telah dilakukan perancangan pabrik Tepung singkong termodifikasi berbahan dasar singkong dengan kapasitas sebesar 300.000 Ton/tahun, waktu operasi 24 jam dan 300 hari/tahun. Tujuan perancangan pabrik Tepung singkong termodifikasi ini adalah untuk mensubstitusi kebutuhan tepung terigu Indonesia sehingga mampu menekan nilai impor tepung terigu. Pabrik Tepung singkong termodifikasi ini direncanakan akan didirikan di Kabupaten Wonogiri, Provinsi Jawa Tengah. Alasan pemilihan tempat ini adalah karena tersedianya sarana transportasi darat dan laut, ketersediaan listrik, air dan pemasaran produk dapat dilakukan di daerah sekitar pabrik dan luar pulau karena posisinya yang berada di tengah Indonesia. Proses yang digunakan dalam pabrik ini yaitu proses fermentasi dengan menggunakan bakteri Lactobacillus plantarum selama 5 hari untuk meningkatkan kadar protein tepung sehingga dapat mensubstitusi kandungan nutrisi dari tepung terigu itu sendiri. Proses dalam pabrik ini terdiri dari 3 tahap utama yaitu tahap persiapan bahan baku, tahap fermentasi, dan tahap penepungan. Sumber dana investasi berasal dari modal sendiri sebesar 60% biaya investasi dan modal pinjaman sebesar 40% biaya investasi dengan bunga sebesar 10,5% per tahun. Dari analisa perhitungan ekonomi didapat hasil investasi Rp 473.098.662.000 dengan IRR 44%, POT 2 tahun 3 bulan, dan BEP 17,82%
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