Abstract
The utilization of sago as a product which have higher value have not used maximally yet. Sago (Metroxylon spp.) is one of original plant from Indonesia which could be used as raw material for bioethanol. The objectives of the study were to analyze production of bioethanol with the variation of yeast Saccharomyces cereviceae concentration added (7%, 12%, 17%), fermentation time were (5 days and 7 days) and analysis of the financial feasibility industry from sago palm. The methods of the study analyze the financial feasibility by NPV, IRR, Net B/C, PBP, and sensitivity analysis. The result showed that fermentatiom time 7 days and yeast consentration 12% is the optimum tretments producted bioethanol from sago which result consentration 3,05% (v/v). The financial feasibility are Net Present Value is positive amounted Rp . 125 859 652 242, Internal Rate of Return of 17%, Net B/C ratio by 1,53, Payback Period for 6 years, and Sensitivity analysis showed that the 12% increase in raw material and 8% decrease in selling price, effect on the viability of the project. From the above considerations investment criteria, indicates that the business of bioethanol based on sago is feasible to run.
Highlights
Indonesia merupakan negara dengan sumberdaya alam yang melimpah
Paper must be submitted to http://journal.trunojoyo.ac.id/agrointek/index and journal template could be download here
The abstract is a condensed version of an article, and contains important points ofintroduction, methods, results, and conclusions
Summary
Bahan yang digunakan dalam produksi bioetanol ini adalah batang sagu, HCl, enzim alfa amilase, glukoamilase, Saccharomyces cerevisiae, NPK, urea, air dan NaOH, Alat yang digunakan dalam penelitian meliputi timbangan analitik, termometer, tabung reaksi, gelas ukur, pipet, pH meter, labu ukur, botol fermentor, panci, kompor, erlenmeyer, autoklaf, pengaduk, lemari pendingin, destilator, alat tulis, dan laptop. Sebanyak 200 g sagu dihidrolisis dengan HCl dengan konsentrasi 3% sebanyak 1.600 ml (1:8) yang dilakukan dengan suhu 90-97 oC selama 5 menit. Selanjutnya hidrolisat asam dihidrolisis kembali dengan dimasukkan ke dalam erlenmeyer 250 mL lalu ditambahkan enzim α-amilase dengan konsentrasi 0,5% (b/b) sampel sagu pada suhu 90-95 oC selama 30 menit. Selanjutnya pH diatur pada angka 4-5 dan enzim glukoamilase ditambahkan sebanyak 0,1% (b/b), setelah itu larutan dipanaskan dengan suhu 60 oC selama 3 jam. Sagu yang telah mengalami hidrolisis dimasukkan dalam botol fermentor, selanjutnya ditambahkan NPK dan urea sebagai nutrisi dengan variasi konsentrasi masing-masing bahan 0,006% (b/b) dan 0,5% (b/b) (Seftian et al, 2012). Selama proses fermentasi berlangsung pengukuran pH dilakukan dengan menggunakan pH meter setiap 24 jam. Etanol hasil destilasi diukur volumenya dan ditentukan konsentrasinya yang berdasarkan metode Specific Grafity
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