Efektivitas Penggunaan Bioetanol dari Limbah Padat Alang-Alang (Imperata cylindrica (L) Beauv.) Terhadap Lama Pembakaran Kompor Bioetanol
Submission Date: 2015-01-30 13:07:20
Accepted Date: 2015-03-13 00:00:00
Abstract
Alang-alang (Imperata cylindrica (L.) Beauv.), merupakan tanaman pengganggu pada tanaman padi, tebu, jagung, dan sebagainya. Namun, tanaman ini mengandung bahan selulosa yang dapat dikonversi menjadi gula sederhana, sehingga dapat dijadikan sumber bahan baku ethanol. Penelitian ini bertujuan untuk mengetahui efektivitas ethanol yang berasal dari bahan baku alang-alang (Imperata cylindrica (L.) Beauv.) terhadap lama pembakaran dan titik didih kompor bioetanol. Konsentrasi ethanol 70%, 90% dan 93% digunakan sebagai variasi perlakuan untuk memperoleh ethanol yang efektif sebagai bahan bakar kompor bioetanol. Pada penelitian ini proses pretreatment dilakukan secara mekanis, fisik dan kimiawi terlebih dahulu dengan cara penjemuran, penggilingan dan perendaman NaOH. Selanjutnya proses sakarifikasi menggunakan enzim StargenTM 002 (no cook), lalu fermentasi dengan menambahkan urea, NPK, serta Saccharomyces cereviseae. Dari hasil ini diperoleh bahwa alang-alang yang difermentasi terbukti mampu menghasilkan ethanol sebanyak 600 ml konsentrasi 93% dari hasil destilasi. Ethanol konsentrasi 93% diencerkan menjadi konsentrasi 70% dan 90 %. Dari hasil uji lama pembakaran pada kompor bioetanol dan pengamatan titik didih didapati bahwa ethanol pada konsentrasi 93% adalah perlakuan terbaik untuk bahan bakar kompor bioetanol
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