Acid and Enzymatic Hydrolyses of Rice Bran for Bioethanol Production

Dewi Yuliani (Jurusan Kimia Fakultas Sains dan Teknologi Universitas Islam Negeri Maulana Malik Ibrahim Malang)
Khoirul Achmad Julianto (Jurusan Kimia Fakultas Sains dan Teknologi Universitas Islam Negeri Maulana Malik Ibrahim Malang)
Akyunul Jannah (Jurusan Kimia Fakultas Sains dan Teknologi Universitas Islam Negeri Maulana Malik Ibrahim Malang)

Alchemy : Journal of Chemistry
Vol 6, No 1 (2018): ALCHEMY: JOURNAL OF CHEMISTRY

Rice bran is one among many agricultural by-products containing ~50-60 wt.% of carbohydrate. The carbohydrate is a prominent sugar source for bioethanol production. The objective of this research was to study bioethanol production from rice bran by acid and enzymatic treatment. The variations of acid used were dilute hydrochloric acid and sulphuric acid, while variations of enzyme used were amylolytic and cellulolytic enzyme. Ethanol production of acid-hydrolyzed rice bran was 24.95±1.61% (v/v) by hydrochloric acid and 29.57±2.04% (v/v) by sulphuric acid. Ethanol produced by enzymatic hydrolysis was quite low i.e. 6.7±0.04%, and 8.86±0.29% (v/v) for amylolytic and cellulolytic hydrolysate, respectively. Keywords: Bioethanol, rice bran, acid hydrolysis, enzymatic hydrolysis