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All Journal Jurnal Litbang Industri Science and Technology Indonesia
Novia Novia
Universitas Sriwijaya
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Effect of Dilute Acid - Alkaline Pretreatment on Rice Husk Composition and Hydrodynamic Modeling with CFD Novia Novia; Vishnu K Pareek; Hermansyah Hermansyah; Asyeni Miftahul Jannah
Science and Technology Indonesia Vol. 4 No. 1 (2019): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (846.51 KB) | DOI: 10.26554/sti.2019.4.1.18-23

Abstract

The high cellulosic content of rice husk can be utilized as a feedstock for pulp and biofuel. Pretreatment is necessary to break the bonds in the complex lignocellulose matrices addressing the cellulose access. This work aims to utilize the rice husk using dilute acid and alkaline pretreatment experimentally and CFD modeling. The study consists of three series of research. The first stage was the dilute acid pretreatment with sulfuric acid concentration of 1% to 5% (v/v) at 85°C for 60 minutes, and alkaline pretreatment with NaOH concentration of 1% to 5% (w/v) at 85oC for 30 minutes separately. The second stage used the combination of both pretreatment. Moreover the last stage of research was hydrodynamic modeling of pretreatment process by CFD (ANSYS FLUENT 16). The experimental results showed that the lowest lignin content after acid pretreatment was about 10.74%. Alkaline pretreatment produced the lowest lignin content of 4.35%. The highest cellulose content was 66.75 % for acid-alkaline pretreatment. The lowest content of lignin was about 6.09% for acid-alkaline pretreatment. The lowest performance of alkaline pretreatment on HWS (hot water solubility) of about 7.34% can be enhanced to 9.71% by using a combination alkaline-acid. The combined pretreatments result hemicellulose of about 9.59% (alkaline-acid) and 9.27% (acid-alkaline). Modeling results showed that the mixing area had the minimum pressure of about -6250 Pa which is vortex leading minimum efficiency of mixing. The rice husk flowed upward to the upper level and mixed with reagent in the perfect mixing.
Hidrolisis enzimatik selulosa sekam padi menggunakan crude enzim dari Aspergillus niger untuk produksi bioetanol Novia Novia; Elda Melwita; Selpiana Selpiana; Nur Hafidzah Deviyana; Violetta Viola
Jurnal Litbang Industri Vol 13, No 2 (2023)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v13i2.8052.161-167

Abstract

Bioetanol merupakan bahan bakar yang berbahan baku tanaman yang telah melalui proses fermentasi. Tanaman yang memiliki kandungan selulosa tinggi untuk diproduksi menjadi bioethanol adalah sekam padi. Produksi bioetanol dari sekam padi melibatkan proses hidrolisis enzimatis yang bertujuan untuk menghasilkan gula dan selanjutnya difermentasi menghasilkan bioetanol. Pada penelitian ini, proses hidrolisis enzimatis dilakukan dengan bantuan crude enzim selulase dari Aspergillus niger pada berbagai konsentrasi enzim selulase (2 - 6 % v/w) dan waktu hidrolisis (5 – 25 jam). Kadar gula optimum diperoleh sebesar 6.03 g/L pada saat konsentrasi enzim 6 % dan waktu hidrolisis 25 jam. Kadar etanol tertinggi diperoleh sebesar 7.5% (v/v).
Co-Authors Asyeni Miftahul Jannah Elda Melwita Hermansyah Nur Hafidzah Deviyana Selpiana, Selpiana Violetta Viola Vishnu K Pareek