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All Journal Journal of Biobased Chemicals (JOBC)
Maktum Muharja
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Optimization of Subcritical Water Assisted by Nitrogen Before Enzymatic Hydrolisis for Reducing Sugar Production Maktum Muharja; Nur Fadhilah; Rizki Fitria Darmayanti; Dwina Moentamaria; Arief Widjaja
Journal of Biobased Chemicals Vol. 1 No. 1 (2020): Journal of Biobased Chemicals
Publisher : Program Studi Teknik Kimia Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (892.156 KB) | DOI: 10.19184/jobc.v1i1.110

Abstract

The objective of this study is to optimize the three significant parameters of the subcritical water (SCW) process for sugarproduction from coconut husk by using response surface methodology (RSM). In this study, the effect of temperature, reaction time and solvent-feed (S/F) ratio was evaluated and discussed comprehensively. The results showed that the S/F ratio had the most significant effect on sugar yield. The optimal sugar yield was obtained at the highest S/F ratio of 23.4, the shortest time of 4.8 min, and the highest temperature of 183.6 oC of the SCW process. The characterization resultsconfirmed that the lignocellulose structure was changed remarkably then contribute to the efficient processes of enzymatichydrolysis. The parameters evaluation using RSM in this study suggests that SCW hydrolysis could be subjected to commercial purposes.
Optimization of Subcritical Water Assisted by Nitrogen Before Enzymatic Hydrolysis for Reducing Sugar Production Maktum Muharja; Nur Fadhilah; Rizki Fitria Darmayanti; Dwina Moentamaria; Arief Widjaja
JOBC Vol. 1 No. 1 (2020): Journal of Biobased Chemicals
Publisher : University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The objective of this study is to optimize the three significant parameters of the subcritical water (SCW) process for sugar production from coconut husk by using response surface methodology (RSM). In this study, the effect of temperature, reaction time, and solvent-feed (S/F) ratio was evaluated and discussed comprehensively. The results showed that the S/F ratio had the most significant effect on sugar yield. The optimal sugar yield was obtained at the highest S/F ratio of 23.4, the shortest time of 4.8 min, and the highest temperature of 183.6 oC of the SCW process. The characterization results confirmed that the lignocellulose structure was changed remarkably and then contributed to the efficient processes of enzymatic hydrolysis. The parameters evaluation using RSM in this study suggests that SCW hydrolysis could be subjected to commercial purposes.  
Optimization of Sugarcane Bagasse Ash for Paving Blocks Production Helgananta Adirya Sabian; Mutiara Rengganis Nurul Putri Azhari; Maktum Muharja
JOBC Vol. 3 No. 2 (2023): Journal of Biobased Chemicals
Publisher : University of Jember

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Abstract

One of the sugar industries produces large quantities of bagasse ash. Sugarcane bagasse ash in the sugar industry cannot yet be utilized. Sugarcane bagasse ash has a relatively high silica content, namely 68.5%, which can be used as a substitute material to reduce the use of cement in making paving blocks. In this research, concrete bricks were made using the manual pressing method. Paving blocks are made from sand, cement, bagasse ash, stone ash, and water. The cement, stone ash, and sand ratio is 1:2:6, with variations in bagasse ash of 10, 20, and 30% of the sand composition. The test results showed that the highest quality concrete bricks were on the 7th day of drying, with 214 kg/cm2, getting quality B based on SNI 03-0691-1996, and the compressive strength of the resulting concrete bricks would increase as the drying time increased. This innovation can improve the usability of bagasse ash and become a new business opportunity for the sugar industry.
Co-Authors Arief Widjaja Dwina Moentamaria Helgananta Adirya Sabian Mutiara Rengganis Nurul Putri Azhari Nur Fadhilah Rizki Fitria Darmayanti