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All Journal International Journal of Renewable Energy Development Jurnal Ilmu Lingkungan RELE: Rekayasa Elektrikal dan Energi Jurnal Teknik Elektro Indonesia Journal of Halal
S Suherman
Program Studi Magister Ilmu Lingkungan, Program Pasca Sarjana
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science

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Journal : International Journal of Renewable Energy Development

 1 
Energy Efficient Dryer with Rice Husk Fuel for Agriculture Drying Djaeni, M.; Asiah, N.; Suherman, S; Sutanto, A.; Nurhasanah, A.
International Journal of Renewable Energy Development Vol 4, No 1 (2015): February 2015
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.4.1.20-24

Abstract

Energy usage is crucial aspect on agriculture drying process. This step spends about 70% of total energy in post harvest treatment. The design of efficient dryer with renewable energy source is urgently required due to the limitation of fossil fuel energy. This work discusses the performance of air dehumidification using rice husk fuel as heat source for onion, and paddy drying. Unlike conventional dryer, the humidity of air during the drying was dehumidified by adsorbent. Hence, the driving force of drying can be  kept high.  As consequences, the drying time and energy usage can be reduced. Here, the research was conducted in two step: laboratory and pilot scale tests. Results showed that the lowering air humidity with rice husk fuel has improved the energy efficiency. At operational temperature 60oC, the heat efficiency of 75%  was achieved. 
Biodiesel Production from Rubber Seed Oil via Esterification Process Widayat, Widayat; Suherman, S
International Journal of Renewable Energy Development Vol 1, No 2 (2012): July 2012
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.1.2.57-60

Abstract

One promise source of alternative energy is biodiesel from rubber seed oil, because the raw materials available in plentiful quantities and can be renewed. In addition, the rubber seed is still lack of utilization, and Indonesia is one of the largest rubbers producing country in the world. The objective of this research is to studied on biodiesel production by esterification process. Parameters used in this study are the ratio of catalyst and temperature and its influence on the characteristics of the resulting biodiesel product. Characterization of rubber seed include acid content number analysis, saponification numbers, density, viscosity, iodine number, type of free fatty acids and triglyceride oils. The results of analysis showed that rubber seed oil content obtained is 50.5%. The results of the GCMS analysis showed that a free fatty acid level in rubber seed is very high. Conversion into bio-diesel oil is obtained by at most 59.91% and lowest 48.24%.
Co-Authors . Widayat A. Nurhasanah A. Sutanto Ahmad Subulas Salam Evalina, Noorly Hasibuan, Akbar Kurnia M. Djaeni Melia Ariyanti, Melia N. Asiah Nasution, Elvy Sahnur P Purwanto Pasaribu, Faisal Irsan Silviana Silviana