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Biosolubilization of Indonesia's Subbituminous Coal Using Neurospora intermedia

Journal of Physics: Conference Series 2021年第1期1772卷

作者： Elvi Restiawaty Dwiwahju Sasongko Ahmad Furqon Hala Ryan Fitrian Sofwan Fauzan Nendry Nurramdani Solihah Ardiyan Harimawan Bioenergi Engineering and Chemurgy Study Program Faculty of Industrial Technology Institut Teknologi Bandung. Jl. Let. Jend. Purn. Dr. (HC) Mashudi No.1 Kec. Jatinangor Kab. Sumedang West Java 45363 Indonesia. Biosciences and Biotechnology Research Center Institut Teknologi Bandung. Jalan Ganesa 10 Bandung 40132 Indonesia Chemical Engineering Study Program Faculty of Industrial Technology Institut Teknologi Bandung. Jalan Ganesa 10 Bandung 40132 Indonesia.

Recognizing its high volatile matter content, liquefaction to convert subbituminous coal with relatively low calorific value into liquid fuel by thermal or biological process has been subjected to extensive research. The former has been implemented commercially whereas the latter challenges for further studies. This paper looks into low-rank coal upgrading through subbituminous biosolubilization using Neurospora intermedia as the bioconverting agent. N. intermedia was initially cultured on agar medium containing a carbon source (glucose, sucrose, or cellulose) in a petri dish. After four days cultivation, sterilized coal particles with diameter of 1.5-2.5 mm were spread on N. intermedia culture. It was observed that N. intermedia could grow on the solid culture containing glucose, sucrose, and cellulose. However, the biosolubilization product was only observed from the solid culture with glucose and sucrose as carbon source. The highest biosolubilization rate was 1.07 × 10−3 abs/min and about 83% of coal could be solubilized when the media contained 15 g/L of glucose. The FTIR analysis showed that the spectrum of biosolubilization product was similar to the initial coal spectrum, but it contained small amount of aliphatic C-H group compounds and high amount of carbonyl, hydroxyl, and amine groups.

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