https://ph02.tci-thaijo.org/index.php/MIJEEC/issue/feed 2024-06-17T22:45:26+07:00 Dr. Rameshprabu Ramaraj rameshprabu@mju.ac.th Open Journal Systems <p><span id="ContentBody_cBody_LabelAbout">Maejo International Journal of Energy and Environmental Communication (Maejo Int. J. Energ. Environ. Comm. or MIJEEC), the international journal for the publication of all preliminary communications in Environmental Science, Applied Science and Energy Engineering is one of the peer-refereed journals of Maejo University. ISSN: 2673-0537; ISSN: 2774-0064 (Online) Frequency: 3 issues/year.&nbsp;</span></p> https://ph02.tci-thaijo.org/index.php/MIJEEC/article/view/253749 2024-04-21T11:42:29+07:00 Techut Promta techusteboeing@hotmail.com Panomtian Thonkamdee k.sasujit@yahoo.com Kittikorn Sasujit k.sasujit@yahoo.com

<p class="p1">This research aimed to study of the sugarcane bagasse was used as a raw material for ethanol production and pretreatment with 2.0% dilute H_{<span class="s1">2</span>}SO_{<span class="s1">4</span>} at 121^{<span class="s1">o</span>}C for 60 min. <em>Pichia </em><em>stipitis</em> (TISTR 5806) was a microorganism for fermentation. However, acid hydrolysis produces inhibitory compounds like furans, phenolics, and organic acids. Overliming with Ca(OH)_{<span class="s1">2</span>}is a detoxification process that removes these compounds and improves ethanol fermentation. Optimal conditions were determined using RSM and CCD frameworks. The study established specific ranges for the operation conditions: 7–12 for pH, 20–60^{<span class="s1">o</span>}C for reaction temperature, and 30–90 min for reaction time. The results indicated that the optimal conditions for detoxification were a pH of 9.5, a reaction temperature of 40^{<span class="s1">o</span>}C, and a reaction time of 60 min. The analysis revealed the removal of total furans at 38.37% and total phenolics at 50.02%. The fermentation of hydrolysate and detoxified hydrolysate found an ethanol yield of 0.22 and 0.30 g_{<span class="s1">product</span>/}g_{<span class="s1">substrate</span>,} respectively, and a theoretical yield of 43.42% and 57.96%, respectively. Overliming Ca(OH)_{<span class="s1">2</span>} could be an efficient detoxification process for removing and reducing the effects of inhibitory compounds in sugarcane bagasse hydrolysate.</p>

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