Kakalia Putri Auralita
Department of Chemical Engineering, Faculty of Engineering, Universitas Negeri Semarang, Indonesia

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Utilization of Palm Solid Residue For Bioethanol Production In Sumatra Indonesia – A Review Anggun Enjelita; Kakalia Putri Auralita; Resah Aprianti; Zahra Afifa Indrajaya; Ivan Maulana
Journal of Clean Technology Vol. 1 No. 1 (2024): February 2024
Publisher : Universitas Negeri Semarang

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Abstract

The combustion of fossil fuels causes an increase in the release a group of gases found in the earth atmosphere that trap heat and contribute to the greenhouse effect, which in turn contributes to the occurrence of global warming. The advancement of sustainable energy sources plays an important role in human life due to renewable and environmentally friendly. This problem can be resolved by using alternative fuels as renewable sources of energy that are more environmentally friendly, such as bioethanol. Empty fruit bunches (EFB) constitute a portion of the solid waste that cause problems in storage, transportation, and processing costs. This is because EFB is waste in a solid that is produced from a processing facility where the fruits of the oil palm tree are processed to extract palm oil in large quantities. The process of producing bioethanol by utilizing coconut fruit bunches that are devoid of their contents as a raw material involves two essential stages: hydrolysis and drying. Hydrolysis with an acid catalyst results in a lower yield, but the catalyst itself is inexpensive. Conversely, when using enzyme catalysts, hydrolysis produces a greater quantity of reducing sugars. Enzyme catalysts can be employed in the simultaneous saccharification and fermentation (SSF) process using S. cerevisiae yeast, while chemical catalysts can be used in separate hydrolysis and fermentation (SHF) methods. The SSF method provides a comparatively elevated ethanol yield, demands less enzyme usage, has a shorter duration for ethanol production, and is environmentally friendlier when compared to the SHF procedure.
Zero Waste Education Organic Waste Treatment For Students ofSD N Petompon 3, Semarang, Indonesia Irene Nindita Pradnya; Maulida Zakia; Zuhriyan Ash Shiddieqy Bahlawan; Kakalia Putri Auralita; Achmad Wikandaru; Daffa Nur Muhammad
Journal of Clean Technology Vol. 1 No. 2 (2024): August 2024
Publisher : Universitas Negeri Semarang

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SDN Petompon 3 in Semarang faces challenges related to inadequate facilities and poor environmental sanitation due to improper waste management. To address these issues, a community service program has been initiated. The program aims to educate 5th and 6th-grade students about organic clean waste management using Black Soldier Fly larvae (maggots). Through this program, students are taught how to sort, recycle, and process organic waste. They are also directly involved in practical waste management activities at the school. The primary objectives of this program are to raise students' environmental awareness and encourage them to become agents of change. Additionally, the program aims to address the issue of organic waste management in the school by utilizing the effective waste decomposition capabilities of Black Soldier Fly larvae. The resulting products from the organic waste processing, such as pupae, can be used as animal feed or as raw materials for organic fertilizer. The program also includes an entrepreneurship development component. Students are taught packaging, branding, and marketing skills to run small businesses. It is hoped that students can develop entrepreneurial skills and create sustainable business opportunities. The program is carried out through several stages, including coordination with the school, preparation of tools and materials, and the implementation of socialization and practical activities. Through this program, it is expected that environmental problems at SDN Petompon 3 can be gradually resolved and increase students' awareness and active participation in maintaining environmental cleanliness.