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All Journal HAYATI Journal of Biosciences AJIE (Asian Journal of Innovation and Entrepreneurship) Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan
Prawitasari, Diah Ayu
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Mathematics Physics Social Sciences

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Potensi Limbah Hasil Pertanian Padi menjadi Sumber Bioenergi melalui Konsep Biorefineri dengan Pendekatan P-Graph dan Analisis Ekonomi Teknik di Kabupaten Sleman, Yogyakarta: Indonesia Prawitasari, Diah Ayu
Asian Journal of Innovation and Entrepreneurship Volume 09, Issue 01, January 2025
Publisher : UII

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/ajie.vol9.iss1.art2

Abstract

Agricultural waste, especially from rice such as straw, husks, and bran, is one of the abundant biomasses in Indonesia, particularly in Sleman Regency, DI Yogyakarta, which is one of the regions with the highest rice productivity. The potential of rice waste can be used as a source of bioenergy using a biorefinery approach. The concept of a biorefinery is the processing of biomass that produces various products and by-products to achieve sustainability. The analysis of the potential of this biomass waste was conducted using p-graph and techno-economics. Based on the optimization analysis with the p-graph, the optimal and maximal solutions were obtained after running the superstructure flow. The optimal solution indicates that the transesterification process of rice bran into biodiesel is more feasible with a profit of 9000 USD/year. For the maximal solution, an economic analysis was conducted because the products generated are more numerous, allowing for the implementation of a biorefinery approach. The results of the techno-economic analysis show that the production of several bioenergy products will fully recoup the initial investment by the 8th year. The IRR value obtained is 21.7%, while the MARR (Minimum Attractive Rate of Return) is 15%, indicating that the investment is viable for funding. Additionally, from an environmental perspective, the use of biomass waste for bioenergy production has a positive impact by reducing greenhouse gas emissions and pollution, as well as enhancing soil fertility through the application of biochar. From a social perspective, community-based bioenergy production can increase income, improve community welfare, enhance bioenergy production, and support energy independence and sustainability.
Implementasi Environmental Education Day: Water, Climate, and Sustainability di SDN Sardonoharjo 1 melalui Hands-On dan Game-Based Learning untuk Membangun Literasi Iklim Berkelanjutan Prawitasari, Diah Ayu; Nuurussyahba, Wahda Annisa; Mustofa, Ikrom
Panthera : Jurnal Ilmiah Pendidikan Sains dan Terapan Vol. 5 No. 4 (2025): October (In Progress)
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/panthera.v5i4.757

Abstract

The Environmental Education Day: Water, Climate, and Sustainability activity at SDN Sardonoharjo 1 was implemented to foster sustainable climate literacy among elementary school students through an interactive and contextual learning approach. This activity employed a descriptive qualitative method with a single case study design, involving fourth, fifth, and sixth-grade students in a series of hands-on and game-based learning activities tailored to their developmental levels. The results show that this learning model significantly improved students’ understanding of water and climate concepts through concrete and enjoyable learning experiences. Students demonstrated enhanced ability to relate the hydrological cycle and climate change concepts to real-world phenomena and logically identify the causes and impacts of climate change. Furthermore, the activity strengthened 21st-century skills such as critical thinking, communication, collaboration, and creativity, as evidenced by active participation, problem-solving ability, and the quality of student-produced posters. Other findings indicate an increase in ecological awareness and environmentally friendly behavior, reflected in students’ reflective attitudes during games and classroom discussions. This program proved effective in instilling sustainability values from an early age and can serve as a replicable learning model for strengthening environmental education at the elementary school level.
Biotransformation of the Textile Dye Reactive Black 5 with Aspergillus niger and Analysis of Ligninolytic Enzyme Activity Prawitasari, Diah Ayu; Kardena, Edwan
HAYATI Journal of Biosciences Vol. 33 No. 2 (2026): March 2026
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.33.2.297-309

Abstract

Removal of textile dye using biological processes is considered more cost-effective, generates no hazardous byproducts, and is ecologically friendly. This study analyzes the removal of the synthetic dye Reactive Black 5 (RB5) using the biological agent Aspergillus niger. The Treatment occurred in a 250 mL Erlenmeyer flask containing a mixture of dye solution. The preliminary research treatment involved varying dye concentrations, which were then analyzed by examining enzyme activity and fungal growth at different shaker rotations. The initial findings on concentration variation indicated that it was effectively removed up to approximately 90%. Further research determined that the highest concentration, 200 ppm, was used. The results obtained with rotation variations up to the sixth day were 95% for 100 rpm and 93% for 150 rpm. Dye removal utilizes laccase, lignin peroxidase (LiP), and manganese peroxidase (MnP) as degrading enzymes. The highest amount of enzyme activity was achieved at 100 rpm, corresponding to the most effective dye removal. The enzyme activity at the 100-rpm variation was observed for MnP (62.2 U/L), LiP (32.2 U/L), and laccase (16.6 U/L). The rapid growth of the Aspergillus niger fungus is associated with the biomass, which influences the biosorption mechanism. Biodegradation pathways indicate the cleavage of aromatic bonds, with toluene and propanoic acid identified as the final products.
Co-Authors EDWAN KARDENA Mustofa, Ikrom Nuurussyahba, Wahda Annisa