Claim Missing Document
Check
Articles

Found 2 Documents
Search

Bioethanol Production from Sugarcane Bagasse Using Neurospora intermedia in an Airlift Bioreactor Restiawaty, Elvi; Gani, Kindi Pyta; Dewi, Arinta; Arina, Linea Alfa; Kurniawati, Katarina Ika; Budhi, Yogi Wibisono; Akhmaloka, Akhmaloka
International Journal of Renewable Energy Development Vol 9, No 2 (2020): July 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.2.247-253

Abstract

Bagasse as solid waste in sugarcane industry can be utilized as one of the potential raw materials in the bioprocess industry. This research aims to investigate the conversion of bagasse to bioethanol using simultaneous saccharification and fermentation in an airlift bioreactor. Neurospora intermedia was used as a biological agent that carried out the saccharification and fermentation of sugarcane bagasse simultaneously for bioethanol production. Cell morphology of N. intermedia in the form of pellet was required to provide free movement in the axial flow of airlift bioreactor. The medium pH strongly affects the morphological shape of N. intermedia. Therefore, the formation of good pellets of inoculum was observed under acidic conditions, i.e. pH 3.0 – 3.5. The effect of the initial concentration of nutrient on the inoculum growth was also investigated. Inoculums cultured in potato dextrose broth (PDB) medium with a half the strength of the common nutrient concentration of PDB qualitatively indicated good growth in terms of the size and density of cells. The inoculums with good morphological form were fed into the airlift bioreactor, which already contained a liquid medium with initial pH of 3.5 and also contained pre-treated bagasse. In experiments using the airlift bioreactor, the pre-treated bagasse was added to various nutrient concentrations of the PDB infusion medium. The highest bioethanol production from bagasse was monitored in the medium culture of half strength PDB infusion. The yield of bioethanol obtained from total sugarcane bagasse and PDB in an air lift bioreactor achieved approximately 40%, which has an infusion medium with a half-strength PDB and initial pH of 3.0. 
Digital Learning and Teacher Motivation’s Impact on Student Satisfaction and School Competitive Advantage Dewi, Arinta; Sutjipto, Mohammad Riza
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 4 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i4.408

Abstract

In today's era of rapid educational transformation, the integration of digital technology in learning is a key factor in improving the quality of educational services. This is also the case at Putera Harapan Purwokerto 3 Language School (Puhua School) which also faces the challenge of maintaining and improving the quality of learning experiences where in the current era, students are increasingly demanding learning experiences that are adaptive, interesting and relevant to the needs of the times. This is important for the competitiveness of educational institutions in the current era. This study aims to analyze the effect of digital learning and teacher motivation on student satisfaction and its implications for the school's competitive advantage, with a case study at SMP-SMA 3 Bahasa Putera Harapan (Puhua School) Purwokerto. Various literatures reviewed and become the foundation of the framework in this study such as customer satisfaction theory, work motivation, as well as competitive advantage from Porter and two-factor theory show that effective digital learning can improve the quality of students' learning experience, especially if it is supported by high teacher motivation. Student satisfaction is positioned as a mediating variable that connects the influence of digital learning and teacher motivation on school competitiveness. The research method used is a quantitative approach with the SEM-PLS model, accompanied by qualitative validation through in-depth interviews. Data were collected from students and teachers using random sampling technique and analyzed using SmartPLS. The analysis technique used is path analysis to test the direct and indirect relationships between variables. The results show that digital learning and teacher motivation have a positive effect on student satisfaction. Student satisfaction is also proven to have a significant effect on the school's competitive advantage. In addition, student satisfaction mediates the relationship between digital learning and teacher motivation to competitive advantage. The simultaneous effect of the two independent variables also showed significant results in improving school competitiveness through student satisfaction. Data triangulation results show that both approaches are mutually reinforcing and consistent where all quantitative findings are qualitatively confirmed and no significant contradictions are found. In conclusion, the synergy between the implementation of digital technology and high teacher motivation is an important strategy in building student satisfaction and strengthening the school's competitive position. Schools are advised to continue developing digital learning systems and teacher motivation enhancement programs to meet future educational challenges.