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All Journal International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis CARADDE: Jurnal Pengabdian Kepada Masyarakat Abdimasku : Jurnal Pengabdian Masyarakat Automotive Experiences Aptekmas : Jurnal Pengabdian Kepada Masyarakat International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
Kusmiyati Kusmiyati
Department Of Industrial Engineering, Faculty Of Engineering, Dian Nuswantoro University
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Journal : International Journal of Renewable Energy Development

 1 
Preliminary Observation of Biogas Production from a Mixture of Cattle Manure and Bagasse Residue in Different Composition Variations H Hadiyanto; Figa Muhammad Octafalahanda; Jihan Nabila; Andono Kusuma Jati; Marcelinus Christwardana; Kusmiyati Kusmiyati; Adian Khoironi
International Journal of Renewable Energy Development Vol 12, No 2 (2023): March 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.52446

Abstract

The need of renewable energy is paramount important as it is expected to replace fossil energy. One of renewable energy commonly used for rural area is biomass-based energy. Biogas is a biomass-based energy where organic materials are converted to methane gas via anaerobic digestion process. The limitations of mono-feedstock biogas are instability digestion process, low yield biogas produced and require readjusting C/N ratio, therefore co-digestion process was proposed to overcome these problems. This study aims to investigate the feasibility of anaerobic co-digestion of a mixture of cattle manure and bagasse residue in different weight ratio combinations. Biogas was generated by anaerobic digestion using a mixed substrate composed of a combination of weight ratios of bagasse:cattle manure (1:5, 1:2, 1:1, and 3:1). The kinetic analysis was evaluated by fitting Gompertz and Logistic model to experimental data of cumulative biogas. The result showed that the combination of 1:5 ratio of bagasse waste to cattle manure obtained the best biogas yield with cumulative biogas at 31,000 mL. The kinetic model of Gompertz and Logistic were able to predict the maximum cumulative biogas at ratio of 1:5 (cattle: bagasse) at 31,157.66 mL and 30,112.12 mL, respectively. The other predictions of kinetic parameters were maximum biogas production rate (Rm)= 1,720.45 mL/day and 1,652.31 mL/day for Gompertz and Logistic model, respectively. Lag periods were obtained at 2.403 day and 2.612 day for Gompertz and Logistic model, respectively. The potential power generation of 338.71 Watt has been estimated from biogas. This research has proven a positive feasibility of co-digestion of two feed-stocks (cattle manure and bagasse) for biogas production.
Preparation of MgO-CaO/SiO2 catalyst from dolomite and geothermal solid waste for biodiesel production Widayat Widayat; Nadia Taradissa Maheswari; Wahyu Fitriani; Luqman Buchori; Hantoro Satriadi; K Kusmiyati; Norzita Ngadi
International Journal of Renewable Energy Development Vol 12, No 3 (2023): May 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.51573

Abstract

Energy demand will increase along with the increase in population. The current energy demand is dominated by non-renewable energy as it could reduce dependence on fossil energy sources; hence, it is imperative to be developed. Biodiesel with waste cooking oil as its raw material is one of the renewable energies currently being developed. Catalyst can be utilized to improve the quality of biodiesel product and process. The major content in solid waste of geothermal power plant is silica oxide, while dolomite contains magnesium oxide and calcium oxide. This study aims to test the MgO-CaO/SiO2 catalyst performance from geothermal waste and dolomite in biodiesel production. The results of catalyst characterization based on FTIR, SEM, and BET tests indicates a successful impregnation method in MgO-CaO/SiO2 catalyst production. The result shows that the best variable to produce biodiesel is at the ratio of MgO-CaO: SiO2 is 15:85. The conversion of biodiesel using this variable is 92.63%. The overall results of biodiesel obtained in this study have a good quality and is in accordance with SNI 7182-2015.
Co-Authors Abu Salam Achmad Roesyadi Adian Khoironi Agnes Heratri Andono Kusuma Jati Apsari Puspita Aini Arief Budiman Dewa Kusuma Wijaya Diah Ayu Esti Widya Astuti Figa Muhammad Octafalahanda H Hadiyanto H Hadiyanto Hantoro Satriadi Herwin Suprijono Jihan Nabila Juli Ratnawati Luqman Buchori Marcelinus Christwardana Nadia Taradissa Maheswari Norzita Ngadi Nur Hidayati Reistu Widiastutik Rizca Aulyana Sabda Wahyu Nugroho Sakina Tunissa Anarki Wahyu Fitriani Widayat Widayat Widayat Widayat