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All Journal Advance Sustainable Science, Engineering and Technology (ASSET) Journal of Environmental and Science Education
Putri Alifa Kholil
Universitas Negeri Semarang
Chemistry Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Other

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Exploring Biochar Briquettes from Biomass Waste for Sustainable Energy Andhina Putri Heriyanti; Sitty Nur Syafa Bakri; Abdul Jabbar; Putri Alifa Kholil; Rizki Nor Amelia; Erna Noor Savitri; Rifaatunnisa; Siti Herlina Dewi; Habil Sultan
Advance Sustainable Science Engineering and Technology Vol. 7 No. 3 (2025): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i3.1311

Abstract

The increasing demand for renewable energy necessitates sustainable alternatives such as biochar briquettes derived from agricultural waste. This study aims to optimize the production process and evaluate the physical, mechanical, and combustion properties of biochar briquettes made from corn residues, rice husks, and coconut shells. The methodology includes biomass carbonization, binder ratio optimization, and systematic testing of key quality parameters such as moisture content, density, ash content, and calorific value. Results indicate that an optimal biomass-to-binder ratio yields a high calorific value (7,192 kcal/kg) and low ash content (3.57%), enhancing combustion efficiency. Maintaining moisture content below 10% enhances ignition and prolongs burning time. These findings highlight biochar briquettes' role in carbon sequestration, biomass conversion, and sustainable waste management, supporting the circular economy and reducing environmental pollution. Biochar briquettes offer a clean, accessible energy solution, contributing to global energy security and climate change mitigation.
The Role of Diponegoro Park Green Open Space in Semarang City in Providing Oxygen, Carbon Absorption, Reducing Temperature, and Humidity, a Case Study of Economic Valuation Abi Manshurin; Amnan Haris; Adibatus Syarafi; Audilla Nursendi; Johan Ega Saputra; Abdul Jabbar; Trida Ridho Faris; Putri Alifa Kholil; Ahmad Faza Al-Husna
Journal of Environmental and Science Education Vol. 6 No. 2 (2026): Journal of Environmental and Science Education: September 2026
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jese.v6i2.42480

Abstract

This study aims to assess the ecological role and economic value of Green Open Space (GOS) in Diponegoro Park, Semarang City, in supporting climate change mitigation. The method used is descriptive quantitative with measurements of biomass, carbon stock, CO₂ absorption, and oxygen production in various tree species, as well as the conversion of ecosystem results to economic value. The results show that Munggur trees have the most dominant contribution with an average biomass of 6,872.45, annual growth (ΔB) of 137.45, oxygen production of 183.29, carbon stock of 3,436.22, and CO₂ absorption of 12,610.94. The economic value of oxygen produced reached Rp1,832,881.93, emphasizing the importance of high-biomass vegetation in maintaining air quality and reducing carbon emissions. This study recommends the maintenance and planting of high-biomass trees to optimize the ecological function of GOS in urban areas.
Co-Authors Abdul Jabbar Abi Manshurin Adibatus Syarafi Ahmad Faza Al-Husna Amnan Haris Audilla Nursendi Erna Noor Savitri, Erna Noor Habil Sultan Heriyanti, Andhina Putri Johan Ega Saputra Rifaatunnisa Rizki Nor Amelia Siti Herlina Dewi Sitty Nur Syafa Bakri Trida Ridho Faris