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<p>Due to the rapid growth in agro-processing and wood- based industries, the biomass wastes including mixed wood sawdust, rice husk, and coffee husk are highly generated in Ethiopia. Improper disposal of these wastes negatively influences the environment, while their energy potential is still inadequate underutilized. The proximate analysis, ultimate analysis, Higher Heating Value (HHV), and Lower Heating Value (LHV) determinations of the biomass wastes are important in designing both the waste-to-energy conversion and waste management systems. The objective of this study was to investigate the bioenergy potential of three common biomass wastes- mixed wood mixed wood sawdust, rice husk, and coffee husk-in Ethiopia through comprehensive proximate and ultimate analyses, coupled with the assessments of their HHV and LHV. The HHV values for mixed wood sawdust, rice husk, and coffee husk were 17,421.45, 16,169.75, and 18,678.32 KJ/Kg, respectively. Likewise, the LHV values for mixed wood sawdust, rice husk, and coffee husk were 16,235.17, 15,115.51, and 17,384.38 KJ/Kg, respectively. Further determination of the moisture content (MC), volatile matter (VM), fixed carbon (FC), and ash content (AC) can provide a suitability of such materials for various thermochemical processes. Sulfur (S) content was zero in the sawdust, and the mass percentage of S in rice husk and coffee husk was just 0.09% and 0.05%, respectively. Thus, these biomasses do not have any effect on S oxidation. These properties therefore show that mixed wood sawdust, rice husk, and coffee husk are feasible for biofuel purposes, considering their properties; it is also an opportunity to improve waste management sustainability practices in a country like Ethiopia to contribute toward renewable energy production.</p>

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Characterization of selected agriculture biomass wastes for energy generation and enhanced waste management: a comparative study

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Fentahun Abebaw Belete,
  • Tesfay Negassi Gebresilasie,
  • Asmelash Gebrekidan Mekonen,
  • Kiros Fisseha Kahsay

摘要

Due to the rapid growth in agro-processing and wood- based industries, the biomass wastes including mixed wood sawdust, rice husk, and coffee husk are highly generated in Ethiopia. Improper disposal of these wastes negatively influences the environment, while their energy potential is still inadequate underutilized. The proximate analysis, ultimate analysis, Higher Heating Value (HHV), and Lower Heating Value (LHV) determinations of the biomass wastes are important in designing both the waste-to-energy conversion and waste management systems. The objective of this study was to investigate the bioenergy potential of three common biomass wastes- mixed wood mixed wood sawdust, rice husk, and coffee husk-in Ethiopia through comprehensive proximate and ultimate analyses, coupled with the assessments of their HHV and LHV. The HHV values for mixed wood sawdust, rice husk, and coffee husk were 17,421.45, 16,169.75, and 18,678.32 KJ/Kg, respectively. Likewise, the LHV values for mixed wood sawdust, rice husk, and coffee husk were 16,235.17, 15,115.51, and 17,384.38 KJ/Kg, respectively. Further determination of the moisture content (MC), volatile matter (VM), fixed carbon (FC), and ash content (AC) can provide a suitability of such materials for various thermochemical processes. Sulfur (S) content was zero in the sawdust, and the mass percentage of S in rice husk and coffee husk was just 0.09% and 0.05%, respectively. Thus, these biomasses do not have any effect on S oxidation. These properties therefore show that mixed wood sawdust, rice husk, and coffee husk are feasible for biofuel purposes, considering their properties; it is also an opportunity to improve waste management sustainability practices in a country like Ethiopia to contribute toward renewable energy production.