Tessema Belete, Gonfa Girma, Hailegiorgis Sintayehu Mekuria, Sundramurthy Venkatesa Prabhu
Department of Chemical Engineering, Addis Ababa Science and Technology University, 16417, Addis Ababa, Ethiopia.
Biotechnology and Bioprocess Center of Excellence, Addis Ababa Science and Technology University, 16417, Addis Ababa, Ethiopia.
Heliyon. 2023 Jun 17;9(6):e17422. doi: 10.1016/j.heliyon.2023.e17422. eCollection 2023 Jun.
Utilization of biomass is important both for economic and environmental projection purposes. To use biomass for industrial applications as well as to reduce its pollution load on environment, it is important to characterize and determine the compositions of the biomass. In this work, the proximate and chemical analyses of straws of four (Dagim, Filagot, Kora and Kuncho) Teff (Eragrostis tef) varieties were investigated with three replications. The thermographic and FTIR of the teff straws and the ashes were also studied. The volatile matter contents of the teff straws were 78.80, 77.00, 80.20 and 80.60% for the Dagim, Kuncho, Kora and Filagot varieties, respectively. The ash contents of the straws were 6.34% for Dagim, Kuncho and Kora while the value is 6.00% for Filagot. The fixed carbon contents of the straws were 14.86, 16.67, 13.47 and 13.40% for Dagim, Kuncho, Kora and Filagot varieties, respectively. The silica contents of the teff straw for the Filagot, Kora, Dagim, and Kuncho varieties are 5.92, 5.66, 4.94, and 4.70%, respectively. This corresponds to 92.21, 91.59, 77.19 and 87.20% silica contents in the ashes produced from Filagot, Kora, Dagim, and Kuncho varieties, respectively. The results show that the proximate and chemical composition of ash produced from teff straws show slight differences. Moreover, the silica content of the teff straw is comparable with the values reported for rice husk and wheat straw. Thus, teff straw can be used for the production of silica.
生物质的利用对于经济和环境预测目的都很重要。为了将生物质用于工业应用并减少其对环境的污染负荷，表征和确定生物质的成分很重要。在这项工作中，对四个（达吉姆、菲拉戈特、科拉和昆乔）画眉草（画眉草属）品种的秸秆进行了近似分析和化学分析，共三次重复。还研究了画眉草秸秆及其灰烬的热成像和傅里叶变换红外光谱。达吉姆、昆乔、科拉和菲拉戈特品种的画眉草秸秆挥发物含量分别为78.80%、77.00%、80.20%和80.60%。达吉姆、昆乔和科拉品种的秸秆灰分含量为6.34%，而菲拉戈特品种的该值为6.00%。达吉姆、昆乔、科拉和菲拉戈特品种的秸秆固定碳含量分别为14.86%、16.67%、13.47%和13.40%。菲拉戈特、科拉、达吉姆和昆乔品种的画眉草秸秆二氧化硅含量分别为5.92%、5.66%、4.94%和4.70%。这分别对应于菲拉戈特、科拉、达吉姆和昆乔品种产生的灰烬中92.21%、91.59%、77.19%和87.20%的二氧化硅含量。结果表明，画眉草秸秆产生的灰分的近似和化学成分存在细微差异。此外，画眉草秸秆的二氧化硅含量与稻壳和麦秸报道的值相当。因此，画眉草秸秆可用于二氧化硅的生产。
