Use of Biochar Produced from Elephant Grass by Pyrolysis in a Screw Reactor as a Soil Amendment
- 212 Downloads
This study was carried out to evaluate the agronomic potential of elephant grass biomass (Pennisetum purpureum Schum) biochar obtained through slow pyrolysis using a semi-continuous pilot screw reactor in the absence of a carrier gas, and under different conditions. The biomass was pyrolyzed with temperature ranging between 400 and 600 °C. The products (biogas/biochar/bio-oil) yields were evaluated. With increasing temperature, there was a decrease in biochar yield, however, the bio-oil yield was relatively constant. Different physicochemical properties of the biochar were evaluated, and the biochar was incubated in the soil for 60 days. After the incubation period the mixture of soil and biochar underwent analysis to determine soil fertility. The biochar produced presented an elevated content of micro and macronutrients, as well as high pH. Agronomic tests showed that biochar presented great potential to be used as an auxiliary liming agent, and as a fertilizer.
KeywordsBiochar Screw reactor Elephant grass Soil amendment
The authors would like to thank the financial support from the Coordination for the Improvement of Higher Education Personnel (CAPES – Brazil).
- 9.Chang, K.-L., Chen, X.-M., Sun, J., Liu, J., Sun, S., Yang, Z., Wang, Y.: Spent mushroom substrate biochar as a potential amendment in pig manure and rice straw composting processes. Environ. Technol. 3330, 1–5 (2016)Google Scholar
- 23.Van Soest, P.J., Wine, R.H.: Determination of lignin and cellulose in acid detergent fiber with permanganate. J. AOAC 51, 780–785 (1968)Google Scholar
- 25.Tedesco, M.J., Gianello, C., Bissani, C.A., Bonhen, H., Volkweiss, S.J.: Análises de solo, plantas e outros materiais. Boletim Técnico 5. Departamento de Solos, Porto Alegre (1995)Google Scholar
- 34.Lin, B.-J., Chen, W.-H.: Sugarcane bagasse pyrolysis in a carbon dioxide atmosphere with conventional and microwave-assisted heating. Front. Energy Res. 3, 1–9 (2015)Google Scholar
- 51.Melorose, J., Perroy, R., Careas, S.: Implementation of the global efficiency equipment in the machining sector. Statew. Agric. Land Use Baseline 1, 163–172 (2015)Google Scholar
- 53.Randolph, P., Bansode, R.R., Hassan, O.A., Rehrah, D., Ravella, R., Reddy, M.R., Watts, D.W., Novak, J.M., Ahmedna, M.: Effect of biochars produced from solid organic municipal waste on soil quality parameters. J. Environ. Manag. 192, 271–280 (2017). https://doi.org/10.1016/j.jenvman.2017.01.061 CrossRefGoogle Scholar