Enhancement of Pretreatment Feasibility of Lignocellulosic Substrates for Biogas Production with Alkaline Lake Water
Öz
To improve the biogas efficiency from lignocellulosic feedstock, an alkaline pretreatment method was investigated based on the sustainable use of a natural resource. A new aspect of this study is the use of water from Lake Van (Lake Van Water, LVW), the world's largest alkaline lake with a surface area of 3,755 km2, located in an agricultural area, instead of alkaline solutions made with chemicals in laboratories. Wheat straw is the main cultivated waste as lignocellulosic feedstock and was also selected for this experiment. The alkaline pretreatment was carried out on a pulverised straw (2 cm max) with the LVW and alkaline water (NaOH solution). The experimental pretreatments were carried out for 120 h at a temperature of 37 °C in a climate-controlled room. Batch tests for anaerobic digestion were conducted for 60 days under mesophilic conditions (37 °C) to assess biochemical methane potentials. The methane yield of both types of pretreated wheat straw gave higher values than untreated wheat straw. It was also indicated that the WS pretreated with the LVW had a higher methane yield than the WS pretreated with the NaOH solution. In this study, an economic feasibility evaluation was also conducted. The LVW was determined to be a better economic alternative to NaOH for the pretreatment of wheat straw, a model lignocellulosic biogas substrate.
Anahtar Kelimeler
Alkaline pretreatment, Biomethane yield, Lake Van, Wheat straw
Teşekkür
Authors would like to thank to Fethi ÖZDEMİR (the manager of Adabağ Farm) for supplying inoculation seed and information about the farm; to Tayfun Manto for his help on construction costs; To Erbil Özdemir for his help for illustrations. The authors declare that no funds, grants, or other support were received during the preparation of this manuscript. This project was financed by personal means of authors (Ozan K. Bekmezci and Hülya Durmaz). All experiments and chemical analysis were performed at the laboratory of the Environmental Engineering Department of Bitlis Eren University.
Author Contributions (CRediT)
Ozan K. Bekmezci: Lead author, conceptualization, data curation, formal analysis, funding acquisition, investigation, methodology, project administration, resources, supervision, visualization, writing – original draft, writing – review & editing.
Zehra Sapci: Conceptualization, methodology, data curation, validation, writing – original draft, writing – review & editing.
Ezgi Piro: Investigation, visualization.
Hülya Durmaz: Funding acquisition, resources, supervision, writing – review & editing.
Kaynakça
- APHA. (1999). Standard Methods for Examination of Water and Wastewater. In American Public Health Association, American Water Works Association and Water Environmental Federation: Washington, DC, USA. American Public Health Association, American Water Works Association and Water Environmental Federation.
- Appels, L., Baeyens, J., Degrève, J., & Dewil, R. (2008). Principles and potential of the anaerobic digestion of waste-activated sludge. Progress in Energy and Combustion Science, 34(6), 755-781. https://doi.org/10.1016/J.PECS.2008.06.002
- Archana, K., Visckram, A. S., Kumar, P. S., Manikandan, S., Saravanan, A., & Natrayan, L. (2024). A review on recent technological breakthroughs in anaerobic digestion of organic biowaste for biogas generation: Challenges towards sustainable development goals. Fuel, 358, 130298. https://doi.org/10.1016/j.fuel.2023.130298
- Asghar, U., Irfan, M., Iram, M., Huma, Z., Nelofer, R., Nadeem, M., & Syed, Q. (2015). Effect of alkaline pretreatment on delignification of wheat straw. Natural Product Research, 29(2), 125–131. https://doi.org/10.1080/14786419.2014.964712
- Bekmezci, O. K., Sapci-Ayas, Z., & Ucar, D. (2021). Novel gas measurement based on pressure triggered release cycles for biochemical methane potential tests. International Journal of Chemical Reactor Engineering, 19(6), 585–596. https://doi.org/10.1515/ijcre-2020-0244
- Bertasini, D., Battista, F., Mancini, R., Frison, N., & Bolzonella, D. (2024). Hydrogen and methane production through two stage anaerobic digestion of straw residues. Environmental Research, 247, 118101. https://doi.org/10.1016/j.envres.2024.118101
- Chandra, R., Takeuchi, H., Hasegawa, T., & Kumar, R. (2012). Improving biodegradability and biogas production of wheat straw substrates using sodium hydroxide and hydrothermal pretreatments. Energy, 43(1), 273–282. https://doi.org/10.1016/j.energy.2012.04.029
- Cheng, X., Huang, Z., Wang, Z., Ma, C., & Chen, S. (2019). A novel on-site wheat straw pretreatment method: Enclosed torrefaction. Bioresource Technology, 281, 48–55. https://doi.org/10.1016/j.biortech.2019.02.075
- Estevez, M. M., Linjordet, R., & Morken, J. (2012). Effects of steam explosion and co-digestion in the methane production from Salix by mesophilic batch assays. Bioresource Technology, 104, 749–756. https://doi.org/10.1016/j.biortech.2011.11.017
- Felföldi, T., Somogyi, B., Márialigeti, K., & Vörös, L. (2009). Characterization of photoautotrophic picoplankton assemblages in turbid, alkaline lakes of the Carpathian Basin (Central Europe). Journal of Limnology, 68(2), 385. https://doi.org/10.4081/jlimnol.2009.385