| Food waste valorization by co-digestion for biogas production and carbon emission reduction: Role of VFA and SCOD Anwar Ahmad1; 1UNIVERSITY OF NIZWA, Nizwa, Oman; PAPER: 46/Recycling/Regular (Oral) SCHEDULED: 12:20/Mon. 28 Nov. 2022/Arcadia 2 ABSTRACT: <p>The demand for the reduction of food waste in Oman has been increased during recent years. The rapid development of economic growth is throwing impact on the work-of-art of the solid waste. Food waste is generated from residential, industrial, commercial, and institutional sectors. Due to growing population and increasing consumption, the amount of solid waste is increasing. In arid region of Oman, solid waste generation was 19,100 ton/d in 2005. Generation of solid waste is expected to reach 30,000 tons/d in 2020. The high food waste content in MSW leads to its separation for use in anaerobic treatment in the available highest sources of VFA 2.89 g/l and SCOD 1980 mg/l. Biogas and methane yield were recorded to a maximum of 1.364 l/g-CODremoved.d (r=0.87), 0.912 L/g-CODremoved.d (r=0.99) and average methane content of biogas was 69%. The reactor was fully acclimatized at 55oC and achieved stability with high removal efficiency of COD, biogas production and emission reduction of CO2 of 89%. Thus, at 55oC temperature and OLR of 12.5 g-COD/L.d with 8 d HRT support a maximum biogas production of 1.37 L/g-CODremoved.d.</p> References: <p>1. Ngoc, U.N., Schnitzer, H. (2009). Sustainable solution for solid waste management in Southeast Asian countries, J. Waste Manage., 29, 1982-1995. 2. Black, D.R. (1994). Methane role in atmospheric change, SWANA’S 17th annual international landfill gas symposium. Long Beach CA. 3. Calander, B. (1995). Scientific aspects of the framework conversion on climate change and national greenhouse gas inventories, Environ. Monitoring and Assessment, 28, 129-140. 4. Ishigaki, T., Yamada, M., Nagamori, M., Ono, Y, Inoue, Y. (2005). Estimation of methane emission from whole waste landfill site using correlation between flux and ground temperature, Environ. Geol., 48, 845-853. 5. Ministry of energy, waster and communications. (2004). Malaysia energy center, Study on clean development mechanism potentional in the waste sectors in Malaysia, Final report on renewable energy and energy efficiency component (subcomponent III: CDM action plan). 6. Kamarudin, W.N.B. (2008). The CDM/sustainable energy market in Malaysia, Malaysian energy center, Kuala Lampur, Malaysia. 7. El-Fadel, M., Masoud, M. (2001). Methane emissions from wastewater management, Environ. Poll., 114, 177-185. 8. Christophersen, M., Kjeldsen, P., Holts, H., Chanton, J. (2001). Lateral gas transport in soil adjacent to an old landfill: Factors governing emissions and methane oxidation, Waste Manage. Res., 19, 126-143. 9. Abushammala, M.F.M., Basri, N.E.A., Kadhum, A.A.H. (2009a). Review on landfill gas emission to the atmosphere, Eur. J. Sci. Res., 30, 427-436. 10. Sawayama, S., Inoue, S., Minowa, T., Tsukahara, K., Ogi, T. (1997). Thermochemical liquidization and anaerobic treatment of kitchen garbage, J. Ferment. Bioeng., 83, 451-455. 11. Alper, T.A., Orham, I., Nilgun, A.O., Betul, K., Bahar, K.I. (2005). Evaluation of performance, acetoclastic methanogenic activity and archaeal composition of full-scale UASB reactors treating alcohol distillery wastewaters. Process Biochem., 40, 1251-1259. 12. Tsukahara, K., Yagishita, T., Ogi, T., Sawayama, S. (1999). Treatment of Liquid Fraction Separated from Liquidized Food Waste in an Upflow Anaerobic Sludge Blanket Reactor, J. Biosci. and Bioeng., 87, 554-556. 13. Farhan, E.l., Shieh, M. (1999). Overloading responses of a glucosefed anaerobic fluidized bed reactor. J. Biochem. Eng., 3, 17–23. 14. Choorit, W., Wisarnwan, P. (2007). Effect of temperature on the anaerobic digestion of palm oil mill effluent, Electr. J. Biotech., 10, 376-385.</p> |
