Utilization of Onion Solid Waste as Feedstock for Biogas Production
Keywords:onion waste, biogas, pretreatment conditions, biogas yield
Utilization of onion solid wastes such as onion leaves and unmarketable onion bulbs as potential feedstock for biogas production was investigated. Response surface methodology (RSM) was used to optimize the interactive effects of temperature, lime concentration and reaction time for the maximum biogas and methane yield, and biodegradation.
Results showed that the optimum pretreatment conditions established for red creole bulb are:Â lime concentration of 4%, temperature of 118oC and reaction time of 5 hours; yellow granex bulb â€“ lime concentration of 6.5%, temperature of 102oC and reaction time of 2 hours; red creole leaves â€“ lime concentration of 12%, temperature of 118oC and reaction time of 6 hours; and yellow granex leaves â€“ lime concentration of 12%, temperature of 118oC and reaction time of 5 hours. Red creole bulb produces the highest biogas yield (373.4 ml/g VS and 60.3% CH4), followed by yellow granex leaves (366.6 ml/g VS and 58.5% CH4), red creole leaves (331ml/g VS and 59.6% CH4) and yellow granex bulb (350ml/g VS and 60.7% CH4). The regression equation established for biogas yield was found to be adequate for the prediction of independent variables applied. Moreover, the highest and lowest biodegradability of 59.1% and 39% were obtained for Red creole bulb and leaves, respectively. Onion bulb wastes containing easily-degradable substrates had relatively higher methane production potential and biodegradability than onion leaves which have more fiber content.Â
â€¢ American Society of Agricultural Engineers. (1982). Standard: ASAE S352.1. Moisture measurement-Grains and seeds.
â€¢ Angelidaki I. et. al. (2009). Defining the biomethane potential (BMP) of solid organic wastes and energy crops: a proposed protocol for batch assays. Water Sci. Technol. 59(5): 927-934.
â€¢ APHA (1998). Standard methods for the examination of water and wastewater, 20th ed. American Public Health Association, American water works association water pollution control federation, Washinfton, DC.
â€¢ Brown K.A., David M.H. (1994). Using landfill gas: a UK perspective. Renew. Energ., 5: 774â€“781.
â€¢ Bureau of Agricultural Statistics. (2015). BAS Online Statistics Database. (http://bas.gov.ph).
â€¢ Calica G.B., Bareng R.P., Maranan C.L., Rapusas R.S. (1999). Benchmark study on the postharvest technology on onion and garlic. Terminal Report.
â€¢ Calvert J.G. (1990). Glossary of atmospheric chemistry terms. Pure and Applied Chemistry. Vol.62, 2217.
â€¢ Chen S., Frear C., Zhao B.C., Fu G. (2003). Bioenergy inventory and assessment for Easter Washington. Biosystems Engineering, WSU
â€¢ Department of Agriculture â€“ Bureau of Postharvest Research and Extension (DA-BPRE), University of the Philippines â€“ Postharvest and Seed Sciences Division (UPLB â€“ PSSD). (2009). Qualitative and quantitative loss assessment of selected high value food crops. A case study: Loss assessment for onion. Terminal Report.
â€¢ Elbeshbishy E. et.al. (2012). Biochemical methane potential (BMP) of food waste and primary sludge: influence of inoculum pre-incubation ad inoculum source. Bioresource Technology. 101, 4021-4028.
â€¢ Hart J.R., Feinstein L. Golumbic C. (1959). Oven methods for precise measurement of moisture content of seeds. Marketing Research Report No. 304 (USDA-AMS), US Government Printing Otlice, Washington, D.C.
â€¢ Hansen T.L. et. al. (2004). Method for determination of methane potentials of solid organic waste. Waste Management. 24, 393-400.
â€¢ Kapdi S.S., Vijay V.K., Rajesh S.K., Prasad R. (2005). Renewable Energy (30), 1195â€“1202.
â€¢ Karr W.E., Holtzapple T. (2000). Using lime pretreatment to facilitate the enzymatic hydrolysis of corn stover. Biomass Bioenergy 18, 189â€“199.
â€¢ Lee D.H. et. al. (2009). Methane production potential of leachate generated from Korean food waste recycling facilities: a lab scale study. Waste Manage. 29, 876â€“882.
â€¢ Li Y., Zhang R., Liu G., Chen C., He Y., Liu X. (2013). Comparison of methane production potential, biodegradability, and kinetics of different organic substrates. Bioresource Tech.
â€¢ Mata-Alvarez J., Mace S. and Liabres P. (2000). Anaerobic digestion of organic solid wastes. An overview of research achievements and perspectives. Bioresource Technol., 74: 3â€“16.
â€¢ Salem Z., Hamouri K., Djemaa R., Allia K. (2008). Evaluation of landfill leachate pollution and treatment. Desalination, 220: 108â€“114.
â€¢ Welbaum G.E. (2015). Vegetable Production and Practices. Wallingforth, Oxfordshire, UK: CAB International. Books.google.com.ph. CAB International.
How to Cite
- Papers must be submitted on the understanding that they have not been published elsewhere (except in the form of an abstract or as part of a published lecture, review, or thesis) and are not currently under consideration by another journal published by any other publisher.
- It is also the authors responsibility to ensure that the articles emanating from a particular source are submitted with the necessary approval.
- The authors warrant that the paper is original and that he/she is the author of the paper, except for material that is clearly identified as to its original source, with permission notices from the copyright owners where required.
- The authors ensure that all the references carefully and they are accurate in the text as well as in the list of references (and vice versa).
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Attribution-NonCommercial 4.0 International that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
- The journal/publisher is not responsible for subsequent uses of the work. It is the author's responsibility to bring an infringement action if so desired by the author.