Main Article Content
The aim of this study was to evaluate the influence of retention time on the production of biogas from a blend of cow dung and water hyacinth. The study was designed to include three production trials. These were the Cow dung Production Trial (CPT), Water Hyacinth Production Trial (WPT) and Cow dung-Water hyacinth Production Trial (CWPT). For the CPT, 0.5 kg of cow dung was dissolved in 7 litres of water to form slurry which was sieved before being introduced into the digester alone, while for the WPT, chopped water hyacinth was introduced into the digester alone and for the CWPT, cow dung slurry alongside chopped water hyacinth was introduced into the digester. The three production trials were performed at the temperature of 35ºC and pH of 6.8 and lasted for 40 days in ranges of 0-10, 11-20, 21-30 and 31-40. Results obtained from the study showed a uniform trend in the production of biogas for the three different production trials. Highest level of biogas production was recorded at day 11-21 thus, CPT (53.7 ml), WPT (35.67 ml) and CWBPT (89.37 ml). This was followed the values recorded on day 31-40 as follows; CPT (38.1 ml), WPT (22.1 ml) and CWBPT (60.02 ml). However, this was elevated compared to the values obtained for day 0-10. In conclusion, this study has established that biogas production from cow dung, water hyacinth as well as their combination is most efficiently achieved between 11th-21st day of production.
Sulaimon AY. Energy sector is critical to Nigeria growth and development: Perspective to electricity sub-sector in Nigeria. MPRA Paper No. 55689; 2014.
Wolde R. Energy demand and economic growth: African experience. J Policy Modeling. 2005;27:89–903.
Adekomaya O, Adama K, Okubanjo A. Bridging environmental impact of fossil fuel energy: The contributing role of alternative energy. JESR. 2018;23(2):22-27.
Kaygusuz K. Türker MF. Biomass energy potential in Turkey, Renewable Energy, Elsevier. 2002;26(4):661-67825.
Maishanu SM, Musa M, Sambo AS. Biogas technology: The output of the Sokoto energy research centre. Niger. J. Solar Energy. 1990;9(1):83-194.
Wilson JR, Holst N, Rees M. Determinants and patterns of population growth in water hyacinth. Aqua. Bot. 2005;81:51-67.
Patel S. Threats, management and envisaged utilizations of aquatic weed Eichhornia crassipes: An overview. Rev. Environ. Sci. Biotechnol.2012;11:249-259.
Yadvika TS, Kohl RS, Rana V. Bioresour Technol. 2004;95:1-10.
Anna S, Åsa J. Microbiological handbook for biogas plants. Swedish Waste Management. U2009:03 Swedish Gas Centre Report 207; 2009.
Ezekoye VA, Ezekoye BA, Offor PO. Effect of retention time on biogas production from poultry droppings and cassava peels. Nig J. Biotech. 2011;22:53-59.
Umeghalu C, Chukwuma E, Okonkwo I, Umeh S. Potentials for biogas production in Anambra State of Nigeria using cow dung and poultry droppings. IJVS. 2012;1: 26-30.