Production of Biogas from Plantain Peels and Swine Droppings
IOSR Journal of Pharmacy and Biological Sciences
The current over dependence on non-renewable sources of energy such as fossil fuels calls for caution and rethink. This research deals with the production of biogas from plantain peels alone and plantain peels mixed with swine droppings using a 50L metal prototype bio-digester. The plantain peels was pre-decayed for 2 weeks before charging. They were charged as plantain peels alone (PP-A) and plantain peels mixed with swine droppings (PP-SD) into two separate digesters. The waste (PP-A and
... aste (PP-A and PP-SD) were subjected to anaerobic digestion for a period of 44days. The cumulative biogas yield for the plantain peels alone (PP-A) was 80.10dm 3 while that of plantain peels mixed with swine droppings (PP-SD) was 163.30m 3 . The PP-A commenced flammable gas production on the 2 nd day while, PP-SD commenced flammable gas production on the 30 th day. The PP-SD had the highest cumulative gas yield though with a slow onset of gas flammability. The overall result indicates that the low gas yield of PP-A could be significantly enhanced by blending it with swine droppings. Keywords: Biogas, swine droppings, fossil fuels and plantain peels alone. Collection of materials Plantain peels were collected from Nsukka market and allowed to decay for two weeks, while the swine droppings was collected from the Other materials Other materials used for this study include: metal prototype digesters of 50L capacity constructed at the National Center for Energy Research and Development, UNN. Weighing balance (50kg model no. Z051599) and WS graduated imperial and metric scales). It was sued through this study for weighing of waste and water. Thermometer (-10-110 0 C) was used for checking temperature of the waste, the slurry and for the ambient temperatures; Jenway digital pH meter (3510) was used to determine the pH of the slurries, graduated transparent plastic bucket (for measuring the volume of gas produced by down ward displacement of water) water trough, hosepipes for passage of gas and biogas burner fabricated locally for checking gas flammability. Sample preparation Two samples were involved in carrying out this research, one served as the control (plantain peels alone) and the other served as the experiment (plantain peels and swine droppings). Plantain peels alone (pp-alone) 14kg of plantain peels was weighed and soaked with 28kg of water in the ratio of 2: 1 of water to waste. The initial p H was 7.0. Plantain peels and swine droppings (pp -SD) 5kg of plantain peels and 5kg of swine droppings were weighed making a total of 10kg of the waste. This was mixed with 30kg of water in the ratio of 3:1 of water to waste at a P H of 7.0. Experimental set-up The plantain peels was charged alone and plantain peels mixed with swine droppings was charged separately. This set up was carried out on the 15 th of October, 2009 at the National Center for Energy Research and Development, UNN with a 50< capacity metallic prototype digester.