Co-digestion of Food Waste and Human Excreta for Biogas Production
Journal Title: Biotechnology Journal International - Year 2013, Vol 3, Issue 4
Abstract
The ever increasing cost of fossil fuels and its attendant pollution menace has provided the pedigree to consider alternative sources of energy. An investigation was launched into the design and construction of an Anaerobic Digester system from locally available raw materials using local technology and the production of biogas from food wastes and Human excreta generated within a University campus. The experiment lasted for 60 days using a 40-liters laboratory scale anaerobic digester. The volume of gas generated from the mixture was 84,750cm3 and comprised of 58% CH4, 24% CO2, and 19% H2S and other impurities. The physico-chemistry of the feedstock in the digester revealed an initial drop in pH to more acidic range and a steady increase 4.52 – 6.10. The temperature remained relatively constant at mesophilic range: 22.0ºC– 30.5ºC throughout the study. The Carbon/Nitrogen (C/N) ratio of the feedstock before digestion was within 139:1. Population distributions of the microflora show aerobic and anaerobic bacteria to include Klebsiella spp, Bacillus spp, Escherichia coli, Clostridium spp and a methanogen of the genera Methanococcus. In most developing nations of Sub-Saharan Africa where biomass is abundant, and where biogas technology is in its infant stage, the anaerobic digestion system could be the much awaited solution.
Authors and Affiliations
S. O. Dahunsi, U. S. Oranusi
Keywords
Related Articles
- EP ID EP237135
- DOI 10.9734/BBJ/2013/4476
- Views 173
- Downloads 0
In vitro and in silico Approach to Evaluate the Urease and Collagenase Inhibitory Activity of Embilica officinalis Gaertn Fruit
Aim: The key virulent factors of bacteria are enzymes. Urease and collagenase enzyme play a vital role in pathogenesis of wide array of bacterial strains and cause numerous diseases. So the aim of present study was to fi...
In vitro Propagation of Oxytenanthera abyssinica (A. Rich. Munro) from Seed Culture
Introduction: In Ethiopia, O. abyssinica has varies economic importance. However, conventional propagation methods of O. abyssinica are generally inefficient due to their low multiplication rate, time consuming, labor in...
Preparation of Protein Extraction from Flower Buds of Solanum lycopersicum for Two-Dimensional Gel Electrophoresis
Aims: Find a suitable method for the protein extraction from flower buds of Solanum lycopersicum. Study Design: Compare some kinds of protein extraction methods and find the best one among them suitable to tomato flower...
Genetic Variability in Cultured and Wild Population of Clarias gariepinus Using Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis (SDS-PAGE)
Aim: The present study was undertaken to determine the genetic differences between cultured and wild populations of Clarias gariepinus in Southwest Nigeria using Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis...
Physico-chemical Attributes of Meat from Broiler Chickens Fed Pelletised Cassava Chips-Based Diets Supplemented with Graded Levels of Crystalline DL-Methionine
Aims: This experiment was carried out to investigate the effect of cassava chips-based diets with methionine supplementation on performance and meat physico-chemical attributes of broiler chickens. Methodology: 400 one-...