Erscheinungsdatum: 05/2012, Medium: Taschenbuch, Einband: Kartoniert / Broschiert, Titel: Biogas Made Easy, Titelzusatz: Designing a Digester and the Effects of Kinetic Parameters on the Production of Biogas, Autor: Abdullahi, Ibrahim // Isma'ila, Aminu, Verlag: LAP Lambert Academic Publishing, Sprache: Englisch, Rubrik: Physik // Astronomie, Sonstiges, Seiten: 84, Informationen: Paperback, Gewicht: 142 gr, Verkäufer: averdo
Consumer Preferences to Adopt Domestic Biogas Digester Technology ab 76.99 € als Taschenbuch: . Aus dem Bereich: Bücher, Wissenschaft, Technik,
Anaerobic Digestion is a series of chemical reactions during which organic material is decomposed through the metabolic pathways of naturally occurring microorganisms in an oxygen-depleted environment.In nature this type of breakdown typically occurs in warm wet and dark environments, such as in the digestive tracts. The microorganisms are exploited in the biotechnological process of anaerobic digestion both to reduce the pollution caused by organic wastes and to produce methane, which can be used as a fuel. The number and types of microorganisms present in digesters are likely to depend upon the type of digester, its operating conditions and the waste composition. Anaerobic Digesters can be used on any carbon containing industrial wastewater i.e. food processing, pulp and paper, sugar and distillery, slaughterhouse, cheese whey and diary units, brewing industry and municipal sludge. Also, they provide an effective method for turning residues from different wastes, biogas (rich in methane which can be used to generate heat and/or electricity), fiber (this can be used as a nutrient-rich soil conditioner) and liquor (this can be used as liquid fertilize).
In Palestine, there are huge natural possibilities in the field of bio-energy, which greatly reduces dependence on imports. In the field of bio-energy, there are huge amounts of solid waste produced by municipalities, which spend large sums of money to bury them in waste dumps, which are deficient and inadequate to meet the needs, there is a large amount of waste oil used and polluting the environment. There are also large quantities of olive peats that pollute the environment. Investment in these fields produces large amounts of energy and protects the environment from severe damage. In addition, there are huge quantities of animal manure from goats, chickens and cows, which can generate energy. In any case, bio-energy processes lead to the production of natural fertilizers that are desirable to farmers because of their lack of odors. The amount of biogas that can be extracted from organic waste, depends on the waste itself and the design of the digester system, it ranges from 20 m3 per ton to 800 m3 of biogas per ton. Each cubic meter (m3) of biogas contains the equivalent of 6kWh of calorific energy.
Anaerobic codigestion of municipal wastewater sludge and restaurant grease was investigated in a semi-continuous lab-scale digestion experiment under mesophilic condition (37 °C). Compared to the control digester, COD loading rate for test digester was elevated to 387% (organic loading rate 4.235 kgVS/m3/d) and led to 467% increase in daily biogas production, 25.2% increase in methane yield (based on VS deduction), 29.8% increase in COD reduction rate and 27.2% increase in VS reduction rate, respectively. Methane content ranged from 62% to 67%. There was no negative effect of grease addition on the digester performance in this experiment. The great increases in biogas production and methane yield indicated enhanced digestion performance. In addition, partial alkalinity and pH proved to be good indicators to monitor digestion process and predict overloading. It is still possible to keep increasing organic loading by the addition of more grease, but according to monitoring results, the system was close to overloading.