A MODIFIED DIGESTER PROTOTYPE TO PRODUCE BIOGAS FROM SOME AGRICULTURAL WASTES AS A RENEWABLE ENERGY RESOURCE
SAMIR ADEEB DEMETRY;
Abstract
The target of this research is designing, fabricating and testing a portable digester, as a method to produce safe and cheap energy, from agricultural wastes namely Water hyacinth (WH) and cow manure (CM).
By increasing the fossil fuels demand and its depletion, in addition to its price rising, so the world searches for another method to getting the energy, which must be safe and cheap. Renewable energy sources include biomass, geothermal energy, hydropower, solar energy, and wind energy. They are called renewable energy sources because they are replenished in a short time. The production and utilization of renewable energy sources are justified not only by energy, political, environmental and competitive aspects, but by rural development aspects as well.
On other hand there are millions of tons of biomass waste being produced every year for which disposal is a problem. These wastes have a great potential for biogas production owing to its organic composition.
Sources of wastes can be broadly classified into four types, Industrial, Commercial, Domestic, and Agricultural wastes. Commonly waste is classified into two types, Biodegradable and Non-biodegradable waste. In general, all types of biomass can be used as substrates as long as they contain carbohydrates, proteins, fats, cellulose and hemicellulose as main components for producing biogas. The choice of a substrate depends on availability, its cost, ease of handling, safety for operators, storage and requirements for feeding.
Anaerobic digestion is “a process of controlled decomposition of biodegradable materials under managed conditions where free oxygen is absent, at temperatures suitable for naturally occurring”. The process of anaerobic digestion (AD) employs specialized facultative bacteria to break down organic waste, converting it into biogas and into a stable biomass (digestate). Anaerobic digestion completed at stages, Hydrolysis, Acidogenesis, Acetogenesis and Methanogenesis. The products of fermentation process are biogas and digestate. Biogas is a mixture of carbon dioxide and methane and traces of other gases. There are many factors affecting rate of Digestion and Biogas production like pH, temperature, sublayer materials, C/N ratio, agitation, inhibitors and pretreatment. Carbon and nitrogen are the main nutrients for anaerobic bacteria. While carbon supplies energy, nitrogen is needed for building up the cell structure.
By increasing the fossil fuels demand and its depletion, in addition to its price rising, so the world searches for another method to getting the energy, which must be safe and cheap. Renewable energy sources include biomass, geothermal energy, hydropower, solar energy, and wind energy. They are called renewable energy sources because they are replenished in a short time. The production and utilization of renewable energy sources are justified not only by energy, political, environmental and competitive aspects, but by rural development aspects as well.
On other hand there are millions of tons of biomass waste being produced every year for which disposal is a problem. These wastes have a great potential for biogas production owing to its organic composition.
Sources of wastes can be broadly classified into four types, Industrial, Commercial, Domestic, and Agricultural wastes. Commonly waste is classified into two types, Biodegradable and Non-biodegradable waste. In general, all types of biomass can be used as substrates as long as they contain carbohydrates, proteins, fats, cellulose and hemicellulose as main components for producing biogas. The choice of a substrate depends on availability, its cost, ease of handling, safety for operators, storage and requirements for feeding.
Anaerobic digestion is “a process of controlled decomposition of biodegradable materials under managed conditions where free oxygen is absent, at temperatures suitable for naturally occurring”. The process of anaerobic digestion (AD) employs specialized facultative bacteria to break down organic waste, converting it into biogas and into a stable biomass (digestate). Anaerobic digestion completed at stages, Hydrolysis, Acidogenesis, Acetogenesis and Methanogenesis. The products of fermentation process are biogas and digestate. Biogas is a mixture of carbon dioxide and methane and traces of other gases. There are many factors affecting rate of Digestion and Biogas production like pH, temperature, sublayer materials, C/N ratio, agitation, inhibitors and pretreatment. Carbon and nitrogen are the main nutrients for anaerobic bacteria. While carbon supplies energy, nitrogen is needed for building up the cell structure.
Other data
| Title | A MODIFIED DIGESTER PROTOTYPE TO PRODUCE BIOGAS FROM SOME AGRICULTURAL WASTES AS A RENEWABLE ENERGY RESOURCE | Other Titles | نموذج معدل لمخمر لإنتاج الغاز الحيوي من بعض المخلفات الزراعية كمورد للطاقة المتجددة | Authors | SAMIR ADEEB DEMETRY | Issue Date | 2020 |
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