A Solid waste management company in Sultanate of Oman has decided to establish a bio energy...

A Solid waste management company in Sultanate of Oman has decided to establish a bio energy based system at Barka. As an engineer with good knowledge on energy, you are assigned with a task to study the feasibility of biogas production plant at that location. Suggest an efficient biogas generation plant with suitable biomass, type of biogas digester with a proposed diagram, their advantages and disadvantages. What would be your conclusion about this plant? Justify your answer.

Expert Solution

Please refer to the diagram for the biogas plant design

(i) Suitable biomass that can be used - agricultural/vegetable waste, animal waste (in the form of sludge) which is placed in the sludge digester

(ii) Type of biogas digester - Anaerobic digester

The dung water in the slurry gets mixed with the biomass/sludge in the digester. Methanogenic archae bacteria present in the dung water performs anaerobic fermentation of the wastes/biomass to produce biogas (major gases being methane and carbon dioxide).

Advantages:

(a) reduces water and soil pollution

(b) its a clean and renewable source of energy

(c) left out (unfermented) biomass can be used as fertilizers

Disadvantages:

(a) biogas so produced contains impurities

(b) the fermentation process is temperature dependent

(c) not suitable for large and densely populated cities

Conclusion:

The use of biogas plants to produce sustainable source of energy not only reduces pollution and cost, but also helps in drastic reduction of natural resources such as fossil fuels.

gladiator answered 2 years ago

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