structure and function of biogas plant pdf
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structure and function of biogas plant pdf
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structure and function of biogas plant pdf
06-11-2017, 12:09 PM
The biogas plant has a vaulted structure built with bricks. A mixture of cow dung, vegetable waste, crop residues, etc. It is mixed with water and becomes a thick suspension and is fed to the digester. The digester is a sealed chamber in which there is no oxygen. Anaerobic microorganisms that do not require oxygen decompose or decompose complex compounds of cow manure to generate gases such as methane, hydrogen and hydrogen sulfide. The biogas is stored in the gas tank on the digester from which they are extracted through the pipes for use. The remaining grout is periodically removed and can be used as an excellent fertilizer rich in nitrogen and phosphorus.
The function of the biogas plant depends on physicochemical factors such as temperature and the nature of the raw material. Also include pretreatment, co-digestion for nutrient balance, mixing and hydraulic retention time (the days when the slurry remains in the digester before being ejected).
The higher temperature, higher the reaction rate and the production of biogas approximately 40 ° C is generally considered as the optimum temperature for the production of biogas, depending on the organic material. Some research has shown 37 to 45 oC as the optimum temperature for the maximum production of biogas. The pH ratio of (6.5 -7.2) Carbon to Nitrogen of 27 is generally considered as optimal values.
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