Design and Building of Biogas Digester for Organic Materials Gained From Solid waste
By
Mansour-Al Sadi
Supervisor
Prof.Dr. Marwan Mahmoud
Term Definition
Anaerobic Digestion: (AD) the biological, physical and or chemical breakdown of animal manure in the absence of oxygen.
Biogas: the gas produced as a by-product of the anaerobic decomposition of livestock manure consisting of about 60-80 percent methane, 30-40 percent carbon dioxide, and trace amounts of other gases. Combined
Heat and Power: (CHP) a system for producing electricity while capturing and using heat. Hydraulic Retention Time :(HRT) average length of time any particle (liquid or solid) of manure remains in a manure treatment or storage structure.
Mesophilic :Relating to, or being at a moderate temperature of about 30 to 35 c degrees.
Return Activated Sludge:(RAS) a process by which some of the digester bacteria are returned to the digester reducing the amount of energy.
Solids Retention Time: (SRT) average length of time any solid particle of manure remains in a manure treatment or storage structure. This is calculated by the quantity of solids maintained in the digester divided by
the quantity of solids wasted each day.
