Draw a diagrammatic sketch of a biogas plant and label its various components: Gas Holder,Sludge Chamber,Digester,and Dung + water chamber.

(N/A) biogas plant is a concrete tank that is $10-15$ feet deep,in which bio-wastes and slurry of dung are collected.
$1$. Dung + water chamber: This is the inlet where the mixture of cattle dung and water is fed into the digester.
$2$. Digester: It is a sealed chamber where anaerobic digestion of organic matter takes place by methanogenic bacteria (e.g.,Methanobacterium).
$3$. Gas Holder: It is a floating cover placed over the slurry in the digester,which rises as gas is produced.
$4$. Sludge Chamber: This is the outlet through which the spent slurry (leftover waste) is removed and can be used as fertilizer.