Reduction of hydrogen sulfide (H2S) from poultry based biogas by aeration technique

Biogas, produced in anaerobic digestion (AD)-plants, primarily consists of methane (CH 4 ) and carbon dioxide (CO 2 ) with smaller amount of hydrogen sulfide (H 2 S) and ammonia (NH 3 ). Trace amount of some other gases are occasionally present in biogas. For electricity generation from biogas needs reduction of H 2 S, because it forms a complex bond with iron hence damage the generator. Reduction of Hydrogen Sulfide (H 2 S) from poultry based biogas can be done by dosing air/oxygen to the main digester into the digestion process. For optimization there are two sets of aeration technique have been followed. Firstly two hour interval air injection and secondly air injection based on percentage of hourly gas production. The optimum air percentage to minimize H 2 S should be at least 3.00%. After aeration H 2 S level comes to the desired level (