TURNITIN_ Biogas production from oil palm empty fruit bunches of post mushroom cultivation media

t.The Empty fruit bunches are one of the palm oil industry wastes, which can be used for
mushroom cultivation. Post-cultivation of mushroom from former EFB-mushroom media
(EFBMM) has the potential to be processed into biogas. The purpose of this research was to
examine optimum co-digestion conditions for biogas production of EFBMM.The research was
carried out in an anaerobic digester with three different conditions - dry fermentation (Water
content (WC)/Total Solid (TS) ratio 1.5 - 3.5), semi-wet fermentation (WC/TS ratio = 4.0 - 5.7)
and wet fermentation (WC/TS ratio> 9.0) conditions. Digester of capacity 50L was used.
Fermentation was done using 20% cow feces as inoculum which then added with circulation
system for 70 days. The results showed that optimum biogas production were produced in semiwet fermentation conditions (WC/TS ratio = 4). It was produced 37.462 liters (2.420 liters CH4/Kg
Volatile Solid (VS)) of biogas with methane contain about 26.231%. Total volume of inoculum
during process was 19.6 liters (1: 4 w/v) with absorbed TS inoculum ratio, TS/I = 0.4 (1:2.5 w/v).
The result of research also showed that biogas which was produced from control about2.865 liters
(0.041 liters CH4/KgVS) , with TS absorbed inoculum ratio, TS/I = 0.5 (1: 5w/v).