Anaerobic co-digestion of CSW with 1%GW had potential to improve the quality and quantity of
biogas. The cumulative methane production and methane yield were 5,184 mLCH4 and 577
mLCH4/g VS-added. The cumulative methane production and methane yield was increased by 167% and
108% when compared with digested CSW alone. The results also showed that the methane production in
continuous reactor was achieved with methane production rate of 2.33 LCH4/L-reactor.day and methane
yield was 309 mLCH4/g COD-removed (640 mLCH4/g VS-added) of removal COD 80%. Adding GW as
a carbon source into CSW was resulted in increasing C/N ratio from 11 to 26 and also diluted the toxicity
of ammonia in the system. The maximum methane production of co-digestion between 99%CSW and 1%
GW was 5.8 m3 CH4/ m3 of mixed wastewater and electricity production of 1 m3 of mixed wastewater
would be 207 MJ or 58 kWh of electricity. So, GW can be used a co-substrate because it enhanced a
potential the methane production in CSW.