In this research, an anaerobic co-digestion using
decanter cake from palm oil mill industry to improve the biogas
production from frozen seafood wastewater is studied using
Continuously Stirred Tank Reactor (CSTR) process. The experiments
were conducted in laboratory-scale. The suitable Hydraulic Retention
Time (HRT) was observed in CSTR experiments with 24 hours of
mixing time using the mechanical mixer. The HRT of CSTR process
impacts on the efficiency of biogas production. The best performance
for biogas production using CSTR process was the anaerobic codigestion
for 20 days of HRT with the maximum methane production
rate of 1.86 l/d and the average maximum methane production of
64.6%. The result can be concluded that the decanter cake can
improve biogas productivity of frozen seafood wastewater.