The purpose of this study is to investigate the
biogas potential from automotive wastewater codigested with Synthetic wastewater treated in anaerobic
reactor. This experiment was run by continuously
mixed with mechanical Agitator stirring tank reactor
and were established under mesophilic condition at
temperature of 38°C. The source of inoculum used in
this study were obtained from sewage treatment plant.
The experiment was analyzed based on COD removal
and biogas production in relation with parameters such
as pH, organic loading rate, alkalinity and effect of Zinc
and Copper which runs on automotive wastewater.
From the result obtains, the reactor condition was
unstable during mono digestion of automotive
wastewater which aligned with indication of decreasing
biogas production, low pH value below 6.0 and low
COD removal with value of 63.4%. However, the
reactors become stable during co digestion of
automotive wastewater with Synthetic wastewater with
0.12 g/L/d OLR and with highest methane production
0.140 L of CH4 / day. The findings illustrate the nutrient
available in Synthetic wastewater could enhance the
synergistic effect in co digestion with automotive
wastewater and therefore resulted with the highest
COD removal rates.
Keywords : Anaerobic co-digestion, chemical oxygen demand, automotive wastewater, heavy metal.