4. Conclusion
This study demonstrated that flow rate of 2 L/min
and HRT of 10 hrs (influent) was found to be the
optimal condition for domestic wastewater treatment
by using simple and modified grease traps. However,
the modified grease trap was higher efficiency of SS,
BOD, and FOG removal than the simple grease trap.
Moreover, the modified grease trap that added
arrangement media of 5 cm diameters Mon brick, 1 cm
diameter gravel and 3 cm diameter Mon brick,
respectively with the media ratio at 1:1:2 was the
highest efficiency of SS, BOD, and FOG removal
approximately 80%