2.3.2 Factors affect the treatment efficiency of
simple and modified grease traps
Domestic wastewater was filled in both of simple
and modified grease (optimal media ratio) traps. The
flow rates of wastewater (influent) were set at 2, 3, 4
and 5 L/min. Then, effluent was closed when the
volume of wastewater reached to 45 L in order to set