Figure 6-15. Baffle grease traps--A, barrel type; B, box type.
b. Barrel Filter. The barrel filter grease trap may be made from a 30 to 50-
gallon barrel or drum which has had its top removed and a number of large holes bored
into the bottom (figure 6-16). Eight inches of gravel or small stones are placed in the
bottom and covered with 12 to 18 inches of wood ashes or sand. A piece of burlap is
fastened to the top of the barrel to serve as a coarse strainer. The trap may be placed
directly over the soakage pit or it may be placed on a platform with a trough leading to
the pit. If it is placed directly over the pit, the bottom may be removed instead of having
holes bored into it. Every two days, the grease trap should be emptied, washed, and
refilled with fresh ashes or sand. The old ashes or sand should be buried. The burlap
strainer should be either washed or renewed every day.
Figure 6-16. Barrel filter grease trap.