WASTEWATERBy Rick LallishWhat is the correct way to express the organic loading rate on a trickling filter?A. Pounds of BOD per square foot of media per dayB. Pounds of BOD per cubic foot of media per dayC. Pounds of BOD per 1,000 square feet of media per dayD. Pounds of BOD per 1,000 cubic feet of media per dayAnswer: D. The organic loading on a trickling filter is an important factor for proper operation. Simply, it is the amount of organic matter (BOD) fed to the trickling filter per day. We express this as pounds of BOD per thousand cubic feet of media per
