All grease trap cleaning technicians at New Orleans Grease Trap Cleaning and Cooking Oil Recycling are certified by the Sewerage and Water Board of New Orleans to clean and inspect grease traps and grease interceptors per city ordinance FOG 16.5. An important aspect in being a certified grease trap cleaning technician and inspector is having a good understanding of how to measure the FOGs (fats, oils, grease, and food solids) within a grease trap and/or grease interceptor. Today we would like to go over the process of how to measure the FOG within a grease trap, which we have outlined below.
Step 1: Locate the grease trap or grease interceptor.
Step 2: Open the containment lid to the unit.
Step 3: With a waste-water measuring tool, often called a “Sludge Judge“, lower the sampling tube to the bottom of the outlet side of the grease trap or grease interceptor. When the tube reaches the bottom of the unit, only then close off the sample tube to collect a full sample. When the sample has been taken and the valve to the sampling tube closed, raise the tube back to surface for evaluation.
Step 4: After the sample has been taken, it is now time to calculate the measure of FOG within the measurement tool. This is an easy calculation, and we have given a sample calculation below.
The FOG measurement sample provides the grease trap is 50 inches in depth. Of this 50 inches, the wastewater make-up is as follows: 30 inches of water, 10 inches of fats/oils/grease, and 10 inches of solids.
Once we have the FOGs composition, we can easily calculate the measurement as follows:
(10 inches fats, oils, grease + 10 inches solids) / 50 inches total depth = 40% FOG
Want to know more about how to measure FOG within your grease trap or grease interceptor?