FOGs in your Sewer
Not Fog - FOGs! This stands for Fat, Oil and Grease and it comes from your dinner dishes, through your sink or dishwasher and into your sewer or septic tank. The amount of FOGs that enter the sanitary sewage system from domestic kitchens can USUALLY be dealt with by anaerobic digestion by bacteria in the sewer water. In other words, it is eaten up by the bugs in the sewer. BUT, where the sewer pipes are small or too many properties are connected or there is a commercial food preparation company discharging water to the sewers, the amount of FOG can overwhelm the bacteria and the FOGs do not get digested.
This leaves fat available to cling to any imperfection or roughness in the sewer. Once fat starts collecting, other items in the sewer (which should not be there in the first place) like so-called disposable baby wipes get caught up by the fat and become part of a fatberg. Fatbergs can be enormous, as big as a bus or even a jet aeroplane and can block sewers, leading to roadworks to clear them. Commercial premises in most areas MUST have a grease trap to collect grease and food solids before they enter the sewer syste,.
All About Grease Traps
You can read about grease traps, what they are, why they are needed and how they work on a Hubpages article here . You can see a video about grease traps on this webpage here . And you can see a video about clearing a fatberg here on Youtube .
Image Credit » Picture is mine, (c) MegL