What is the best approach to restart a FOG pretreatment unit?
//= $frontData["question_content"] ?>
The facility in question has a dissolved air flotation system (FeCl3 and polymer injection) with a hydrolysis tank (single agitator), two reactors, a biomass tank and, at the end, a gravity belt. When there are malfunctions, the reactors go septic and there is no flocculation whatsoever on the gravity belt. The facility also process activated sludge from a WWTP, which can be added to the biomass or upstream of the reactors. Usually, collected municipal sludge helps restart the unit.