A mobile apparatus and method of operation for the pretreatment of
wastewater to remove and concentrate fats, oils, grease and settled
solids using vacuum flotation and a clarifier and returning the
pretreated wastewater to the source structure, tank or sewer system. The
vacuum flotation process is enhanced by injecting hydrogen peroxide to
increase the dissolved oxygen concentration and a cationic emulsion
polymer as a coagulant to the wastewater prior to removal into the vacuum
flotation tank by vacuum pumping.