Waste management: a study on generating organic fertilizer from oil and grease trap systems

The grease and oil trap systems (GOTS) of four university food service establishments (FSE) were assessed treated to evaluate the potential use sludge collected produce compost. from each FSE was kept in a drying bed for 30 days (SDB), during which time calcium oxide frequently added stabilization. deposited monthly reduced half after process then composter mixed period 22 with constant agitation. compost obtained degrading enzymes denominated enzymatic composting (EC), while remaining not enzyme non-enzymatic (NEC). total cycle lasted 83 days, various physical chemical analyzes conducted three types substrates (SDB, NEC, EC). research 2.5 years. percentages phosphorus, potassium, magnesium, suggest as organic fertilizer. A recommendation resulting this is quality by mixing it other such fruit peels high nitrogen content wastewater treatment systems.