Grease flowing into the sedimentation tank slaughter sewage treatment equipment, materials, waste water containing sand and other slaughter wastewater treatment equipment sales, which can be removed by natural sedimentation, settling sediment sludge pumped regularly with slaughtering sewage sludge thickening tank general reddish Brown slaughtered sewage treatment equipment, unpleasant stench, which contains a lot of blood, fat mass, wool, meat scraps, bone chips, offal debris, undigested food, feces and other contaminants, suspended solids content.