Abstract: A filter system for continuously removing solid matter from a wastewater is provided. The flow of wastewater is automatically alternated between a pair of filter chambers, each of which contain a filter assembly, upon the filter assemblies reaching a predetermined spent condition. As the wastewater is being introduced into one of the filter chambers, the filter assembly in the other filter chamber is automatically backwashed and readied for another filtering cycle. Each filter assembly includes a filter element coated with a diatomaceous earth filter media through which the wastewater is drawn by creating a vacuum downstream of the filter assembly.

Abstract: A portable wastewater treatment system for recycling an aqueous surfactant solution utilized in a parts washer assembly for cleaning parts. The system including a contaminated solution storage tank, a treated solution storage tank, and a portable wastewater treatment apparatus wherein contaminated aqueous surfactant solution is collected in the contaminated solution storage tank, withdrawn from the contaminated solution storage tank, injected with air and passed into a mixing zone where the mixture is sprayed with water. The treated solution in the mixing zone is passed into a quiescent zone where light sludge is passed to the top of the quiescent zone and heavy sludge is passed to the bottom of the quiescent zone, the treated wastewater being disposed between the light sludge and the heavy sludge and the treated wastewater being passed from the quiescent zone into a discharge zone where the treated wastewater is discharged therefrom. The heavy sludge is selectively discharged from the quiescent zone.

Abstract: A wastewater treatment system wherein wastewater and air are passed into a mixing zone where the mixture is sprayed with water. The treated wastewater in the mixing zone is passed into a quiescent zone where light sludge is passed to the top of the quiescent zone and heavy sludge is passed to the bottom of the quiescent zone, the treated wastewater being disposed between the light sludge and the heavy sludge and the treated wastewater being passed from the quiescent zone into a discharge zone where the treated wastewater is discharged therefrom. The heavy sludge is discharged from the quiescent zone at predetermined discharge times and at predetermined intervals. The light sludge is passed from the quiescent zone into a light sludge bin where the light sludge is discharged therefrom for predetermined discharge time at predetermined discharge intervals. The heavy sludge and/or the light sludge then is passed into a drying system for drying the light sludge and the heavy sludge.

Abstract: A portable wastewater treatment system for recycling an aqueous surfactant solution utilized in a parts washer assembly for cleaning parts. The system including a contaminated solution storage tank, a treated solution storage tank, and a portable wastewater treatment apparatus wherein contaminated aqueous surfactant solution is collected in the contaminated solution storage tank, withdrawn from the contaminated solution storage tank, injected with air and passed into a mixing zone where the mixture is sprayed with water. The treated solution in the mixing zone is passed into a quiescent zone where light sludge is passed to the top of the quiescent zone and heavy sludge is passed to the bottom of the quiescent zone, the treated wastewater being disposed between the light sludge and the heavy sludge and the treated wastewater being passed from the quiescent zone into a discharge zone where the treated wastewater is discharged therefrom. The heavy sludge is selectively discharged from the quiescent zone.