Abstract: A sludge elimination system, particularly adapted to process the waste activated sludge from a standard activated sludge plant, has three treatment cells. Each of the treatment cells has an anaerobic zone and an aerobic zone above it. Effluent from the facility is introduced into the anaerobic zone in the first cell; the aerobic zone of the first cell has a fluid connection to the anaerobic zone of the next cell, and so on. Residence times are preferably 140, 20 and 20 days per cell. The aerobic zone is created by the injection of air with coarse aerators. Oxygen introduced by the aeration reduces the volatiles and clean water eventually exits the system.

Abstract: An animal containment system includes a cage with a lid and a water flask. The water flask has a generally rectangular footprint and sits on top of the cage, preferably on the lid itself. A sipper tube connected to a port on one of the sides of the water flask can be inserted through a hole in the cage lid to a height sufficient for the animals in the cage to reach up to obtain water. The lid of the cage preferably includes a recessed portion in which at least a portion of the water flask is disposed. The water flask includes a bottom surface that is sloped to facilitate emptying of the flask into the sipper tube. The water flask has a relatively low profile and thus, contributes very little to the height of the cage. Thus, existing rack designs can be used to house the same number of cage and water flask assemblies of the present invention as was possible with conventional isolation cage and water bottle designs. Further, the water flask can be replaced without having to remove the lid of the cage.

Abstract: An animal containment system includes a cage with a lid and a water flask. The water flask has a generally rectangular footprint and sits on top of the cage, preferably on the lid itself. A sipper tube connected to a port on one of the sides of the water flask can be inserted through a hole in the cage lid to a height sufficient for the animals in the cage to reach up to obtain water. The lid of the cage preferably includes a recessed portion in which at least a portion of the water flask is disposed. The water flask includes a bottom surface that is sloped to facilitate emptying of the flask into the sipper tube. The water flask has a relatively low profile and thus, contributes very little to the height of the cage. Thus, existing rack designs can be used to house the same number of cage and water flask assemblies of the present invention as was possible with conventional isolation cage and water bottle designs. Further, the water flask can be replaced without having to remove the lid of the cage.

Abstract: A cage for receiving a multiple dosage feeder is provided. The multiple dosage feeder includes a food holding feeder member and a feeder housing member disposed in an opening in the cage. The food holding member holds a plurality of measured dosages of food or other substances, and at least a portion of the food holding member extends to the cage-interior side of the opening. A snap lock releasably secures the feeder housing member to the wall of the multiple dosage feeder. At least a portion of the food holding member is rotatable within the housing member so as to expose the single dosage of the plurality of dosages, while the housing member prevents access to any remaining dosages on the cage-interior side of the opening.