Abstract: A drain cassette for a dialysis unit has a fluid channel between venous and arterial connection ports, and a valve may controllably open and close fluid communication between a drain outlet port and the venous connection port or the arterial connection port. A blood circuit assembly and drain cassette may be removable from the dialysis unit, e.g., by hand and without the use of tools. A blood circuit assembly may include a single, unitary member that defines portions of a pair of blood pumps, control valves, channels to accurately position flexible tubing for an occluder, an air trap support, and/or other portions of the assembly. A blood circuit assembly engagement device may assist with retaining a blood circuit assembly on the dialysis unit, and/or with removal of the assembly. An actuator may operate a retainer element and an ejector element that interact with the assembly.

Abstract: A process for biodegradation of a xenobiotic. A process for biodegradation of a xenobiotic comprising the steps of: contacting an organic phase comprising the xenobiotic and at least one substantially water-immiscible organic solvent with an aqueous phase comprising water and a microorganism capable of metabolizing the xenobiotic; partitioning a portion of the xenobiotic from the organic phase to the aqueous phase such that the concentration of the xenobiotic in the aqueous phase is substantially non-toxic to the microorganism; and causing the microorganism to metabolize the xenobiotic in the aqueous phase.