Abstract: Elongated processing elements are anchored at opposite ends thereof between holding discs retained within rigid seal rings enclosing a chamber within a cylindrical module housing, through which a flow of contaminate-laden bilgewater is conducted. Such discs are formed within the seal rings with the elongated elements positioned therein by deposit and curing of epoxy resin. Such elements are then assembled within the module housing to seal the chamber thereby established therein. Spacing between the bundled elements is maintained by spacers to accommodate filtration of the bilgewater during flow thereof through the chamber and lateral outflow of a cleansed filtered portion from the elements through a drain outlet.

Abstract: A coupling for a torsional drive includes a rotatable shaft, an outer surface of which has a keyway comprising a half-round groove. A rotatable hub disposed around the shaft and coaxial with the shaft has an inner surface provided with a second keyway, the second keyway also having a half-round groove. The two keyways are alignable so as to form a cylindrical keyway between the hub and the shaft. A cylindrical key is insertable into the cylindrical keyway between the shaft and the hub to prevent relative rotation therebetween. A plug disposed inside the rotatable shaft prevents radial deformation of the shaft. The material of the hub and the shaft may differ, in which case the material of the key is optimized to reduce stress concentrations and stiffness differentials between the hub and the shaft. The cylindrical key and the cylindrical keyway also may be conically tapered. The formed keyway and key may also be elliptical.