Abstract: An English-Metric drive including a generally cylindrical rigid body having a polygonal shaped bore extended axially therethrough and with the polygonal shaped bore bounded by a first hexagonal arrangement of twelve planar primary facets axially aligned with and offset from a second hexagonal arrangement of twelve planar secondary facets to thereby create a set of six primary points and a set of six secondary points with each primary point formed of a pair of primary facets joined at an apex and with each secondary point formed of a pair of secondary facets joined at an apex and wherein a first distance as measured between one of the primary facets of one of the primary points of the first arrangement and the parallel primary facet positioned directly opposite thereto is between about 1/2 to 31/2% different than a second distance as measured between one of the secondary facets of one of the secondary points of the second arrangement and the parallel secondary facet positioned directly opposite thereto.

Abstract: A process is disclosed for treating food wastewaters by acidifying to a low pH, adding an alginate, and, preferably, adding lime to a pH of at least 7.0, without adding iron or aluminum to assist in coagulation and flocculation of the wastewater. A floc is formed at acid pH in some wastewaters and at neutral to alkaline pH in other wastewaters treated with lime. After recovery of the floc as a sludge, the process provides at least about 70% removals of Total Suspended Solids (TSS), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) at reasonable costs and with negligible formation of free fatty acids in the resulting sludge.