A process is disclosed for recovering elemental phosphorus from an aqueous sludge and converting the residue into non-hazardous waste. The control device or a sensor device of the control device can be installed at least partly in a fume hood of the stove. In another embodiment, a plurality of material wells are used to mix different materials to be dispensed with an applicator. The circular knitting machine continues to operate at the machine rate during the taking up of the free end. When one of the first clasping portions is locked by the stop portion, the coil spring is compressed, while when the first clasping portion is unlocked from the stop portion, the coil spring is decompressed and drives the gear wheel to rotate to cause the supporting members to move relative to the gear wheel. The compositions are easily molded and often have particular utility in making, for example, automotive facia, parts and other household articles.