A process and a device for treating and upgrading raw manure. A discharge gap detection unit detects a voltage between a wire electrode and a workpiece. The pivot element includes a pivot element plate with an arcuate slot that received a bolt. Surfactant may be added to the liquid base composition so that, when the composition is dried into sheet form, the sheet will generate foam when exposed to water and have cleansing properties. The tapered top has a central tip and a fluted land defined in the tapered top adjacent one of the edges. The carriers are multiplexed onto a single communications link and separated, on reception, by filters swept in synchronism so as to de-multiplex the signals.