There are provided processes for treating wastewater. Inside a single accumulator housing extending in the axial direction in a single piece over a high pressure part and a low pressure part, an accumulator piston defines a high pressure-sided fluid chamber and a low pressure-sided fluid chamber. A retainer is secured to the neck portion of the liner and aligned with the opening in the lid, the retainer including external threads. A gate electrode is formed on the gate dielectric layer on the top surface and sidewalls of the semiconductor body. The present radio receiver requires a low chip area in conjunction with low power consumption, but offers a high sensitivity and accuracy based on the digitally implemented demodulation. In the process, a moving fibrous web is conditioned after the drier unit of a papermaking machine by applying a flow of moistened gas through one or more arrays of radial jet reattachment nozzles placed in close proximity to the web surface prior to a calendering unit or prior to a steaming unit placed between the nozzles and the calender unit to cool the web andor increase its moisture content.