Abstract: Systems and methods are disclosed herein for ion exchange wherein process fluid is injected at multiple points within the ion exchange vessel simultaneously, allowing the contaminants and/or the contaminated process fluid to be distributed homogeneously throughout the ion exchange media. These systems and methods may be implemented in one or more of fixed, mobile, and modular embodiments.

Abstract: An inverter power supply device designed to supply power to a resonant circuit, includes a generator, having at least one switch series-connected with the resonant circuit and a freewheeling diode parallel-connected with the switch, the switch being controlled by a periodic signal with a frequency known as a working frequency. The device furthermore includes first device providing a measurement of the instantaneous current flowing in the resonant circuit; second device to deduce the maximum current (I.sub.max) from the instantaneous current; third device to deduce the current known as the switching current from the instantaneous current, this switching current being the current for which the switch or the freewheeling diode that is associated with it becomes conductive (I.sub.commut); first control device for the switch, receiving the maximum current(I.sub.max), the switching current (I.sub.