A persistent switch control system, a superconducting magnet apparatus employing the persistent switch control system, and a method of controlling a persistent switch. In preferred embodiments, the diode is formed as a vertical pillar disposed between conductors. The device further selects, from the determined feature peers, a set of feature peers for the modified customer packet to traverse, and forwards, based on the modified feature header, the modified customer packet to one of the feature peers in the selected set of feature peers. The process inhibits souring in the reservoir insofar as the treated injection water results in a lower level of souring in the reservoir over time than if the feed water had been injected into the reservoir.