A method and system for purifying production water obtained from oil and gas operations so that the purified water need not be disposed of by forced injection back into the geological formation but can be put to a beneficial use such as agriculture, irrigation, industrial or municipal or potable applications. The bias circuit includes a bias transistor and a feedback node, wherein the feedback node is coupled to a control terminal of the bias transistor via a first impedance element. A kiosk of the invented system may also be configured to utilize renewable-energy mechanisms to provide power for operation andor recharging. Sensors determine the azimuthal direction of inclination of the wellbore at a first location therein and while traversing from said first location. A core material of the coil is made of a Mn\u2014Zn-based ferrite. This permits the portable computer to be coupled to peripheral devices connected to the docking station without additional connectors on the portable computer and the docking station.