The waste or tailings are collected and transferred to a correction stage that stabilizes the pH value to neutral level. An “Open Top” charcoal filter is employed as a settling tank to equalise the volumes.
A pump with inverter distributes the filitered liquid from the Open Top filter and sends it to a bank of 25 microns cartridge filters.These filters act as security to trap any suspended solids that could clog the next stage Plimmer cells. The p
re-treated water then enters Plimmer cellsfor next stage treatment – desalinisartion.
During this stage the Plimmer is able to remove up to 90% of the salinity. In the event that the incoming water produced has very low TDS a small amount of sodium carbonate can be added to recreate the buffering power required for optimum processing before being transferred to the storage tanks.
The Plimmer cells will produce a liquid concentrate with a very high salinity.
To reduce the volume of this discharge it must pass through a buffer tank with a pump with a pressure tank and then though cartridge filters again before being sent to another set of Plimmer cells that are connected in series.
Using this ‘Plimmer Galvano’ system, there are two liquid streams; (1) good quality desalinated water equalling 80-95% of the total volume for reuse and (2) concentrate which is set to the distillation system.
Any changes in the salt concentration is automatically be sent for distilation .
As the operation of the distilation unit is fed with a distallate reduced by a factor of 5 by the Plimmer Galvano process, significant savings in both operational and capital investment are available maing the ROI very attractive.
By using the Plimmer Galvano system, the distillate can be placed directly in the final wash and unloaded feedstock will be processed by the Plimmer cell effectively creating a fully closed hydraulic circuit.
Plimmer also allows the concentration of salts to be madeautomaticlywithout changing the chemical composition with very small energy usage and cost.
Plimmer Galvano has a very low energy consumption, operating at only 1.5 bar with no membranes ior resin beds that can potenially hinder the flow of water.
The energy consumption is linked to the operation of the Plimmer cells which is only about 70 W per m3 / h of treated water with a removal of 90% of the original saltcontent, with input concentrations from 1000 mg / l of NaCl