Idea Centerugal filter on slewing truck

A slewing truck uses air and water to dislodge earth and the an industrial vacum to remove the surveyors contruction debre. A problem has presented itself in the form mechanical limitations. The slewing truck often needs to be dumped. which loses prodictivity to the surveyor and may  pollute the environment. If the truck could filter the slew then the earth minus materials desolved in water that is the result of slew seperation or slew filtering could be returned to the hole and construction costs of replacement earth could be reduced.  The waste water from slewing could be disposed of in water to be desalonized or via evalopation tanks at work or on sight.  The hopes are to create a set of spinning water screws and earth screws to seperate the slew in a special filter chamber.  Two filter chambers would be created. one for intail seperation of the earth and one for continual purtification of the water.  At some point the earth is too solid and continual filtration will damage the equipment. The outer most cilindrical screw should be the earth screw.. The inner should be conal and stationary having a counter direction curve to lift water up and soil down.. The center screw should be for water and should push the water down and exit into the waste water tank.  I need to use some like cae linux to simulate the fluid dynamics then to post this to several construction development groups and dallas makeespace.  http://www.vacmasters.com/air4000.html