Classifying tanks, related systems and methods of operating the same are described.

The present invention is a process of recycling plastics based on eliminating the need to pre-sort different plastic materials and using physics to separate plastic particles based on the gravitational weight of those particles. Plastics are grounded down into very small pellets using a uniform pressure cylinder with dimples. Then, the small plastic pellets are separated using a float-sink method. Using the float-sink separation method, the plastics can be lifted and organized by density and by gravitational weight from lower densities to higher densities using different gases or liquids with different gravity weights or densities.

The present invention is a process of recycling plastics based on eliminating the need to pre-sort different plastic materials and using physics to separate plastic particles based on the gravitational weight of those particles. Plastics are grounded down into very small pellets using a uniform pressure cylinder with dimples. Then, the small plastic pellets are separated using a float-sink method. Using the float-sink separation method, the plastics can be lifted and organized by density and by gravitational weight from lower densities to higher densities using different gases or liquids with different gravity weights or densities.

A method for reducing the turbidity of as-mined sand comprising adding water to the as-mined sand to increase its moisture content to between about 5% and about 40% by weight, mixing the sand and water, piling the wet sand on the ground, allowing the sand to rest for a predetermined period of between about 12 hours and about 3 days, then harvesting less than all of the sand from the pile as reduced turbidity sand.

A method for reducing the turbidity of as-mined sand comprising adding water to the as-mined sand to increase its moisture content to between about 5% and about 40% by weight, mixing the sand and water, piling the wet sand on the ground, allowing the sand to rest for a predetermined period of between about 12 hours and about 3 days, then harvesting less than all of the sand from the pile as reduced turbidity sand.

A method for reducing the turbidity of as-mined sand comprising adding water to the as-mined sand to increase its moisture content to between about 5% and about 40% by weight, mixing the sand and water, piling the wet sand on the ground, allowing the sand to rest for a predetermined period of between about 12 hours and about 3 days, then harvesting less than all of the sand from the pile as reduced turbidity sand.

A method for reducing the turbidity of as-mined sand comprising adding water to the as-mined sand to increase its moisture content to between about 5% and about 40% by weight, mixing the sand and water, piling the wet sand on the ground, allowing the sand to rest for a predetermined period of between about 12 hours and about 3 days, then harvesting less than all of the sand from the pile as reduced turbidity sand.