A deep cleaning method for highly contaminated soil comprises a feeding step, a washing step, a first separation step, a second separation step, a countercurrent washing step, and a wastewater treatment step. The countercurrent washing step is to receive the sand water that completed the second separation step. The sand water is introduced into a countercurrent washing tank from the top, and the clean water is injected into the bottom of the countercurrent washing tank to form a countercurrent washing state. The washed sand is discharged from the bottom of the countercurrent washing tank, and the mud washed from the sand is overflowed by the rising water flow and collected to a wastewater treatment unit. Through the backwashing step, the highly oil-contaminated soil with low mud content can also be applied to the water washing method, thereby expanding the treatable range of oil-contaminated soil.

A deep cleaning method for highly contaminated soil comprises a feeding step, a washing step, a first separation step, a second separation step, a countercurrent washing step, and a wastewater treatment step. The countercurrent washing step is to receive the sand water that completed the second separation step. The sand water is introduced into a countercurrent washing tank from the top, and the clean water is injected into the bottom of the countercurrent washing tank to form a countercurrent washing state. The washed sand is discharged from the bottom of the countercurrent washing tank, and the mud washed from the sand is overflowed by the rising water flow and collected to a wastewater treatment unit. Through the backwashing step, the highly oil-contaminated soil with low mud content can also be applied to the water washing method, thereby expanding the treatable range of oil-contaminated soil.

A deep cleaning method for highly contaminated soil comprises a feeding step, a washing step, a first separation step, a second separation step, a countercurrent washing step, and a wastewater treatment step. The countercurrent washing step is to receive the sand water that completed the second separation step. The sand water is introduced into a countercurrent washing tank from the top, and the clean water is injected into the bottom of the countercurrent washing tank to form a countercurrent washing state. The washed sand is discharged from the bottom of the countercurrent washing tank, and the mud washed from the sand is overflowed by the rising water flow and collected to a wastewater treatment unit. Through the backwashing step, the highly oil-contaminated soil with low mud content can also be applied to the water washing method, thereby expanding the treatable range of oil-contaminated soil.

An assembly for a high output hydrodynamic separation unit includes, in one form, several components or parts. Top and bottom plates serve as caps for and distribute force through layers of separation channels. The compressive forces seal the channels and prevent leakage from the channels. An optional middle plate may also be provided to create smaller subsets of the layers of separation channels. At least one connector is provided to the combination of components to compress the layers of separation channels. In a variation, an optional outer shell may encase the unit to provide support and compress the stack with a unique threaded configuration.

An assembly for a high output hydrodynamic separation unit includes, in one form, several components or parts. Top and bottom plates serve as caps for and distribute force through layers of separation channels. The compressive forces seal the channels and prevent leakage from the channels. An optional middle plate may also be provided to create smaller subsets of the layers of separation channels. At least one connector is provided to the combination of components to compress the layers of separation channels. In a variation, an optional outer shell may encase the unit to provide support and compress the stack with a unique threaded configuration.

Hydraulic classifiers are provided for sorting material using injected water. Some embodiments include upper and lower housings having different cross-sectional shapes. In some embodiments, certain improvements are provided for cleanout and/or removal or replacement of teeter bars.

An innovative compact high efficiency hydraulic particle separator is disclosed. Featured embodiments of the innovative separator comprise a cylindrical main body having an upper chamber and a lower chamber separated by a partition. A liquid fluid flow upwelling through the partition from the lower chamber is caused to mix with tangential jet of fluid flowing introduced above the partition in the upper chamber produces a spiral flow within the upper chamber and flows upward to the top of the apparatus. Particle mixtures containing low density and high specific gravity particles and other solids are introduced into the upper chamber are immediately contacted by the upward spiral flow, where low-density particles are immediately entrained in the spiral flow and separated from the high-density particles, swept upward and exit the apparatus. High-density particles may be forced outward and collect along the wall of the apparatus, falling through the partition to the lower chamber and settle in a collection vessel.

An innovative compact high efficiency hydraulic particle separator is disclosed. Featured embodiments of the innovative separator comprise a cylindrical main body having an upper chamber and a lower chamber separated by a partition. A liquid fluid flow upwelling through the partition from the lower chamber is caused to mix with tangential jet of fluid flowing introduced above the partition in the upper chamber produces a spiral flow within the upper chamber and flows upward to the top of the apparatus. Particle mixtures containing low density and high specific gravity particles and other solids are introduced into the upper chamber are immediately contacted by the upward spiral flow, where low-density particles are immediately entrained in the spiral flow and separated from the high-density particles, swept upward and exit the apparatus. High-density particles may be forced outward and collect along the wall of the apparatus, falling through the partition to the lower chamber and settle in a collection vessel.

An assembly and method for gravitationally separating gold from particles, and specifically for separating small components of gold, less than 1 millimeter from small particles. A series of sieves having graduated mesh sizes, and arranged in a sequential, stacked configuration sieves the aggregate of large particles and larger components of gold. The remaining small particles and smaller components of gold fall into a container. A pressurized column of fluid is forced into the container. The fluid has sufficient flow velocity to suspend the lighter small particles, but insufficient flow velocity to support the denser, high specific gravity gold. Gold has a large specific gravity relative to the fluid and particles. Gravity causes the gold to falls into a transparent collection conduit. Manipulation of valves enables gold to redirect to a collection bin. Fluid flow is shut, enabling small particles to be flushed out through gravitational forces and excess fluid momentum.

A method of recycling a filler included in artificial turf by sorting the filler into two or more materials, including: a first sorting operation of sorting the two or more materials based on a grain size; and a second sorting operation of sorting the materials, which are sorted by the first sorting operation and have grain sizes belonging to a predetermined range, based on specific gravity.