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Solids Separation
Service Summary
As the nations largest environmental services company, Onyx, a Vivendi company has an unparalleled pool of professional, technical, and operations personnel equipped with the best solid separations resources in the industry. Onyxs process and technical recommendations are based on the optimum way to meet and/or exceed the customers unique goals and objectives based on his/her specific sludge stream
Filter Press Technology
Onyx prepares the sludge for the filter press by screening it, mixing it, and chemically conditioning it as necessary. The conditioned sludge is pumped to the filter press using high-pressure, fast-fill, centrifugal feed pumps to maximize the production rate and enhance the filter cake quality (high pressure).
Belt Press Technology
The sludge is injected with the polymer in-line then passed through a static mixer to flocculate the solid particles. The conditioned sludge is pumped to the belt press using positive displacement feed pumps so as not to shear the floc formed by the polymer make-down and injection process.
Centrifuge
Typically, the centrifuge will require a polymer to flocculate the solid particles and perhaps a de-emulsifier to break emulsified oil/water/solid streams. The sludge is injected with the polymer (and de-emulsifier if necessary) in-line then passed through a static mixer to flocculate the solid particles (and water wet the solids by the action of the de-emulsification agent). Oily waste streams often benefit from heating (180 degrees F) to decrease viscosity and enhance the ultimate oil/water/solid separation. The conditioned sludge is pumped to and through the centrifuge using positive displacement feed pumps so as not to shear the floc formed by the polymer make-down and injection process.
Dryer Technology
Onyx owns and operates thermal dryers used to remove additional water and organic constituents from centrifuge or filter press cake to maximize the volume reduction of hazardous/listed waste streams. The addition of a thermal dryer to a sludge separation/solids recovery process can often result in an overall waste volume reduction of 98%.






Sludge Treatability Laboratory
Onyx owns and operates a modern, full-service sludge treatability laboratory located in Ashland, Kentucky. Our lab is equipped with bench top test equipment that simulates full-scale process equipment and can predict actual field results based on representative sludge samples. The lab tests and evaluates every sludge sample for using every possible chemical (e.g., polymer, coagulant, filter aids, etc.) and mechanical (e.g., filter press, belt press, centrifuge, dryer, etc.) separation/dewatering technology.

Evaluation of Sludge Sample Properties (pH, %solids, density, etc.)

Bench top tests and lab analysis of chemical pre-treatment options (polymers, flocculants, coagulants, filter aids such as DE, perlite, lime/ferric, etc.)

Bench top simulation of Belt Press, Filter Press, Centrifuge & Dryer Technologies

Evaluation of each technology and the resulting Cake Quality (dry solids, density, BTU, etc.)

Evaluation of each technology and the resulting Water/Oil Quality (TSS, BS&W, etc.)
The key to our success: Evaluation of the chemical and mechanical technology options based on their overall cost effectiveness and their ability to meet/exceed the customers specific objectives.
Downloadable Files
A detailed solids separation services specification in PDF format is available for download.
OIS_solids_separation.pdf (10.7 MB)
You will need Adobe Acrobat Reader to view that file.If you do not already have it, you can download a free copy from Adobe. To download the file, right click with your mouse and choose the "Save Target As" option.
Request More Info
Contact us to learn how your operation can benefit from ONYX solids separation services.
To learn how ONYX solids separation services benefit a particular industry, click below.
Power
Mining
Refining
Chemical
Automotive
Pulp & Paper
Metals
Additional industries served:
Pharmaceutical
Manufacturing
Food Processing
Construction
Municipal
Learn which ONYX facilities offer solids separation services from our
interactive map.
Interactive Facility Map
Copyright 2002, Onyx Industrial Services. All rights reserved.