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Meagan Daugherty

Dewatering style roll-off containers, sometimes referred to as filtering containers, create an efficient one-step process to separate solids and liquids. Ideal for several unique applications, such as water filtration, wastewater treatment plants, oil & gas, and environmental remediation, a dewatering container is built differently than a rectangular roll-off container to complete the separation process.

A dewatering liner is a type of container liner commonly used in a dewatering container, sludge box, or custom container. Different than standard plastic liners, dewatering liners are manufactured with geotextile or mesh fabric measured in microns that assist in the separation of liquids and solids. A micron, or micrometer, is defined as “a unit of length equal to one millionth of a meter” (Merriam-Webster Dictionary). The size of the microns on the dewatering liner is the key to the filtration process. The smaller the micron, the less material can get through the liner. This can be seen in Chart 1A where the liners are zoomed in to see the openings within the fabric.

Ranging in sizes available for 20-40 yard containers, with custom sizes available upon request, the three most common dewatering liners are 400 micron Knit Mesh, 250 Micron Screen Mesh, and 130 Micron Cloth. Certain sludges or contents being separated may require a different filtration level. For example, a 400 Micron Screen Mesh liner has a larger opening for thicker sludges, while the 130 Micron Cloth liner is ideal for small grit and sand mixtures. Chart 1A lists a variety of different applications that are common for each liner.

In addition to the separation process within several industries, dewatering liners have even more benefits to the operator. On-site waste minimization and avoidance of unnecessary weight resulting in cost of disposing materials at the landfill. They also act as an additional layer of protection to the steel structure of the container against caustic materials, therefore increasing your container’s longevity.

To the best of our knowledge, the information contained herein is accurate and reliable as of the date of publication. We do not assume any liability whatsoever for the accuracy and completeness of the information. This information is offered as a service and should not be construed as a recommendation and/or engineering advice. We do not assume liability whatsoever in regards to its use. The end user should determine for itself the suitability of the product(s) contained herein for the particular purpose and application to which the product(s) will be applied.