Sediment Filter Bags
Sediment Dewatering Bags for Wastewater Treatment Plant
Question: I am looking into using sediment filter bags on a project site. I am the design engineer for the project and am looking for advice on sizing. The sediment is silty-clay, mostly. We are building an expansion to a wastewater treatment plant. The largest thing will be the oxidation ditches, which will be a huge hole in the ground. I was thinking that we might use sediment bags for dewatering. The area of the ditches will exceed 60,000 sq. feet. But I can get a more accurate number later.
Answer: Thank you for contacting Granite Environmental with your inquiry. Our TaurusSediment Filter Bags are fabricated using heavy duty needle punched filter fabric (non-woven geotextile) which provides high permittivity (water flow) and a fine pore structure that allows water to flow through freely, while preventing fine soils from piping through. Other options are woven Monofilament (polypro or PE), which are ideal for high flow, rugged, high tensile applications.
Standard Dewatering Bag Sizes are 15' x 10, 15, 20, or 25' in either an 8 oz or 10 oz non woven geotextile.
For more information on sizes and specifications, please see our Taurus Dewatering Bag Product Flyer.
Dewatering bags should be sized based on the volume of water being pumped (pump flow rate), quantity and type of sediment and the permittivity of the given bag size. Consideration should also be given to location. (Steep sloped surfaces are typically not recommended as the bag may roll). Placement may be in a 20’ drop box, dump truck or similar for containment to facilitate transportation. Each sediment bag can handle a 2”, 3” or 4” discharge hose. (The hose can be placed along any edge by making a small incision into the fabric, inserting the hose and then clamping the fabric to the hose via wire, ties, clamp, rope or similar to create a good seal.)
Learn more about Dewatering Bags.