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Makers of OilSorb™ and Other State-of-the-Art Filtration Media
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Technical Advisory #7 BIOMIN’S “TIP OF THE MONTH”: TO BACKWASH OR NOT IN AN OILSORB™ VESSEL In the majority of operations, backwashing is not done. Initially, if the initial pressure drop is greater than 0.5 psi/ft of bed, you might suspect the presence of fines. If you desire, you can backwash at a rate of 6-10 gpm/ft2 which results in a bed expansion of 15-20%. Make sure there is sufficient straight side above the bed to allow for this expansion so media is not lost. The backwash water should be properly disposed of in accordance with local practice. During operation in an OilSorb™ unit you can get a pressure buildup due to (1) a build-up of suspended solids on the top of the bed and/or (2) the swelling of the OilSorb™. If suspended solids are expected to be present in the influent stream, it is recommended that a filter of appropriate micron size be installed prior to the OilSorb™ unit. If this is not done, the unit can be backwashed, at the above stated rates, if part of the pressure buildup is suspected to be due to fines accumulation. When the pressure drop increases by 10-15 psig, this is normally due to swelling of the OilSorb™, the top 4-6 inches of the bed should be removed. This is accomplished by opening the top manway, which should always be provided, and either removing the OilSorb™ manually or by using a vacuum device. The following information is available on request (see link on the left navigation bar): 1.) A description and example of pressure drop curves for OilSorb™. 2.) A guide for emulsion breaking. 3.) A “Disposal Guide” 4.) An “Operation Guide” 5.) A report (on CD) about “Oils Found in Wastewater: What are they?” 6.) A slide presentation on Organoclay (on CD) |
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Biomin, Inc. P.O. Box 20028 Ferndale, MI 48220 Phone: 248-544-2552 Fax: 248-544-3733 E-Mail: biomin@aol.com See Master Mind Marketing Inc with questions or comments regarding this web site.. |
