Weighted Walnut Wattle
REM Weighted Walnut Wattle™ – The Weighted Walnut Wattle™ provides industrial & manufacturing operators, commercial property owners, municipal employees and construction personnel with a method of significantly reducing urban water runoff pollution. The Weighted Walnut Wattle™ can be placed and physically configured at key locations throughout a site, with the intent of capturing/filtering the water that runs off your project. Typically, the filters are placed at the point on your site where water runs off into the street or into a storm drain. The filters are flexible and will conform to almost any landscape geometry and can be configured in multiple shapes including U shapes and circles.
Weighted Walnut Wattle
Technical InfoThe Weighted Walnut Wattle™ is an effective and economical “Best Management Practice” (BMP) component in an organization’s “Storm Water Pollution Prevention Plan” (SWPPP).
The Weight Walnut Wattle™ is engineered for efficient filtration and durability in difficult environments. The unique Walnut Wattle housing contains a natural, 100% biodegradable filter media. The design allows for the collection of sediment, debris, and other pollutants from runoff water in two ways: First, the filter slows the speed of the runoff water creating a ponding or dam effect. When runoff water is slowed by ponding, suspended solids sink to the bottom of the pond for collection after the flow event. Secondly, the walnut media and the Wattle housing provide a sieve filter affect.
The Wattle housing is manufactured using a state-of-the-art weaving technology, which provides a rugged fabric with unique water flow and filtration characteristics (See fig 1.). Contained within the housing is a 100 percent biodegradable filtration media. The media consists of randomly shaped walnut shells (See fig 2.). When compacted together walnut shell has excellent filtration characteristics. The random shapes and larger surface area provide millions of entrapment zones for containment of suspended solids such as sediment and debris.
An additional benefit of using walnut shell is the relatively low environmental impact at disposal versus filter media made from synthetic materials. Walnut shell is dense material that maintains shape and structural integrity. The density provides significant weight allowing the Wattle to stay in place while avoiding floating during flow events.
Walnut shell resists the absorption of moisture resulting in reduced natural decay and quick drying. Weighted Walnut Wattles weigh approximately 4 to 6lbs. per linear foot.