Dewatering Filter Bags
Question: I am looking for dewatering filter bags that I can use around my construction site to filter out silt and sediment materials. Would it be possible to place these bags in a 20 yd. dumpster? What sizes are available?
Answer: For filtration of sediment, silt and other materials, the most commonly used product is our Dewatering Silt Bags. These bags are constructed with an outer nonwoven filter fabric that allows water to slowly drain out of the bag while sediment, silt and other materials are retained inside the bag. In terms of placement, bags can be used in several different locations include the following:
- Dump Trucks
- Construction Sites
- Drop Boxes
- Trailers and Dumpsters
- Flat Areas
- Pond Banks
- Hay Bales
As seen in the list above, these bags an be easily used in dump trucks, drop boxes and other locations where filled bags can be easily transported.
Dewatering Bag Construction and Filtration
The construction of a dewatering bag includes the use of either an 8 oz. or 10 oz. nonwoven geotextile filter fabric. These fabrics are designed to filter out materials at various filtration levels depending on the strength of fabric. The 8 oz. material will typically offer a starting filtration level of 80 gpm, while the 10 oz. material can filter at a rate of 60 gpm. Standard sizing includes the following:
- 6' x 6': 1.44 cubic yds./bag
- 15' x 10': 6 cubic yds./bag
- 15' x 15': 9.6 cubic yds./bag
- 15' x 20': 12 cubic yds./bag
- 15' x 25': 15 cubic yds./bag
Custom sizing for the dewatering bags is also available, so please do not hesitate to ask.
Filter Bag Placement
Placement for the dewatering filter bags can include anything from construction site edges to dump trucks. Placement of the bags on items such as hay bales or other aggregates can help to increase efficiency and filtration levels on your site. To provide the highest level of filtration, bags should always be placed on a flat and level area.