“There is a 100-mil, resin-rich, highly corrosive resistant inner liner, followed by a glass-rich structural layer,” Malki says. For the final stage, the craftsmen apply a pigmented gel coat with UV inhibitors for aesthetics and for defense against sunlight over time.

This rectangular biotrickling filter is loaded on a truck and ready for delivery to a water reclamation plant in Lubbock, Texas.

This rectangular biotrickling filter is
loaded on a truck and ready for delivery to a
water reclamation plant in Lubbock, Texas.

Malki says that high-tech composite structures are replacing traditional concrete and metal systems because of the corrosive nature of the wastewater treatment process. Unlike concrete structures, which often require relining within 10 years, the BTF will last 50 years or more with little required maintenance except an occasional coat of paint. It’s also easy to modify FRP systems when a plant needs to make changes.

The bio-organism filter is a good solution for wastewater and sewer treatment facilities looking for a green method of odor control, adds Malki. “The BTF is an almost maintenance-free, chemical-free, very safe and very eco-friendly means to get rid of some very noxious streams of pollutants that can be encountered when you’re dealing with sewer and wastewater treatment plants.”