Passive Sludge Dewatering

The absolute best way to reclaim valuable materials

We use geotextile bags (filter bags) for passive sludge dewatering interventions. This option creates a low maintenance and
cost effective solution that can remove more water from contaminated material and sediment that already exists in treatment
ponds, tailings ponds, stormwater management ponds (SWMPs), and industrial lagoons – allowing you recoup valuable
materials that may have been missed in previous operations.

Protect the environment

Containment of solid material in geotextile bags means contaminants are removed from the surrounding environment for safe disposal.

Lower disposal costs

Since we produce a higher rate of solid material when dewatering, this ensures you’re only trucking away and disposing of contaminated solids and not excess water.

Flexible disposal timelines

Geotextile bags provide you with a long term storage solution for material containment.


Filter bags are made from a specially engineered textile made from high tenacity polypropylene or polyester yarns, which are woven into a stable network that retains their relative position. This material is inert to biological degradation and resistant to naturally found chemicals, alkalis, and acids.

To ensure optimal dewatering, a polymer solution is injected into the sludge being pumped into the bags. The polymers connect with solid particles and draw them away from the water molecules. As the sludge pushes into the bags, the water escapes through the bag’s exterior filter, while the sediment is contained. The bags decant for several weeks to ensure maximum dewatering.


We’ve built an international reputation for providing dependable, versatile solutions that
protect aquatic ecosystems, while keeping projects on time and on budget.

Let us know what matters most to you.