40 Years of Simple, Proven Sludge Dewatering
Gravity-driven filter beds that dewater sludge in days — not weeks. No moving parts, no high energy costs, no complexity.
Years in Business
of Installations
Product Lines
Manufactured
Why GFSS?
No Moving Parts
Gravity does the work. Zero motors, zero mechanical wear.
Days Not Weeks
Typical sludge dewaters to liftable state in 2–5 days.
Minimal Maintenance
Wash down with a hose. No special skills or tools required.
Low Energy Costs
Only auxiliary pumping and polymer equipment needed.
Sound Familiar?
- Our sand drying beds are too slow and take up too much space.
- We need to accept vacuum truck waste but don’t have a receiving facility.
- We can’t afford the energy costs of mechanical dewatering equipment.
- We need dewatering capacity but have a very limited footprint.
GFSS has been solving these exact problems for municipal and industrial operators since the 1970s. Our gravity-driven systems are engineered for simplicity, reliability, and a footprint that fits your site — not the other way around.
See How We Help →Our Products
Wedgewater™ Stainless Steel Filter Bed
The original gravity dewatering system — 50 years of proven stainless steel wedgewire performance.
Wedgewater™ Polyurethane Filter Media
Interlocking polyurethane tiles — economical, corrosion-proof, practically indestructible.
Wedgewater™ Sieve
Durable wedgewire screening for solids separation in municipal and industrial applications.
Lateral Flow™ Decant System
Remove liquids laterally for superior sludge thickening — no moving parts.
Vacuum-Truck Waste Bed
Engineered receiving and dewatering for septage and vacuum truck waste.
Industries We Serve
Municipal Wastewater Treatment
Industrial Process Wastewater
Septage & Vacuum Truck Receiving
Lagoon Sludge Management
Potable Water Treatment
Trusted Across the Country
“The Wedgewater™ system transformed our biosolids program. We dewater in days instead of weeks — and maintenance is just a hose down.”
Municipal WWTP
Colorado — Wedgewater™ Filter Bed Installation
“We retrofitted our existing concrete beds with polyurethane media and cut our cycle time in half. The ROI was immediate.”
Industrial Facility
Texas — Polyurethane Media Retrofit
“Our vacuum truck waste bed handles multiple loads a day with zero issues. Simple, durable, and exactly what we needed.”
County Wastewater District
California — Vacuum-Truck Waste Bed
Resources & Insights
Wedgewater Filter Beds vs. Sand Drying Beds: A Complete Comparison
Comparing Wedgewater™ stainless steel filter beds to traditional sand drying beds — dewatering speed, footprint, maintenance, lifecycle cost, and when each makes sense.
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How to Size a Sludge Dewatering Filter Bed for Your WWTP
Practical sizing guidance for wastewater treatment engineers — daily sludge volume, loading rates, cycle time, and bed count calculations for gravity dewatering filter beds.
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Understanding 40 CFR Part 503: A Plain-Language Guide for WWTP Operators
A practical, plain-language breakdown of EPA 40 CFR Part 503 biosolids regulations — what they require, who they apply to, and how to stay in compliance at your treatment plant.
Read Article →