How We Build
EFI's 10-step installation process — refined over 500+ covered lagoon digesters and 30+ years of field experience.
Site Assessment & Engineering
Our team evaluates the site, lagoon dimensions, soil conditions, and system requirements. PE engineers design the complete containment system.
Subgrade Preparation
The lagoon bottom and slopes are graded to specification. Proper subgrade is critical for liner longevity.
Liner Installation
HDPE liner panels (30–100 mil) are deployed across the prepared subgrade. Each panel is carefully positioned with overlap for welding.
Seam Welding & QA Testing
Every seam is welded using wedge or extrusion welders, then destructively tested every 150 linear feet. Documented quality assurance on every seam.
Anchor Trench Construction
Liner edges are secured in anchor trenches around the perimeter, providing wind and structural resistance rated to 90+ mph.
Sludge Pipe & Gas Collection
HDPE gas collection piping and sludge removal systems are installed under the cover, enabling maintenance without ever opening it.
Baffle Installation
Floating baffles create treatment cells within the lagoon, increasing contact time and improving nutrient removal efficiency.
Cover Fabrication
Covers are fabricated in EFI’s 15,000 SF climate-controlled facility in Gaston, SC. Custom-sized panels for each project.
Cover Deployment
The floating membrane cover is deployed across the lagoon surface with ballast weight system for negative pressure operation.
System Commissioning
Flare systems (Varec 244W), blowers, control panels, and remote monitoring are connected. 24/7 cloud-based monitoring begins.
Ready to Start Your Project?
From site assessment to system commissioning — EFI handles every step. Zero cost to you. We fund 100% of capital expenditure.