Dystor® Digester Gas Holder System - The Dystor® system is a digester gas holder design that uses a dome-shaped, engineered membrane system to store methane gas, provide for sludge storage and prevent odors.

Combination Heater and Heat Exchange - The PFT® Heater and Heat Exchanger insures the compatibility between the boiler, heat exchanger, and controls required for successful operation.

Pearth™ Digester Gas Mixing System - The PFT Pearth™ gas mixing system features sequential discharge which develops a variable mixing pattern in the digester.

PFT® Spiral Guided Digester Gas Holder - The PFT® Spiral Guided Digester Gas Holder rotates as it travels up and down and is suited for larger applications, typically up to 110 feet in diameter, or where unbalancing loads are probable.

PFT® Vertical Guided Digester Gas Holder - The PFT® Vertical Guided Gas Holders travel through vertical guides recessed on the rim skirt.

Duo-Deck Floating Digester Cover - The PFT Duo-Deck™, or exposed truss, digester cover design prevents the roof plate and structural components of the cover from coming in contact with the digester contents, thereby avoiding the related corrosive effects.

DuoTherm® Sludge Digestion Process - The Envirex DuoTherm® process provides municipalities the convenience of Class A biosolids and increased digester capacity, with the least possible capital and operational costs.