COHRAL™ Covered High-Rate Anaerobic Lagoon
The COvered High- Rate Anaerobic Lagoon, or COHRAL™ is a modified anaerobic lagoon-type process, but is equipped with several design features to enhance treatment performance beyond that of a traditional anaerobic lagoon. Features like expanded reaction zones, external solids/liquid separation ensure superior treatment performance and high-quality effluent from a simple treatment process.
Typically constructed as an earthen basin with a concrete ringwall at the top perimeter, COHRAL™ systems are also entirely covered by a gas collection membrane cover, designed to facilitate the gas collection, prevent odors, retain heat, and maintain optimal anaerobic conditions. Within the reactor itself, the reaction zone takes up to 90% of the lagoon while the rest of the available space serves as post-treatment digester and (pre-) settling zone.