Anaerobic Gas Collection Cover
Available from Industrial & Environmental Concepts Inc
The gas covers are designed to be operated at a negative pressure which eliminates fatigue cracks caused by flexing that are common in positive pressure designs. In IEC’s design, gases are continuously removed and channeled to perimeter piping where it exits the basin and can be flared or used as fuel.
A series of rainwater trenches are installed throughout the system to collect the water and enable the operator to expel water from the top of the cover. The trenches are created by strategically placing sand tubes of pre-determined size and weight in a configuration that allows rainwater to migrate to a sump enclosure where it is pumped off the cover or directly into the basin.
IEC is including floating laterals which would be welded to the bottom side of the cover. The lateral floats provide a gas flow channel system under the cover to direct bio-gas to the perimeter piping. In addition, the laterals keep the entire cover floating on the water surface, reducing the chances for wind uplift. Gas collection covers that inflate (without laterals) expose the geomembrane cover to vibration and geomembrane fatigue which significantly reduces the lifespan of the cover.
The covers are designed to be accommodate the basins to operated with water fluctuations from full to empty.