Cover for a Segmented Biogas Reservoir

A segmented cover for a wastewater reservoir comprising:

• juxtaposed cover segments;
• floating beams defining each of said cover segments, and
• a floating membrane removably mounted to said floating beams over each of said cover segments;
• each of said floating beams comprising floating boxes mounted end to end;
• each of said floating beams being wrapped in a sealed tubular envelope and all of said tubular envelopes being joined together defining a sealed gas-passage network;
• and
• said gas passage network being ballasted with wastewater from said wastewater reservoir, and being open to a gas accumulation region under one of said floating membranes.

A wastewater reservoir having floating scum at the surface thereof

• and a segmented cover mounted there-over, said segmented cover comprising:
• juxtaposed cover segments;
• floating beams defining each of said cover segments, and a floating membrane removably mounted to said floating beams over each of said cover segments;
• said floating beams defining each of said cover segments comprising a pair of short beams and a pair of long beams;
• each of said long beams having a keel thereunder;
• said long beams being held laterally firm in a parallel relationship with each other by an engagement of said keels in said scum.

A method for installing a flexible floating membrane over a wastewater reservoir and for connecting said flexible floating membrane to a biogas outlet pipe mounted fixed above said flexible floating membrane, comprising the steps of:

• affixing a sealing plate on an opening in said flexible floating membrane;
• mounting a flange to said outlet pipe;
• mounting lifting hooks to said sealing plate;
• hoisting said lifting hooks and said sealing plate to said flange, and
• bolting said flange to said sealing plate.