B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 90/32 (2006.01) B65D 88/34 (2006.01) B65D 88/74 (2006.01) B65D 90/38 (2006.01) C02F 1/00 (2006.01)
Patent
CA 2504060
In a covered wastewater reservoir, a gas passage is defined under the membrane cover and along the sides of the reservoir. An accumulation of bio-gases is held captive between the membrane cover and the liquid surface in a central region of the reservoir relative to the gas passage, by a flap-valve attachment condition extending between the accumulation of bio-gases and the gas passage. The new method for breaking this flap-valve attachment condition and for allowing bio-gases to flow from the accumulation of bio-gases toward the gas passage, consists of periodically and momentarily increasing a pressure in the gas passage to equal or to slightly exceed a pressure in the accumulation of bio-gases. In another aspect, the membrane cover is provided with a stiff and rough-surfaced bottom layer to facilitate the breaking of flap-valve attachment conditions when the pressure under the cover is made equal everywhere.
Degarie Claude J.
Geomembrane Technologies Inc.
P. Eng. Theriault Mario D.
LandOfFree
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