Detail of a well drill Well perforation works Detail of the biogas collection well
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Biogas is collected by a capturing and collecting system made up of more than 150 wells, spread out over the controlled disposal site's surface area, which have an inner diameter of 0.16 m and an average depth of 20 m. The area of influence of each of these wells extends to a radius of at least 25 m. Each of the wells has probes adapted for sample taking, inline valves, etc., which make it possible to characterise the captured gas and connect or disconnect from the general capturing network according to the composition of the gas. Of this group of wells, 43 are located in the areas that have already been restored (areas 1 and 2) and the rest are in the closed area (area 3) and the still active area (area 4).
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