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Pictures illustrating the setup deployed during the field trial. Picture (a) shows how the four stacks were distributed around the back of the 40-person pissoir, which comprised 2 cubicles of 5 m × 5 m. Picture (b) is a close-up of the “15-module B” stack showing the 3-module cascades and the hydraulic connections of the system. (2-column fitting figure).
