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Definition English:
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1. A sedimentation and digestion unit, generally closed with horizontal and continuos flow; its velocity and retention time must allow the sedimentation of suspended matter on the bottom where they are kept and transformed into mineralized, liquid or gaseous substances by anaerobic decomposition. 2. Ditch excavated in the ground or underground tank, where partial anaerobic decomposition of domestic sewage is promoted, through fermentation and moisture loss. (Free translation from the original: Brasil. Agência Nacional de Águas, 2014) |