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Since the bed drain / drying geotextile have shown promising results in the treatment of sludges decanters WTP in Brazil, This study evaluated this technique on prototypes and pilot scale, considering, beyond of design parameters, quantitative and qualitative aspects of the drained and pies sludge produced. Can be verified that for the sludge study, the blanket of 600 gm-2 with application rate of solids - TAS of around 3,0 kg.m-2 presented better performance. The drying phase in a pilot scale was favored, resulting in extinction of the blade 1 day and total solids content after 7 days of 18.3%, and the content of the same order of magnitude as those obtained in mechanical techniques. The toxicity test with Artemia salina for the sludge showed higher initial toxicity, indicating the effectiveness of the dewatering system.

Drenagem / secagem de lodo de decantadores de ETAs em manta geotêxtil