| 摘要 |
PURPOSE:To rapidly complete the flocculation of floc, by adding a polymer flocculant to org. sludge to rapidly stirr sludge until a CST value reaches the min. value and, thereafter, succeeding slow speed stirring. CONSTITUTION:A polymer flocculant is added to org. sludge to perform rapid stirring until a CST (Capillary Suction Time: shows the filtering characteristics of sludge and filtering characteristics is excellent as a ST value becomes small) value reaches the min. value. Subsequently, sludge is moved to a flocculation holding tank 7 through an overflow pipe 6 and slow speed stirring is succeeded at a speed not sedimenting flocculated floc by a slow speed stirring blade 8. Thereafter, sludge is appropriately supplied to a dehydrator from a discharge pipe 9. By this method, sludge can be conditioned to an optimum state for filtering.
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