| 摘要 |
PURPOSE:To lower the total cost of sludge treatment by reducing the cost of a chemical agent, by controlling the addition ratio of an ionic org. high-molecular flocculant so as to adjust the colloid charge amount in a liquid after said flocculant is added to sludge to 0meq/l. CONSTITUTION:In adding an ionic org. high-molecular flocculant to sludge, the addition ratio of said flocculant is controlled so as to adjust the colloid charge amount after addition to 0meq/l, the amount to be added of the flocculant may be adjusted or the flow amount of sludge may be adjusted if there is no problem in a dehydrating process. The aforementioned method is useful as a method for controlling the addition ratio of the flocculant capable of sufficiently corresponding to the variation of sludge quality and oncn. and not only promotes the automation and labor saving of sludge treatment but also can reduce the cost of a chemical agent as compared with a conventional method.
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