| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for treating waste water, in which the amount of an inorganic flocculant to be used is reduced to obtain water having excellent quality when waste water is treated by using the inorganic flocculant, an organic coagulant and a polymer flocculant. <P>SOLUTION: The method for flocculating waste water includes the steps of: adding the inorganic flocculant to the waste water; adding the dialkylaminoalkyl(meth)acrylate-based coagulant having 1.0-3.0 dl/g intrinsic viscosity to the inorganic flocculant-added waste water and performing primary flocculation; further adding the polymer flocculant to primarily-flocculated waste water and performing secondary flocculation; and subjecting the secondarily-flocculated waste water to solid-liquid separation. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
