FLOCCULANT FOR TREATING WASTE WATER, AND METHOD FOR FLOCCULATION TREATMENT OF WASTE WATER

WIPO Patent Application WO/2016/158632

A1

It becomes possible to achieve an effective flocculation treatment of waste water such as colored waste water discharged from food/beverage production factories, chemical factories and the like and having chromaticity resulting from soluble COD to thereby produce high-quality treated water having satisfactorily reduced chromaticity. A flocculant for treating waste water, comprising poly(aluminum chloride) having a degree of basicity of less than 50% and a dimethyl diallyl ammonium chloride-type polymer. A method for the flocculation treatment of waste water, comprising adding the flocculant for treating waste water to waste water such as colored waste water. It is possible to reduce the amount of the flocculant to be added to the waste water, and it is also possible to reduce the amount of corrosive ions to prevent the corrosion of a water discharge facility, and it is also possible to reduce the amount of flocculated sludge produced. By using poly(aluminum chloride) having a degree of basicity of as low as less than 50%, the pH value of the flocculation-treated water can fall within a nearly neutral range and therefore the use of a neutralizing agent becomes unnecessary or the amount of a neutralizing agent to be added can be reduced.

LI ZHENGGUO (JP)
MUGIBAYASHI YASUHIRO (JP)
HIRAO TAKANORI (JP)

PCT/JP2016/059291

October 06, 2016

March 24, 2016

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KURITA WATER IND LTD (JP)

B01D21/01; C02F1/52; C02F1/56

JPH06182350A	1994-07-05
JP2002143607A	2002-05-21
JP2001149702A	2001-06-05
JPS49127468A	1974-12-06
JPS4943477A	1974-04-24
JPH06182355A	1994-07-05
JP2006007208A	2006-01-12

SHIGENO, Tsuyoshi et al. (JP)
Takeshi Shigeno (JP)

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