Title:
TREATMENT OF DEINKING WASTE WATER
Document Type and Number:
Japanese Patent JP3937102
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a deinking waste water treatment method subjecting waste water discharged from a deinking process to solid-liquid separation to reutilize water and a chemical agent dissolved in water, to enable the reduction of the generation of scale and the rationalization of a process and capable of producing deinked pulp of high quality.
SOLUTION: A cationic charge adjusting agent having a quaternary ammonium salt of which the intrinsic viscosity measured at 25°C using a 1N sodium nitrate aq. soln. as a solvent is 1dl/g is added to waste water discharged from a deinking process to perform primary flocculation treatment and a polymeric flocculant is added to secondary flocculation treatment to perform solid-liquid separation.
Inventors:
Takashi Saegusa
Application Number:
JP29816496A
Publication Date:
June 27, 2007
Filing Date:
October 22, 1996
Export Citation:
Assignee:
Kurita Water Industries Ltd.
International Classes:
C02F1/52; D21C5/02; D21C11/00; (IPC1-7): C02F1/52; D21C5/02; D21C11/00
Domestic Patent References:
| JP6509741A | ||||
| JP6509742A | ||||
| JP6329708A | ||||
| JP8112504A |
Attorney, Agent or Firm:
Mitsuru Uchiyama
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