TREATMENT OF DEINKING WASTE WATER

申请公布号：JPH10118660(A)

申请号：JP19960298164

申请日期：1996.10.22

申请公布日期：1998.05.12

申请人：

KURITA WATER IND LTD

发明人：SAEGUSA TAKASHI

分类号：C02F1/52;D21C5/02;D21C11/00;(IPC1-7):C02F1/52

主分类号：C02F1/52

摘要：<p>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 deg.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.</p>

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