Chlorine Dioxide Treatment Compositions and Processes

Abstract

The present invention relates to methods and compositions for chlorine dioxide delignification and/or bleaching processes by reacting pulp with chlorine dioxide and a peroxidase and/or a laccase.

1 . A method for delignifying and/or bleaching of a pulp, comprising reacting pulp, chlorine dioxide and a peroxidase. 
     
     
         2 . The method of  claim 1 , wherein the peroxidase is a haloperoxidase 
     
     
         3 . The method of  claim 1 , further comprising reacting the pulp with a laccase. 
     
     
         4 . The method of  claim 2 , wherein the haloperoxidase is a chloride peroxidase. 
     
     
         5 . The method of  claim 1 , wherein the peroxidase is a  Coprinus peroxidase,  a  Bacillus peroxidase,  a soy bean peroxidase or a horseradish peroxidase. 
     
     
         6 . The method of  claim 4 , wherein the chloride peroxidase is a  Curvularia inaequalis  peroxidase or  Curvularia verruculosa  peroxideas. 
     
     
         7 . A method for treating wastewater and/or sludge, comprising reacting wastewater and/or sludge, chlorine dioxide and a peroxidase. 
     
     
         8 . The method of  claim 7 , wherein the peroxidase is a haloperoxidase. 
     
     
         9 . The method of  claim 7 , further comprising reacting wastewater and/or sludge with a laccase. 
     
     
         10 . The method of  claim 8 , wherein the haloperoxidase is a chloride peroxidase. 
     
     
         11 . The method of  claim 8 , wherein the peroxidase is a  Coprinus peroxidase,  a  Bacillus peroxidase,  a soy bean peroxidase or a horseradish peroxidase. 
     
     
         12 . The method of  claim 10 , wherein the chloride peroxidase is a  Curvularia inaequalis  peroxidase or  Curvularia verruculosa  peroxidase. 
     
     
         13 . A method for delignifying and/or bleaching of a pulp, comprising reacting pulp, chlorine dioxide and a laccase. 
     
     
         14 . The method of  claim 13 , wherein the laccase is a  Tramates, Coprinus  or  Myceliophthora  laccase. 
     
     
         15 . The method of  claim 13 , further comprising reacting the pulp with a peroxidase. 
     
     
         16 . The method of  claim 15 , wherein the peroxidase is a haloperoxidase 
     
     
         17 . The method of  claim 16 , wherein the haloperoxidase is a chloride peroxidase. 
     
     
         18 . A method for treating wastewater and/or sludge, comprising reacting wastewater and/or sludge, chlorine dioxide and a laccase. 
     
     
         19 . The method of  claim 18 , wherein the laccase is a  Tramates, Coprinus  or  Myceliophthora  laccase. 
     
     
         20 . The method of  claim 13 , further comprising reacting the wastewater and/or sludge with a peroxidase.