초록

A method and apparatus for the treatment of the 5th Effect combined evaporator condensate generated by kraft process pulp mills. The method includes the removal from effluents of organic compounds that result in BOD,

대표청구항 ▼

[ We claim:] [1.] A method of treating condensate resulting from a pulp mill operation to obtain a first stream containing reduced contaminant levels capable of recycle and a second stream containing concentrated contaminant levels capable of being incinerated, comprising:providing a source of liqui

[ We claim:] [1.] A method of treating condensate resulting from a pulp mill operation to obtain a first stream containing reduced contaminant levels capable of recycle and a second stream containing concentrated contaminant levels capable of being incinerated, comprising:providing a source of liquid condensate containing contaminants from a pulp operation;cooling said condensate to a maximum temperature of 45.degree. C.;adjusting the pH of said condensate to about 9.5-10.4;passing said liquid condensate through a first reverse osmosis membrane to separate said condensate into first and second liquid streams, said first stream containing concentrated contaminants and the second stream containing reduced contaminant levels;recycling said second liquid stream within said pulp mill;passing said first liquid stream through a second reverse osmosis membrane to separate said first liquid stream into third and fourth liquid streams, said third liquid stream containing final stage concentrated contaminants capable of being incinerated and said fourth liquid stream containing reduced contaminant levels; andrecycling said fourth liquid stream within said pulp mill.