Current Limits on Circuit Closure

The maximum re-utifization of the water employed is Hmited by the various detrimental substances in the process water. Their concentration, measured as COD concentration in the water (in ppm), increases at a disproportionate rate when 

System application Specific effluent volume/ 1 (1 paper) Disturbing effects limiting further closure 

Graphic paper grades 8-10 decreasing product quality 

Board and packaging grades 3-5 odor problems (water and product) 

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