79 



MARVIN ALLUM 

 are the chemical pulping processes. 



Now, this waste sample study, as I said 

 before, revealed that the most toxic components of pulp 

 and paper mill wastes are associated with the chemical 

 pulping processes. Now, interestingly enough, when the 



data for the individual waste streams were arranged by 

 dilution ratio, in other words, much as they are here, as 

 arrayed here, much as in the cases of Rayonier where the 

 strongest is first, the next strongest second and the 

 weakest last, when the data are arrayed in this fashion 

 the sulfite waste liquor values that accompany these 

 dilution ratios do not form any particular pattern. In 

 other words, the waste requiring the most dilution may or 

 may not have had the highest sulfite waste liquor value 

 associated with it. The second strongest by dilution 

 factor may or may not have had the second highest sulfite 

 waste liquor value, and so on. Now, this suggests to us 

 that either more than one toxic component exists in the 

 wastes that were tested or that the Pearl-Benson Index for 

 sulfite waste liquor does not adequately measure whatever 

 this toxic component may be. 



Almost everyone who has worked with pulp 

 mill wastes has found that the Pearl-Benson Index is some- 

 thing less than perfect. This, too, was our experience. 



