Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


In studying the effects of deinking newspapers using recycled water, I found that the suspended solids hampered the efficiency of the operation and lowered the quality of the paper being produced. Biological activity in the water also plays an important role in the water quality of the system, and thereby the paper quality. Several of the water quality tests performed showed that the contaminants in the water will reach a plateau (equilibrium) region where no significant change is noticed. This implies that a closed system should be able to tolerate a moderate build up of some contaminants and still operate efficiently and effectively; but the suspended solids and biological growth must be controlled because of their detrimental effect on the system.