Date of Award


Degree Name

Bachelor of Science


Paper Science and Engineering


The problem of disposal of high ash papermill sludges has yet to be resolved. High temperature, high pressure wet air oxidation may have the potential to fill this gap in our technology.

A sample of high ash primary sludge was obtained, thickened, wet air oxidized, purified, and evaluated for brightness and abrasiveness. The product was grossly discolored with iron oxide. However, removal of the oxide yielded a high brightness product with low abrasiveness. This product appeared to be well suited for use as a filler material.

In order for this process to be acceptable as a method for obtaining a reusable product from high ash papermill sludge, it will be necessary to keep the iron oxide out of the product.