Document Type


Date of Award

Fall 12-31-1979

Degree Name

Doctor of Engineering Science in Civil Engineering


Civil and Environmental Engineering

First Advisor

James R. Pfafflin

Second Advisor

Robert Dresnack

Third Advisor

Charles Franklin Peck

Fourth Advisor

Eugene B. Golub

Fifth Advisor

Howard S. Kimmel


Investigations concerning the responses of domestic wastewater treated at elevated pressures have demonstrated an acceleration in the rate of biological assimilation of the waste material. The literature is not extensive, but presents much conflicting data. There has been a lack of a coherent approach to the investigation of pressure in wastewater treatment. This demonstrates the need for standard testing apparatus and procedures.

A bench scale pressurized activated sludge process was designed and constructed. The apparatus was tested over a broad range of conditions and was found to give reproducible results. Kinetic responses of the pressurized process are presented.