Lei Zhao

Date of Award


Degree Name

Master of Science


Chemical and Paper Engineering


Paper Engineering, Chemical Engineering and Imaging

First Advisor

Dr. Raymond L. Janes

Second Advisor

Dr. Ellsworth H. Shriver

Third Advisor

Dr. Raja G. Aravamunthan

Access Setting

Masters Thesis-Open Access


The application of the reverse osmosis process for treatment of preclarified deinking effluent was studied for its efficiency and capacity to remove the total suspended and dissolved solids. Seven coagulants and flocculents were studied in the pretreatment to determine the best coagulant. Two variables, temperature and coagulant dose, were studied to determine the optimum conditions. For the reverse osmosis treatment, two types of thin film composite membranes, sea water and brackish water were used in the research. A set of orthogonal experiments and regression analyses were conducted to study the effects of pressure, temperature, feed concentration, and feed pH on permeate flux and solute percent rejection. The optimum operation conditions were determined according to the factor effect study. The relationships between feed recovery ratio and permeate flux, permeate concentration and feed concentration were studied to determine the optimum recovery ratio. Comprehensive water analyses of components were conducted to determine the component removal efficiency at each stage. The treatment process had greater than 95% removal ratio for IDS, TSS, turbidity, BOD, COD, TOC and metal elements. The treated water could be reused as high quality water in the process.