Comparing two empirical models used to predict process parameter dynamics during ozonation of synthetic dye wastewater.

Ozonation of a synthetic wastewater contaminated with acid yellow 17 dye and glucose was evaluated in a semi-batch bubble column. Data collected during this study suggests that the ozonation process removed color (represented as A400) more efficiently than chemical oxygen demand (COD) regardless of initial experimental conditions. With a 40-minute run time, the maximum A400 and COD removal efficiencies were 99.

Bench-scale ozonation study of waste activated sludge.

A bench-scale ozonation study was conducted on waste activated sludge (WAS) in a 10-L, clear PVC, semi-batch, bubble column reactor. Two separate runs were performed on 5-L samples of WAS obtained from the Rocky Creek Wastewater Treatment Plant (WWTP) in Macon, Georgia. The Rocky Creek facility uses the extended aeration activated sludge process to treat domestic wastewater.

Performance assessment of major wastewater treatment plants (WWTPs) in the state of Georgia.

A survey was conducted to report on the types and efficiencies of various treatment technologies being used at major wastewater treatment plants (WWTPs) in the state of Georgia. Twenty-four, full-scale wastewater treatment facilities with a design capacity of 37,850 m(3) d(-1) (10 Mg d(-1)) or greater were evaluated. One year of operating data for the 2003 calendar year was obtained from discharge monitoring reports (DMRs) provided by the Georgia Environmental Protection Division (EPD) in Atlanta.

Ozonation of acid yellow 17 dye in a semi-batch bubble column.

A semi-batch bubble column was used to evaluate the effect of ozonation on the removal of acid yellow 17 dye from water. Results indicate that ozonation is very effective at removing acid yellow 17 dye from synthetic textile wastewater. The ozone consumed to apparent dye removal ratio ranged from 2 to 15,000 mg ozone per mg of dye decolorized and was dependent on both ozonation time and apparent dye concentration.

Biofiltration of trichloroethylene-contaminated air: a pilot study.

This project demonstrated the biofiltration of a trichloroethylene (TCE)-contaminated airstream generated by air stripping groundwater obtained from several wells located at the Anniston Army Depot, Anniston, AL. The effects of several critical process variables were investigated to evaluate technical and economic feasibility, define operating limits and preferred operating conditions, and develop design information for a full-scale biofilter system. Long-term operation of the demonstration biofilter system was conducted to evaluate the performance and reliability of the system under variable weather conditions.

Terminal gas velocity during laparoscopy.

Study Objective: To assess the effect of port size in relation to laparoscopic gas flow and to determine the terminal velocity of gas flow during insufflation.

Design: Analysis and mathematical modeling of gas flow characteristics.

Setting: University biomedical engineering department.