CWEA member Patrick LaBruzzo has been selected as the winner for the 2013 Water Environment Federation Student Paper Competition in the Undergrad Division. He wins $500 and the opportunity to present his poster during WEFTEC.
The WEF Student Paper Competition is intended to promote the education of
students in water pollution control, water quality problems, water-related
concerns, hazardous wastes or related areas. Additionally, it also is intended
to provide an opportunity for national recognition of students in an undergraduate
or Masters program.
Abstract: Trihalomethanes (THMs) are a disinfection by-product (DBP) formed from free chlorine and organic compounds present in water. Four THM compounds are currently regulated in drinking water by the U.S. Environmental Protection Agency (2011) and multiple methods of removal are established in the industry. Posttreatment Aeration to Reduce THMs by Ethan Brooke, published in the American Water Works Association Journal October 2011, states that spray aeration systems are a little considered but cost effective method of removing THMs (Brooke). Findings from the above research indicated future work needed to be made to make a relationship between energy and reduction in total Trihalomethane (TTHM). This paper presents the mathematical formulation of an algorithm that will perform the energy analysis of an in-tank spray aeration system (ITSAS) design. These equations relate the TTHM reduction to an energy equation with the use of a head loss to droplet size relationship for hollow cone nozzles developed by Fraser in 1956 (Iqbal). The algorithm was built into an Excel spreadsheet platform that solves for the desired flow rate using an iterative method. All of the system components may be input into the tool to develop a target operating condition to guide pump selection. Data from the selected pump may be input into the tool to find the final operating condition and TTHM removal for the design of a potential system.
Congratulations Patrick! Read his paper.