Journal of Coastal Zone Management

Modeling Escherichia coli die-off rate in submarine outfall systems

3^rd International Conference on Coastal Zones and Oceanography

May 18-19, 2018 Singapore

Miguel De Luque Villa and Daniel Robledo Buitrago Ing

University of Cundinamarca, Colombia

Posters & Accepted Abstracts: J Coast Zone Manag

Abstract:

Submarine outfall systems have been presented as a problem solution for domestic wastewater in coastal cities, due to their design facilities and costs. In this study, the application of a mathematical model to predict the effects of the light intensity, salinity and volumetric ratio variables of the mixture of wastewater and seawater in Escherichia coli die-off rate on ocean was evaluated. The relationship between the variables mentioned above was established through the MATLAB software, performing laboratory tests established in a rotable experimental design. Under each combination of factors, the concentration of Escherichia coli was measured at the start of each experiment and every half hour in a total period of two hours using the membrane filtration method of standard methods. The results of the tests were statistically analyzed through a stepwise regression, where the mathematical expression was found that allowed to relate the three factors mentioned with the output variable (Escherichia coli die-off rate). This model serves as a tool to predict Escherichia coli die-off rate of any submarine outfall on the planet. miguel_deluque@yahoo.com