Keywords

Eola, Lake (Fla.), Urban runoff, Water -- Purification, Chemical coagulation (alum, ferric chloride, lime), Phosphorus removal (total phosphorus), Total suspended solids (TSS) removal, Settling column detention time effects, Regression-based isoconcentration modeling

Abstract

Lake Eola, in downtown Orlando, was the subject of extensive research to determine the impact of stormwater runoff to the lake and possible management alternatives. The focus of this research was stormwater treatment by chemical coagulation followed by detention. Phosphorus was the main parameter targeted for removal. Various chemical parameters were also evaluated included: TSS, VSS, NVSS, COD, TKN, NH3, TOC, TP, Ca, As, Cd, Cu, Cr, Ni, Mg, Zn, Fe, and Pb. The chemical coagulants used for this research included: alum, ferric chloride, and lime. The study involved settling column tests for the various treatment methods to determine stormwater settling characteristics and pollutant removal rates by depth and time. Detention of the runoff in the column for 120 minutes resulted in average removal rates of 55% for TSS and 30% for TP. Both alum and ferric chloride coagulation followed by 60 minutes of settling resulted in average removal rates of over 90% for both TSS and TP. Lime coagulation followed by 60 minutes of settling resulted in over 50% removal for both TSS and TP. Regression analysis was used to develop equation relating pollutant removal with time and settling velocity. Isoconcentration lines were also developed to predict pollutant removal rates for specific parameters.

Notes

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Graduation Date

Fall 1980

Advisor

Taylor, James S.

Degree

Master of Science (M.S.)

College

College of Engineering

Degree Program

Engineering

Format

PDF

Pages

146 pages

Language

English

Rights

Public Domain

Length of Campus-only Access

None

Access Status

Masters Thesis (Open Access)

Identifier

DP0013334

Subjects

Urban runoff--Research; Water--Purification--Coagulation--Testing; Settling basins--Testing; Urban runoff--Statistical methods; Water chemistry--Research

Accessibility Status

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