Date of Award

2023

Document Type

Open Access Master's Thesis

Degree Name

Master of Science in Environmental Engineering (MS)

Administrative Home Department

Department of Civil, Environmental, and Geospatial Engineering

Advisor 1

Jennifer G. Becker

Committee Member 1

Eric A. Seagren

Committee Member 2

David W. Watkins

Abstract

An aerated lagoon wastewater treatment facility (WWTF) was modeled using BioWin wastewater treatment simulation software. Comprehensive model sensitivity analysis and wastewater characterization throughout the treatment train were performed for model calibration. Two separate calibrated models were necessary to accommodate the large seasonal variations in flow and loading experienced at the WWTF. Dynamic models using variable volume modeling elements to represent the WWTF’s two lagoons were most effective for predicting lagoon performance. The calibrated models were generally able to accurately predict trends in nitrogen, phosphorus, chemical oxygen demand levels and speciation throughout the treatment train and in the effluent. Both models struggled to accurately predict accumulation and removal of solids in the system due to the complex solids removal processes which occur in lagoons. Sludge impacts were assumed to be negligible in modeling, and the lagoons were modeled as completely mixed reactors. Both assumptions were verified via comprehensive lagoon profiling.

Available for download on Thursday, December 31, 2026

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