A master thesis from Aalborg University
Effects of increased wastewater discharge - Hjørring wastewater treatment plant
Author(s)
Term
4. term
Publication year
2020
Submitted on
2020-06-08
Pages
123 pages
Abstract
The Master thesis deals with effects of increased wastewater loading on Hjørring Wastewater Treatment Plant and the interactions between long force mains in the sewer system and wastewater treatment processes. The goal of the thesis is to investigate both, positive and negative, effects of this increase. The Master thesis is carried out in several steps. First, the wastewater influent is characterized in terms of composition and biodegradability. This includes volatile fat acids (VFA) measurements on wastewater samples, which were done in the laboratory. Furthermore, respirometry experiments were carried out to measure oxygen uptake rate (OUR). The aim of this is to characterize the wastewater organic matter composition, that accounts for possible sulfide formation and investigate sulfide abatement methods. For this case two experimental wastewater treatment reactors were constructed. In addition, negative impacts of sulfide generation in the sewer system were quantified by placing an odor sensor at the inlet to the wastewater treatment plant (WWTP) to measure volatilized sulfides. Laboratory data serves as a basis for setting up models describing wastewater transformations. Models were used to simulate wastewater transformations with wide array of parameters. Sulfide abatement methods were implemented into mathematical models to investigate possible sulfide control methods that would be applicable in the site of the thesis. Monte Carlo simulations were carried out to account for uncertainties. After laboratory experiments, measurement campaign and simulations were completed, results were discussed in a report and conclusions were drawn. Visual abstract above illustrates workflow throughout this master thesis.
Documents
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