Wastewater discharges are one of the major sources of introduction of MPs into watercourses. While conventional wastewater treatment plants WWTPs are efficient in removing organic material and nutrients, their removal of MPs is insufficient.
Ozonation is one of the treatments that has been and continues to be used in upgrading WWTPs to fulfill the requirement of abatement of MPs. However, this chemical process leads to the formation of ozonation transformation products OTPs and ozonation byproducts OBPs , among which some are potentially toxic. This is especially relevant for WWTPs receiving considerable industrial inputs, where the profile of precursors and hence of the formed OTPs and OBPs, could be different from those encountered in WWTPs without industrial inputs, engendering stronger toxicological concerns.
In the proposed master thesis, the student will investigate the formation of genotoxic compounds during ozonation of wastewater. In brief, the student will carry out bioanalytical evaluation of laboratory- or pilot-plant-ozonated wastewater samples in order to identify genotoxic compounds and ultimately identify their precursors.
The bioanalytical strategy is based on an integrative approach that combines genotoxicity assays particularly Ames test , genotoxic sample fractionation, and chemical analysis using high-resolution mass spectrometry Orbitrap technology. In this project, the student will be able to develop multidisciplinary skills related to:. Competent candidates are those with strong interests towards multidisciplinary research in particular related to toxicology and analytical chemistry.
Contact: tarek. Keywords: Field work, native stream biofilm, artificial substrates, development of experimental setup, pesticides, pharmaceuticals, microorganisms. They have been shown to possess the ability to reduce the concentrations of chemical pollutants via e. Naturally, stream biofilms grow on rocks and pebbles, but also on any other submerged surfaces.
In order to evaluate processes, such as, e. Therefore, stream biofilms that are used for laboratory experiments are often grown on artificial substrates like, e.
Regardless, the consequences of such modifications from the natural appearance are not well investigated. Also, it is not well understood if results gained with such modified systems still can be translated back to behavior in the natural environment. This project addresses those knowledge gaps by i developing test systems that are more representative of naturally grown biofilms than the ones used so far, ii doing biotransformation experiments with the newly developed systems and iii comparing the results to a standardized testing system.
This experimental system will then be used to assess biotransformation of a mixture of environmentally relevant polar organic micropollutants. To do so, test reactors will be spiked with a set of micropollutants and the decrease of these pollutants will be monitored over time by means of high-performance liquid chromatography-high resolution mass spectrometry HPLC-HRMS.
Finally the outcomes of the different experimental setups will be evaluated i. The MSc student will learn how to properly plan and set up an experiment, will gain knowledge in sophisticated analytical methods, and learns how to handle and evaluate large chemical datasets. Advisors: Werner Desiante, Prof. It will be dangerous to use secondary treatment, which will not remove all impurities in the treated wastewater.
When these impurities are left in the treated wastewater, it will contaminate the groundwater causing health risks to humans and organisms. After wastewater is treated, it can be re-used for various functions. One of the main uses of reclaimed water is for agriculture. Treated water is re-used in irrigating crops for agricultural production. Another use of reclaimed water is domestic uses.
Reclaimed water can be re-pumped into homes to be used for domestic purposes such as washing and cooking. The use of reclaimed water for domestic use is more common because most of the wastewater originates from the homes of people living within a water municipality. The cost of re-supplying the reclaimed water to the homes is economical and far much lower than that of pumping fresh clean water from water sources.
Finally, reclaimed water can be used to replenish surface or ground water Water UK, Sydney Water Stage 3 — tertiary treatment.
Water UK. Wastewater treatment and recycling. World Bank. Introduction to wastewater treatment processes. Free unlimited revisions.
Free Work Cited. Free title page. A magneto-chemical process, known as CoMag TM , has been developed to improve coagulation and solids separation and expand upon conventional wastewater treatment techniques.
Furthermore, this dissertation evaluates the robustness of a pilot-scale hybrid solution for wastewater treatment for small communities in warm climate regions. contamination of shellfisheries. A thesis submitted to the National University of Ireland for the degree of . Disinfection technologies for wastewater treatment.
In addition, results suggest that MS2 was removed more effectively using the bench-scale model then the gpm pilot plant. Employing the bench scale model, the mean Log Reduction Value for MS2, poliovirus type 1, rotavirus strain Wa and adenovirus type 2 was 2.
Therefore, the CoMag TM process has the potential to aid wastewater and water treatment facilities meet their more stringent water quality permits. Wright, Christine N. Doctoral Dissertations.