Subventions et des contributions :

Subvention ou bourse octroyée s'appliquant à plus d'un exercice financier (2017-2018 à 2018-2019).

High-strength wastewater generated from municipal solid wastes (MSW) landfills, also known as leachates,x000D
poses a significant challenge for treatment via conventional wastewater treatment facilities. Leachate containsx000D
high amounts of organic matter, inorganic macro-components, heavy metals, and many other hazardousx000D
chemicals. High concentrations of ammonia nitrogen (AN) in leachates poses a substantial toxicity risk tox000D
adjacent surface and groundwater sources and necessitates proper treatment of these leachates to meet localx000D
standards for safe disposal or reuse. Electrochemical advanced oxidation processes (EAOP) likex000D
electro-oxidation (EO) and electro-coagulation (EC) could serve as a useful means to treat leachates originatingx000D
from MSW landfills. In EO, the direct action of electric current is used to oxidize or reduce species exclusivelyx000D
at the electrodes, which convert toxic and/or biorefractory pollutants into more benign chemicals. On the otherx000D
hand, EC involves the generation of coagulants in situ by electrically dissolving metal ions (aluminum or iron)x000D
at the anodes. These coagulants quickly form large particulate flocs, which in turn chemically adsorb pollutantsx000D
from wastewater. The combination of these two EAOPs into a single electrolytic cell is expected tox000D
demonstrate excellent potential for the removal of AN from high strength leachates. Since these processes dox000D
not require the addition of any chemicals from external sources, they can be considered as "clean" technology.x000D
The outcomes of this project will significantly add value for the company, GHD, and Canada in general. Inx000D
effect, this project aims to develop practical solutions for the treatment of high-strength leachate and preservex000D
the quality of our environment. Although existing treatment technologies easily remove the organic load fromx000D
leachate, the removal of ammonia presents a significant challenge. The proposed hybrid EO-EC system isx000D
expected to reduce a substantial portion of the ammonia and organic load from high strength leachate. Thex000D
process will also eliminate the need for chemical inputs and will enable the design of compact reactors in ax000D
small area to treat high-strength wastewater.