Etude des transformations du soufre dans les ouvrages de traitement d'eaux usées ou de boues : Evaluation à l'échelle de la station d'épuration avec un focus sur la digestion anaérobie
| Autor: | Forouzanmehr, Farhang |
|---|---|
| Přispěvatelé: | STAR, ABES |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Station d'épuration
Wastewater treatment plant Sulfur compound Digestion anaerobie Traitement eau usée Composé soufré Thermal hydrolysis Environment Wastewater Hydrogen sulfide (H2S) Sulfure d'hydrogène (H2S) Boue d'épuration Environnement Epuration Anaerobic digestion Eau usée Hydrolyse thermique Wastewater management [SDE.IE] Environmental Sciences/Environmental Engineering Sewage sludge ashes Purification |
| Popis: | Sulfur is an often-overlooked but key element in water resource recovery facilities (WRRFs). It undergoes biological and physicochemical conversions in the prevailing unit processes, while its emission as hydrogen sulfide (H2S) may cause odour nuisance, corrosion and have adverse effects on biogas production. Despite its importance, little information is available concerning the fate of sulfur in WRRFs, notably when it comes to full-scale and plant-wide characterization. This doctoral research work presents advancements in our understanding of characterization of total sulfur flow and sulfur transformation during wastewater treatment processes of municipal WRRFs. First, a comprehensive literature review was performed to identify potential sulfur transformations within individual unit processes of municipal WRRFs. Sulfur mass flows in a full-scale WRRF were quantified on a plant-wide level, assessing liquid, sludge and gas streams simultaneously. Besides showing the distribution of sulfur flows, this result specified key sulfur flows, process treatments, and enabled a comparison of process treatment units. Next, the transformations of sulfur species were studied in both water and sludge treatment lines. Particular attention was given to fate of sulfur species during anaerobic digestion process and the influence of thermal hydrolysis, as a sludge pretreatment process, on the fate of sulfur species during anaerobic digestion. Both full-scale and lab-scale data were used for this purpose. Overall, this work improves our understanding of sulfur transformation in WRRFs, and in particular highlights the important role of organic sulfur conversion during anaerobic digestion process, which has been widely over-looked in literature. Le soufre est un élément clé, souvent négligé, dans les stations d'epurations des eaux usées (STEP). Il subit des conversions biologiques et physicochimiques dans les procédés unitaires dominants, tandis que son émission sous forme de sulfure d'hydrogène (H2S) peut provoquer des nuisances olfactives, de la corrosion et avoir des effets négatifs sur la production de biogaz. Malgré son importance, peu d'informations sont disponibles sur le devenir du soufre dans les STEPs, notamment en ce qui concerne la caractérisation à grande échelle et à l'échelle de l'usine. Ce travail de recherche doctorale présente les avancées dans notre compréhension de la caractérisation du flux de soufre total et de la transformation du soufre pendant les processus de traitement des eaux usées des STEP. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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