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Lecture

Wastewater Treatment II

In course

ENV-167: Introduction to environmental engineering

Key themes in environmental science and engineering will be show-cased, with examples - from equator to the poles - including atmospheric processes and climate change, water quality, energy resources and urban development, with the amazing technologies use ...

Description

This lecture covers the advanced topics in wastewater treatment, focusing on the biochemical oxygen demand, oxygen-demanding wastes, chemical precipitation of phosphate, biological phosphate removal, and the impact of oxygen-demanding wastes on rivers. It also discusses the post-denitrification process, biological nitrogen removal, and the newest developments in biological phosphate removal. The lecture concludes with a summary of the wastewater treatment process and the challenges posed by micropollutants in the aquatic environment.

Instructors (5)

Christof Holliger

Originaire d'Adliswil, Christof Holliger est né en 1959. Diplômé de l'ETHZ en biologie en 1984, il mène des travaux de recherche dans le domaine de la microbiologie environnementale à l'Université d'Agriculture de Wageningen (Pays-Bas) où il obtient son doctorat en Science de l'environnement en 1992. En 1992, il retourne en Suisse engagé comme collaborateur scientifique et chef de groupe à l'Institut Fédéral pour l'Aménagement, l'Epuration et la Protection des Eaux (EAWAG) à Kastanienbaum. Il y continue ses recherches sur la déchloruration réductrice, commencées aux Pays-Bas, et dirige des travaux sur la réduction des composés nitroaromatiques, la réduction du fer et la méthanogenèse psychrophile dans les sédiments des lacs. En octobre 1998, il est nommé professeur assistant en biotechnologie environnementale au Département de génie rural de l'EPFL. Ses recherches visent l'application des micro-organismes anaérobies pour le traitement des eaux résiduaires. En novembre 2004, il est nommé professeur associé et devient responsable du laboratoire de biotechnologie environnementale à la Faculté de l'Environnement naturel, architectural et construit. L'utilisation des techniques de la biologie moléculaire pour la caractérisation des communautés microbiennes impliquées dans le biotraitement de l'air, des eaux et des sols pollués est un outil clé dans les différents projets de recherche visants le développement des nouveaux procédés de traitement.

Anders Meibom

Anders Meibom obtained his PhD in physics from the University of Southern Denmark in 1997. This was followed by two and a half years of PostDoc work at the Hawaii Institute for Geophysics and Planetology, where he conducted mineralogical studies of primitive chondritic meteorites. From 2000 to 2005, he was Research Associate in the Geological & Environmental Sciences, Stanford University, where he represented Stanford in the USGS-Stanford ion microprobe laboratory. In 2005, he became proifessor at the Muséum National dHistoire Naturelle in Paris. From 2006 to 2011 he was the director of the French national NanoSIMS laboratory. Since January 2012, he is professor at the EPFL in the School of Architecture, Civil and Environmental Engineering (ENAC). From April 2014, he is professor ad personam at the Institute of Earth Sciences, University of Lausanne.

David Andrew Barry

Research InterestsSubsurface hydrology, constructed wetlands, ecological engineering, in particular contaminant transport and remediation of soil and groundwater; more generally, models of hydrological and vadose zone processes; application of mathematical methods to hydrological processes; coastal zone sediment transport, aquifer-coastal ocean interactions; hydrodynamics and modelling of lakes.

Official source

Ontological neighbourhood

Environmental science

Pollution: Water pollution

Related concepts (32)

Sewage treatment

Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable to discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. Sewage contains wastewater from households and businesses and possibly pre-treated industrial wastewater. There are a high number of sewage treatment processes to choose from.

Secondary treatment

Secondary treatment (mostly biological wastewater treatment) is the removal of biodegradable organic matter (in solution or suspension) from sewage or similar kinds of wastewater. The aim is to achieve a certain degree of effluent quality in a sewage treatment plant suitable for the intended disposal or reuse option. A "primary treatment" step often precedes secondary treatment, whereby physical phase separation is used to remove settleable solids.

Industrial wastewater treatment

Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater (or effluent) may be reused or released to a sanitary sewer or to a surface water in the environment. Some industrial facilities generate wastewater that can be treated in sewage treatment plants.

Wastewater treatment

Wastewater treatment is a process which removes and eliminates contaminants from wastewater and converts this into an effluent that can be returned to the water cycle. Once returned to the water cycle, the effluent creates an acceptable impact on the environment or is reused for various purposes (called water reclamation). The treatment process takes place in a wastewater treatment plant. There are several kinds of wastewater which are treated at the appropriate type of wastewater treatment plant.

Biochemical oxygen demand

Biochemical oxygen demand (also known as BOD or biological oxygen demand) is an analytical parameter representing the amount of dissolved oxygen (DO) consumed by aerobic bacteria growing on the organic material present in a water sample at a specific temperature over a specific time period. The BOD value is most commonly expressed in milligrams of oxygen consumed per liter of sample during 5 days of incubation at 20 °C and is often used as a surrogate of the degree of organic water pollution.

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Wastewater Treatment: Nutrient Removal

Explores biological nutrient removal and chemical phosphorous removal in wastewater treatment plants, emphasizing denitrification and phosphate removal methods.

Wastewater Treatment I

Explores wastewater treatment principles, BOD removal efficiency, and typical pollutant concentrations.

Biological Nutrient Removal: Nitrogen and Phosphorus

Explores biological nutrient removal in wastewater treatment, covering nitrogen and phosphorus removal, activated sludge process, nitrification, denitrification, and phosphorus recovery.

Wastewater Treatment: Nutrient Removal Strategies

Covers effluent analysis, dephosphatation design, and WWTP dimensioning using various treatment strategies.

Anaerobic Wastewater Treatment