Concept

Floculation

Publications associées (70)

Observation of ion coalescence in Orbitrap Fourier transform mass spectrometry

RATIONALE Similar to other mass spectrometric technologies based on ion trapping in a spatially restricted area, the performance of Orbitrap Fourier transform mass spectrometry (FTMS) is affected by the interaction between the trapped ion clouds. One of th ...

Wiley-Blackwell2012

Solution viscosity and flocculation characteristics of linear polymeric flocculants in various media

Jutta Christine Wandrey, David Hunkeler

Rheological characteristics of linear copolymers of acrylamide (AM) and acryloyloxyethyltrimethyl ammonium chloride (Q9), differing in molar mass and chemical composition, have been studied in distilled water (DW) and industrial water (IW) obtained from a ...

2011

Improved amorphous/crystalline silicon interface passivation by hydrogen plasma treatment

Christophe Ballif, Antoine Descoeudres, Stefaan De Wolf, Loris Barraud, Benjamin Strahm, Jakub Holovsky, Johannes Peter Seif, Bénédicte Demaurex

Silicon heterojunction solar cells have high open-circuit voltages thanks to excellent passivation of the wafer surfaces by thin intrinsic amorphous silicon (a-Si:H) layers deposited by plasma-enhanced chemical vapor deposition. We show a dramatic improvem ...

2011

Flocculation by Cationic Polyelectrolytes: Relating Efficiency with Polyelectrolyte Characteristics

Jutta Christine Wandrey, David Hunkeler

A series of acrylamide/dimethylaminoethylacrylate methyl chloride copolymers (AM-co-DMAEA) was evaluated as flocculants for model Precipitated Calcium Carbonate (FCC) in distilled water. These cationic polyelectrolytes (PEL) differed by their AM/DMAEA rati ...

Wiley-Blackwell2010

MICROBIAL AND BIOMOLECULAR HETEROGENEITY OF AEROBIC GRANULES WITHIN A SINGLE BIOREACTOR ?

David Gregory Weissbrodt, Samuel Lochmatter

Aerobic granulation is considered as a promising alternative to conventional activated sludge in biological wastewater treatment. Instead of forming flocs the bacterial communities aggregate to dense granular biofilms. In the present study, granules were c ...

2010

The carbon source governs the population dynamics of phosphate accumulating organisms in aerobic granules

Christof Holliger, Olivia Zanoletti, Samuel Lochmatter, Graciela Gonzalez Gil

Aerobic granules are quasi-spherical biofilms mainly composed of self-immobilized mixed microbial communities. The application of aerobic granules to treat domestic and low-strength industrial wastewaters is gaining attention because granules can accommoda ...

2010

Inactivation of MS2 coliphage in Fenton and Fenton-like systems: role of transition metals, hydrogen peroxide and sunlight

Tamar Kohn, Andrzej Sienkiewicz, Jessica Ivana Nieto Juarez

The inactivation of coliphage MS2 by iron- and copper-catalyzed Fenton systems was studied to assess the importance of this process for virus inactivation in natural systems and during water treatment by advanced oxidation processes. The influence of H2O2 ...

American Chemical Society2010

Advanced surface derivatization of superparamagnetic iron oxide nanoparticles in a fixed bed magnetic reactor for bio-application

Jatuporn Salaklang

There is an enormous interest in exploiting nanoparticles in various biomedical applications since their size scale is similar to that of biological molecules (e.g., proteins, DNA) and structures (e.g., viruses and bacteria). As the field continues to deve ...

EPFL2009

Arsenic sequestration by sorption processes in high-iron sediments

Janet Gordon Hering

High-iron sediments in North Haiwee Reservoir (Olancha, CA), resulting from water treatment for removal of elevated dissolved arsenic in the Los Angeles Aqueduct system, were studied to examine arsenic partitioning between solid phases and porewaters under ...

2007

Confinement-induced liquid ordering investigated by x-ray phase retrieval

Hairun Guo, Christian David

Using synchrotron x-ray diffraction, we have determined the ensemble-averaged density profile of colloidal fluids within confining channels of different widths. We observe an oscillatory ordering-disordering behavior of the colloidal particles as a functio ...

2007

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