Concept

Nitrification

Publications associées (55)

Direct and mediated electrochemical oxidation of ammonia on boron-doped diamond electrode

Direct (non-mediated) electrochemical oxidation of ammonia on boron-doped diamond (BDD) electrode proceeds mainly at high pH (>8) via free ammonia (NH3) oxidation. To enhance ammonia oxidation on BDD at low pH (

Elsevier2010

DENITRIFYING PAO AND GAO IN AEROBIC GRANULAR BIOFILM CULTIVATED WITH ACETATE AND PROPIONATE

Christof Holliger, David Gregory Weissbrodt, Samuel Lochmatter, Graciela Gonzalez Gil

Phosphate accumulating organisms (PAO) and glycogen accumulating organisms (GAO) play an important role in aerobic granular biofilm systems used for wastewater treatment. Both are slow growing organisms which can take up and store carbon under anaerobic co ...

2009

Comparison of the denitrification potential of aerobic granules cultivated with acetate and propionate

Christof Holliger, David Gregory Weissbrodt, Samuel Lochmatter, Graciela Gonzalez Gil

Simultaneous nitrification-denitrification has been observed in aerobic granular sludge sequencing batch bubble column reactors fed with either acetate or propionate with elimination rates of up to 60-70%. Several in-situ tests under anoxic conditions were ...

2009

Hydrazines and Azides via the Metal-Catalyzed Hydrohydrazination and Hydroazidation of Olefins

Jérôme Waser

The discovery, study, and implementation of the Co- and Mn-catalyzed hydrohydrazination and hydroazidation reactions of olefins are reported. These reactions are equiv. to direct hydroaminations of C-C double bonds with protected hydrazines or hydrazoic ac ...

2006

Antioxidant Redox Sensors Based on DNA Modified Carbon Screen-Printed Electrodes

Hubert Girault, Bin Su

Antioxidant redox sensors based on DNA modified carbon screen-printed electrodes were developed. The carbon ink was doped with TiO2 nanoparticles, onto which double- strand DNA was adsorbed. A redox mediator, namely, tris- 2,2′-bipyridine ruthenium(II) [Ru ...

2006

Glucose sensitivity through oxidation responsiveness. An example of cascade-responsive nano-sensors

Jeffrey Alan Hubbell, Nicola Tirelli, Annemie Rehor

Oxidn.-sensitive nanoparticles have been decorated with an oxidizing enzyme (glucose oxidase) for release behavior that is responsive to the presence of the enzyme substrate (glucose). [on SciFinder (R)] ...

2005

Impacts of heavy metal contamination and phytoremediation on a microbial community during a twelve-month microcosm experiment

Fabienne Gremion

The effects of heavy metals and phytoextraction practices on a soil microbial Community were studied during 12 months using a hyperaccumulating plant (Thlaspi caerulcseens) grown in an artificially contaminated soil. The 16S ribosomal RNA genes of the Bact ...

Blackwell Publishing Ltd, Oxford2004

Enhanced bromate control during ozonation: The chlorine-ammonia process

Urs von Gunten

Potentially carcinogenic bromate forms during the ozonation of bromide-containing waters. Some water treatment facilities have had to use ammonia addition and pH depression to minimize bromate formation, but these processes may prove to be insufficient to ...

2004

Monitoring and control of Gluconacetobacter xylinus fed-batch cultures using in situ mid-IR spectroscopy

Urs von Stockar, Ian William Marison, Sergio Valentinotti, Henri Kornmann

A partial least-squares calibration model, relating mid-IR spectral features with fructose, ethanol, acetate, gluconacetan, phosphate and ammonium concns. has been designed to monitor and control cultivations of Gluconacetobacter xylinus and prodn. of gluc ...

2004

Cloth catalysts in water denitrification: I. Pd on glass fibers

Fiber catalysts are easy to handle and free of mass-transfer resistance. This report is the first application of cloth catalysts to water denitrification. In this work, cloths woven from glass fibers (GF) of 7–10 mm in diameter, impregnated with Pd, were t ...

2000

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