scholarly journals Humic Substances Mediate Anaerobic Methane Oxidation Linked to Nitrous Oxide Reduction in Wetland Sediments

2020 ◽  
Vol 11 ◽  
Author(s):  
Edgardo I. Valenzuela ◽  
Claudia Padilla-Loma ◽  
Nicolás Gómez-Hernández ◽  
Nguyen E. López-Lozano ◽  
Sergio Casas-Flores ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Humic Substances ◽  
Methane Oxidation ◽  
Anaerobic Methane Oxidation ◽  
Oxide Reduction ◽  
Nitrous Oxide Reduction

Release of nitrous oxide (N2O) from denitrifying activated sludge caused by H2S-containing wastewater: quantification and application of a new mathematical model

1998 ◽  
Vol 38 (1) ◽  
pp. 237-246 ◽  
Author(s):  
Barbara Schönharting ◽  
Ruxandra Rehner ◽  
Jörg W. Metzger ◽  
Karlheinz Krauth ◽  
Manfred Rizzi
Keyword(s):  
Mathematical Model ◽  
Nitrous Oxide ◽  
Hydrogen Sulfide ◽  
Activated Sludge ◽  
Sulfide Concentration ◽  
Oxide Reduction ◽  
Strong Inhibition ◽  
Wide Range ◽  
Nitrous Oxide Reduction ◽  
Denitrification Process

A new mathematical model is presented which describes the denitrification process by dynamic material balance equations. In this approach the kinetic rate expressions of the single denitrification steps and the observed strong inhibition of nitrate on nitrite and nitrous oxide reduction are based exclusively on fundamental enzyme kinetics. This allows a prediction of the denitrification process in a wide range of wastewater-relevant nitrate concentrations. The model was successfully applied to the description of the kinetic behavior of a standardized denitrifying activated sludge system. Furthermore the experimentally investigated influence of hydrogen sulfide was quantified by extending the model with a non-competitive inhibition mechanism involving all steps of the denitrification process. The inhibitory effect was related to the free membrane-permeable hydrogen sulfide concentration. This means that the extent of its inhibition depends additionally on the pH-value. Even very low hydrogen sulfide concentrations lead to a strong inhibition of nitrous oxide reduction and therefore to a high release of nitrous oxide from wastewater treatment plants.

scholarly journals Beyond denitrification: the role of microbial diversity in controlling nitrous oxide reduction and soil nitrous oxide emissions

2021 ◽  
Author(s):  
Jun Shan ◽  
Robert A. Sanford ◽  
Joanne Chee‐Sanford ◽  
Sean Khan Ooi ◽  
Frank E. Löffler ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Microbial Diversity ◽  
Nitrous Oxide Emissions ◽  
Oxide Reduction ◽  
Nitrous Oxide Reduction

Carbon monoxide oxidation and nitrous oxide reduction on Rh/Pt(1 1 1) electrodes

2004 ◽  
Vol 49 (8) ◽  
pp. 1195-1208 ◽  
Author(s):  
Roberto Gómez ◽  
F. Javier Gutiérrez de Dios ◽  
Juan M. Feliu
Keyword(s):  
Carbon Monoxide ◽  
Nitrous Oxide ◽  
Carbon Monoxide Oxidation ◽  
Oxide Reduction ◽  
Nitrous Oxide Reduction
Sign in / Sign up

Export Citation Format

Share Document