Biological floc size measurement for shear stress evaluation in full-scale aeration tanks

International audienc

Mitigation of N2O production in denitrifying BAFs

International audienc

Mitigation of N2O production in denitrifying BAFs

International audienc

N2O emission assessment and mitigation in full-scale biofilm reactors

International audienc

N2O emission assessment and mitigation in full-scale biofilm reactors

International audienc

Gas-liquid oxygen transfer in aerated and agitated slurry systems with high solid volume fractions

Oxygen transfer can be a limiting step in aerobic biodegradation processes. Therefore, this process has been widely investigated for wastewater treatment, but only few research works have been done on soil slurry systems. This study focuses on the gas-liquid oxygen mass transfer in clay slurry conditions in an aerated and agitated reactor using a marine propeller. Conversely to most studies on oxygen transfer, pneumatic power input is not negligible compared to mechanical power input. Clay presence has a negative impact on the oxygen transfer. However, the effect of agitation and aeration on this process remains unaffected at the clay concentrations tested. Three different phases explaining the depletion in the oxygen transfer rate are hypothesized. A model to predict the oxygen transfer coefficient in slurry reactors, including the three operational parameters tested within their respective ranges, is proposed

Remediation of PAH-Contaminated Soils: Experimental Analysis and Modeling of Hydrodynamics and Mass Transfer in a Soil-Slurry Bioreactor.

International audienc