Treatment of a gaseous mixture by biofilters filled with an inorganic packing material: performance and influence of inoculation on removal efficiency levels

Abstract

BACKGROUND: The impact of inoculation on performance and subsequent community structure is a critical question in gas biofiltration processes. Thus, the aim of this study is to evaluate the impact of inoculation on biofilters packed with an inorganic medium and fed with a gaseous mixture (oxygenated and sulphur compounds).

Spatial heterogeneity in degradation characteristics and microbial community composition of pesticide biopurification systems

“…() and Gadal‐Mawart et al . () did investigate biodegradation efficiencies in biofilters. Due to the environmental conditions in the top layer of these biofilter columns (low humidity and high toxic pollutant concentrations), most compounds were eliminated in the middle and lower parts.…”

“…; Gadal‐Mawart et al . ). A number of abiotic factors could be important for determining differences in pesticide degradation rate throughout the BPS matrix.…”

“…Although some work has been done investigating the microbial community and activity contributing to the degradation of pesticides inside a BPS (Coppola et al 2011;Tortella et al 2013a,b,c), information about these phenomena throughout the entire BPS remain to date illusive. However, some work has been done investigating the spatial structure of microbial communities and degradation of volatile organic compounds in biofilters (Tresse et al 2002;Khammar et al 2005;Cabrol et al 2012;Gadal-Mawart et al 2012). A number of abiotic factors could be important for determining differences in pesticide degradation rate throughout the BPS matrix.…”

Influence of key physicochemical and hydrodynamic specifications of three packing materials on both performance and bacterial community structure of gas‐biofilters

“…This result can be explained by low selective pressure (concentration of contaminants) and high resource availability (biodegradable compounds, nutrients) in BF1 and BF2, which influence the community composition. This may be an indication of functional redundancy, which is ensured by the presence of a reservoir of species able to perform the same ecological function . Then, targeting the total bacterial community, with current 16S rDNA‐based methods, may not be discriminant enough to reveal the potential link between a characteristic of the packing material, the removal performances and the local development of adapted populations.…”

Comparative Evaluation of Conventional and Innovative Biotechnologies for Odour Abatement in Wastewater Treatment Plants

“…Recent studies have demonstrated that it is possible to find radial gradients in the microbial population due to heterogeneities in the packing material, that may result from the occurrence of preferential pathways, different pollutants and nutrients concentration, etc. (Gadal-Mawart et al, 2011).…”