Management of Microbial Communities through Transient Disturbances Enhances the Functional Resilience of Nitrifying Gas-Biofilters to Future Disturbances

• DOI: 10.1021/acs.est.5b02740
• Publication Date: 2015-12-09T14:11:57Z
• Authors: Léa Cabrol; Franck Poly; Luc Malhautier; Thomas Pommier; Catherine Lerondelle; Willy Verstraete; Anne-Sophie Lepeuple; Jean-Louis Fanlo; Xavier Le Roux
• Keywords: Nitrobacter; Biofilter; Bioaugmentation; Nitrifying Bacteria; Nitrosomonas europaea; Ammonia monooxygenase

Microbial communities have a key role for the performance of engineered ecosystems such as waste gas biofilters. Maintaining constant despite fluctuating environmental conditions is prime interest, but it highly challenging because mechanisms that drive response microbial to disturbances still be disentangled. Here we demonstrate bioprocess and stability can improved reinforced in face disturbances, through rationally predefined strategy resource management (MRM). This was experimentally validated replicated pilot-scale nitrifying gas-biofilters, two steps nitrification. The associated biological were unraveled analysis functions, abundances community compositions major actors nitrification these biofilters, is, ammonia-oxidizing bacteria (AOB) Nitrobacter-like nitrite-oxidizers (NOB). Our MRM strategy, based on application successive, transient perturbations increasing intensity, enabled steer nitrifier favorable way selection more resistant AOB NOB sharing functional gene sequences close those of, respectively, Nitrosomonas eutropha Nitrobacter hamburgensis are well adapted high N load. induced shifts resulted significant enhancement resilience capacity following intense perturbation.