Bioprocesses for the treatment and valorisation of gas emissions, odours, volatile compounds and greenhouse gases

Different bioprocesses for the treatment as well as the valorisation of waste gases and greenhouse gases are briefly reviewed. Biotreatment technologies are based on the use of bioreactors for waste gas treatment, e.g., biofilter, biotrickling filter, bioscrubber, suspended growth bioreactor with gas diffusion. Aspects related to waste gas (bio)valorisation address the potential of aerobic knallgas bacteria (e.g., C. necator ), microalgae, as well as anaerobic acetogenic bacteria aiming at obtaining a range of biofuels and bioproducts mainly through bioconversion of one carbon gases (e.g., CO 2 , CO). Valorisation of waste gases appears to be a promising innovative, cost-effective, sustainable alternative to conventional treatment technologies.