Biogas is a very interesting source of renewable energy. However, its desulfurization is necessary, and sometimes an adjustment of the methane (CH₄) concentration (upgrading), by reducing the carbon dioxide (CO₂) concentration. The removal or capture of CO₂ can be carried out by biological methods, with microalgae being the most used microorganisms, given their high CO₂ assimilation capacity.

   However, high CO₂ concentrations inhibit the microalgae growth, which makes it difficult to apply. In the present study, a microalgae consortium of leachate from landfills has been isolated to study the effect of CO₂ concentration on its growth. Two bubble column photobioreactors were built with an inner diameter of 100 mm and a working volume of 8 L.

Saldarriaga, L. F^1,2, Ramírez, M.¹, Almenglo, F., Gómez J.M, Cantero, D¹

1 Departamento de Ingeniería Química y Tecnología de Alimento. Facultad de Ciencias. Universidad de Cádiz. Instituto Universitario de Investigación Vitivinícola y Agroalimentario (IVAGRO). Av. República Saharaui S/N. 11510 Puerto Real, Cádiz, Spain
2 Departamento de Química. Universidad del Atlántico. Km 8. Vía Puerto Colombia, Colombia.
* martin.ramirez@uca.es

   Nowadays, we recognise the link between the growing frequency of illnesses such as asthma, allergies and cancers, and the effects of exposure to chemical pollutants in the air that we breathe indoors. Considering these negative effects, indoor air quality (IAQ) is a public health issue that also determines, to a large extent, occupant health, comfort and productivity and, therefore requires special attention.

   Currently, technologies used to treat this kind of pollution have been judged and are not considered fully satisfactory for achieving cleaner indoor air. Accordingly, the main objective of the present study is to treat a micro-polluted air with seven VOCs recognised as important contributors to the deterioration of Indoor Air (IA) (butanol, butyl acetate, formaldehyde, limonene, toluene, trichloroethylene (TCE) and undecane).

C; Hort^1*, V. Platel¹, A. Luengas¹, M. Ondarts², S. Sochard¹

¹ Thermal, Energy and Process Laboratory (LaTEP), Université de Pau et des Pays de l’Adour, Quartier Bastillac, 55 Avenue d'Azereix BP 1624, 65016 Tarbes, France. * cecile.hort@univ-pau.fr

2 Laboratoire Optimisation de la Conception et Ingénierie de l’Environnement (LOCIE), Université de Savoie, Polytech Annecy-Chambéry Campus scientifique Savoie Technolac, 73376 Le Bourget du Lac, France