title: Efficiency of biological activator formulated material (BAFM) for volatile organic compounds removal--preliminary batch culture tests with activated sludge.
abstract: During biological degradation, such as biofiltration of air loaded with volatile organic compounds, the pollutant is passed through a bed packed with a solid medium acting as a biofilm support. To improve microorganism nutritional equilibrium and hence to enhance the purification capacities, a Biological Activator Formulated Material (BAFM) was developed, which is a mixture of solid nutrients dissolving slowly in a liquid phase. This solid was previously validated on mineral pollutants: ammonia and hydrogen sulphide. To evaluate the efficiency of such a material for biodegradation of some organic compounds, a simple experiment using an activated sludge batch reactor was carried out. The pollutants (sodium benzoate, phenol, p-nitrophenol and 2-4-dichlorophenol) were in the concentration range 100 to 1200 mg L(-1). The positive impact of the formulated material was shown. The improvement of the degradation rates was in the range 10-30%. This was the consequence of the low dissolution of the nutrients incorporated during material formulation, followed by their consumption by the biomass, as shown for urea used as a nitrogen source. Owing to its twofold interest (mechanical resistance and nutritional supplementation), the Biological Activator Formulated Material seems to be a promising material. Its addition to organic or inorganic supports should be investigated to confirm its relevance for implementation in biofilters.
authors.affiliation: Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, Avenue du Général Leclerc, CS 50837, 35708 Rennes Cedex 7, France.
authors.forename: Charline
authors.initials: C
authors.lastname: Corre
authors.forename: Catherine
authors.initials: C
authors.lastname: Couriol
authors.forename: Abdeltif
authors.initials: A
authors.lastname: Amrane
authors.forename: Eric
authors.initials: E
authors.lastname: Dumont
authors.forename: Yves
authors.initials: Y
authors.lastname: Andrès
authors.forename: Pierre
authors.initials: P
authors.lastname: Le Cloirec
mesh_terms: D000393:Air Pollutants / Q000378:metabolism*; D061249:Batch Cell Culture Techniques; D057919:Biological Oxygen Demand Analysis; D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods*; D002733:Chlorophenols / Q000378:metabolism; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D009596:Nitrophenols / Q000378:metabolism; D009930:Organic Chemicals / Q000378:metabolism; D019800:Phenol / Q000378:metabolism; D012722:Sewage; D020160:Sodium Benzoate / Q000378:metabolism; D055549:Volatile Organic Compounds / Q000378:metabolism*
chemical_list: D000393:Air Pollutants; D002733:Chlorophenols; D009596:Nitrophenols; D009930:Organic Chemicals; D012722:Sewage; D055549:Volatile Organic Compounds; D019800:Phenol; D020160:Sodium Benzoate; C004762:2,4-dichlorophenol; C024836:4-nitrophenol