Indoor Air Purification by Compost Packed Biofilter

摘要: Abstract The interest in Indoor Air Quality (IAQ) has increased this past decade dueto better knowledge of kind pollution. Recent studies have pointed out theIndoor Pollution (IAP) impact on health and associated costs. IAQ improve-ment can be achieved by removal pollutant with adapted process. Numerousprocesses, as sorption or UV photocatalysis, been studied for IAP treatment.However, specificities, including high number compounds differentphysico-chemical properties at low concentrations, still limit process efficiencies.Competition between pollutants selectivity are also common limita-tions. Biofiltration is commonly used to treat effluents containing numerous com-pounds concentration composting units wastewater treatment plants.Moreover, since it uses waste a filtration medium avoids the addition ofchemical products, biofiltration sustainable technology. In study, biofilterperformances evaluated. biofilter packed com-post, natural which large range microorganisms, good phys-ical (water retention, pH) contains nutrients. model effluentcontains 8 (aldehyde, aromatic, chlorinated, inorganic...), con-centration (sub-ppmv), chosen their ubiquity indoor air, heterogeneousphysical chemical (solubility, vapor pressure, biodegradability) andtheir potential risk due chronic exposures. Biofilter performances wereevaluated during 75 days steady state. Three compounds, undecane, limoneneand butyl acetate, could not quantified efficiencies areclose 100 %. Butanol, formaldehyde toluene were removed efficien-cies close % first 40 days. After time, efficiency variationswere observed decreased 55.5, 77.8 13.9 forbutanol, toluene, respectively. decrease bed moisturecontent seems main explanation these phenomena. Removal 86.3 – 99.6 nitrogen dioxide. Only trichloroethylene,