Document Detail

The biofiltration of indoor air: implications for air quality.
MedLine Citation:
PMID:  10842459     Owner:  NLM     Status:  MEDLINE    
An alternative method of maintaining indoor air quality may be through the biofiltration of air recirculating within the structure rather than the traditional approach of ventilation. This approach is currently being investigated. Prior to its acceptance for dealing with volatile organic compounds (VOCs) and CO2, efforts were made to determine whether the incorporation of this amount of biomass into the indoor space can have an (negative) impact on indoor air quality. A relatively large ecologically complex biofilter composed of a ca. 10 m2 bioscrubber, 30 m2 of plantings and a 3,500 litre aquarium were established in a 160 m2 'airtight' room in a recently constructed office building in downtown Toronto. This space maintained ca. 0.2 air changes per hour (ACH) compared to the 15 to 20 ACH (with a 30% refresh rate) of other spaces in the same building. Air quality parameters of concern were total VOCs (TVOCs), formaldehyde and aerial spore counts. TVOC and formaldehyde levels in the biofilter room were the same or significantly less than other spaces in the building despite a much slower refresh rate. Aerial spore levels were slightly higher than other indoor spaces but were well within reported values for 'healthy' indoor spaces. Levels appeared to be dependent on horticultural management practices within the space. Most genera of fungal spores present were common indoors and the other genera were associated with living or dead plant material or soil. From these results, the incorporation of a large amount of biomass associated with indoor biofilters does not in itself lower indoor air quality.
A Darlington; M Chan; D Malloch; C Pilger; M A Dixon
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Indoor air     Volume:  10     ISSN:  0905-6947     ISO Abbreviation:  Indoor Air     Publication Date:  2000 Mar 
Date Detail:
Created Date:  2000-07-11     Completed Date:  2000-07-11     Revised Date:  2009-09-29    
Medline Journal Info:
Nlm Unique ID:  9423515     Medline TA:  Indoor Air     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  39-46     Citation Subset:  IM    
Department of Plant Agriculture, University of Guelph, Ontario, Canada.
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MeSH Terms
Air Pollution, Indoor / prevention & control*
Bacteria / metabolism*
Disinfectants / analysis
Filtration / methods
Formaldehyde / analysis
Quality Control
Reg. No./Substance:
0/Disinfectants; 50-00-0/Formaldehyde

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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