Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain)

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Document typeArticle
Defense date2016-06-13
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Abstract
Emission factors of formaldehyde and VOCs were determined for two waste treatment plants (WTP) located in
the metropolitan area of Barcelona city. Formaldehyde emission factors were determined from the biogas engines
exhausts and the process chimneys (after the biofilter process), and VOC emission factors were determined
in the process chimneys. Formaldehyde and VOC were dynamically sampled usingDNPH-coated adsorbent tubes
with ozone scrubber and multi-sorbent bed tubes (Carbotrap, Carbopack X and Carboxen 569), respectively,
using portable pump equipment. Formaldehyde emission factors from biogas engines were found between
0.001–0.04 g s-1. Additionally, formaldehyde and VOC emission factors from process chimneys were found to
be between 0.0002–0.003 g s-1 and 0.9 ± 0.3 g s-1, respectively. Employing real emission factors, the expected
concentrations derived from the WTPs in their nearby urban areaswere calculated using The Atmospheric Pollution
Model (TAPM, CSIRO), and impact maps were generated. On the other hand, ambient air formaldehyde and VOC
concentrations were determined in selected locations close to the evaluated waste treatment facilities using both
active and passive samplers, and were between 2.5±0.4–5.9±1.0 µgm-3and91±48–242±121 µgm-3, respectively.
The concentrations of formaldehyde and VOC derived exclusively from the waste treatment plants were
around 2% and 0.3 ± 0.9% of the total formaldehyde and VOC concentrations found in ambient air, respectively.
CitationGallego, E., Roca, F., Perales, J., Guardino, X., Gadea, E. Impact of formaldehyde and VOCs from waste treatment plants upon the ambient air nearby an urban area (Spain). "Science of the total environment", 13 Juny 2016, vol. 568, p. 369-380.
ISSN0048-9697
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S0048969716311809
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