The Study of Treatment of Exhaust Gas Containing NOx by Biofiltration Method
Date Issued
1998-07-31
Date
1998-07-31
Author(s)
楊萬發
DOI
872218E002009
Abstract
A biofilter combined with an autocontinuousmonitoring system was used to
simulate treating waste gases containing nitric
oxide (NO) in this study. The filter medium
was composed of composts and wood
chips, and the wastewater containing denitrifying
bacteria was blended into it. So the
microorganisms can grow on the surface of
filter medium to reduce NO by microbial
denitrification. The gas inlet concentration
of NO, oxygen level, additional carbon
source, and phosphates that would influence
the NO elimination rate of the biofilter were
discussed in this study.
The results indicate that raising the
inlet concentration of NO and the oxygen
level decrease the NO removal. However,
adding glucose and phosphates increase it.
In anaerobic condition, the gas flow rate was
maintained at 500 ml/min and the NO inlet
concentration was 500 ppm, the NO elimination
rate was up to a highest value about 99%
when adding glucose 1 g/day and phosphates
at the same time. The oxygen level larger
than 2% will inhibit the microbial denitrification
and the NO elimination rate decreased
into 60%. After adding the glucose 1 g/day,
the filter effect increased from 21% into 99%,
and it also changed from 54% into 72% by
adding the phosphates.
Moreover, the anaerobic experiment
was simulated using reaction limitation
model. Under the condition of a fixed flow
rate, the NO elimination rate decreased when
NO inlet concentration increased in the zero
order reaction limitation model, but it was a
constant in the first order reaction limitation
model. The trend of anaerobic experiment
can be well simulated using this model.
Subjects
biofilter
auto-continuous monitoring
nitric oxide
reaction limitation
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
872218E002009.pdf
Size
325.73 KB
Format
Adobe PDF
Checksum
(MD5):5394651822c6438bfc4b67bde8d4dac9