利用氫氣自營性薄膜生物脫硝反應槽去除水源中硝酸鹽之研究
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
曾四恭
DOI
902211E002040
Abstract
Biological denitrification of
wastewater with heterotrophic
microorganisms has been a widely
applied treatment because of its high
efficiency and low cost. However,
residual carbon from this process causes
many problems in drinking-water
treatment. These problems make
autotrophic denitrification by hydrogen
oxidizing bacteria a good alternative. In
addition to using hydrogen gas, which is
harmless to humans and clean as an
energy source, the bacteria also draw on
inorganic carbon, which removes any
problems residual organic carbon may
cause. A laboratory-scale autotrophic
membrane-attached biofilm reactor was
developed to remove nitrate from
drinking water. Hydrogen and carbon
dioxide flowed together into the lumem
side of a gas-permeable silicone tube. The
gases diffused through the membrane wall
to feed the denitrifying bacteria that
formed a biofilm on the surface of the
silicone tube for autotrophic
denitrification. Hydrogen provided the
energy source, and carbon dioxide,
besides serving as the carbon source, was
employed to neutralize the alkalinity from
denitrification. The experimental results
indicated that there was no significant
difference between using pure culture
（ Alcaligenes eutrophus）or sludge to
start the bioreactor. Supplying a suitable
amount of carbon dioxide together with
hydrogen into the silicone tube solved the
problem that alkalinity formation caused
during denitrification, and then the
nitrogen removal rate was increased. In
addition, nitrate removal efficiency had a
positive relationship to the length of the
silicone tube, made the bioreactor more
flexible for actual application.
Subjects
Autotrophy
denitr ification
membrane bioreactor
nitrate
SDGs
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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