可同時硝化及脫硝之自營性薄膜生物反應槽之研發及其菌群結構分析(1/2)
Date Issued
2003-07-31
Date
2003-07-31
Author(s)
曾四恭
DOI
912211E002032
Abstract
A PVA-immobilized biofilm, attached
to the surface of a silicone tube, was
used as the basis of a bioreactor for
simultaneous nitrification and
denitrification of water. The
bioreactor was aerated with air to
supply oxygen for nitrification and
pure hydrogen was supplied to the
silicone tube and diffused through
the membrane wall to feed the biofilm
for autotrophic denitrification. The
bioreactor was effective for the
simultaneous nitrification and
denitrification of water after a
short period of acclimation, while
the biofilm exhibited good resistance
to the inhibition of denitrification
by dissolved oxygen; the
denitrification rate decreased by
only 8 % as the dissolved oxygen
increased from 2 mg/l to saturation.
By using PVA crosslinked with sodium
nitrate to entrap nitrifying and
denitrifying sludge on the surface of
a silicone tube, a novel bioreactor
for simultaneous nitrification and
denitrification was developed. In
addition to performing as an
immobilizing agent to strengthen the
biofilm, PVA protected the
denitrifying microorganisms to
reduce the inhibition by dissolved
oxygen under aerobic condition.
Therefore, nitrification and
denitrification occurred
simultaneously within the biofilm.
Furthermore, the immobilization
technique shortened the acclimation
period of the bioreactor. The
described space saving and simple to
operate bioreactor for nitrogen
removal performed autotrophic
denitrification to solve the problem
of residual carbon in heterothiphic
denitrification, and thus is suitable
for removing nitrogen from drinking
water.
Subjects
Simultaneous nitrification and
denitrification
denitrification
biofilm
PVA
silicone membrane
Publisher
臺北市：國立臺灣大學環境工程學研究所
Type
report
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