The anammox process, as an alternative to conventional nitrogen removal technologies,
has abstracted much attention in recent years. In this study, two column-type reactors
using different support materials—net type acrylic fiber (Biofix) and polyester
nonwoven—were used for anammox treatment. The nonwoven reactor was operated at
35℃ and the Biofix reactor at 25℃ (peak summer temperature, 31.5℃). Over 330 days of
operation, the nitrogen loading rates of the Biofix and nonwoven reactors were increased
to 3.6 kg-N/㎥/d and 4.0 kg-N/㎥d and T-N removal efficiencies reached to 81.3% and
86.3%, respectively. A protein substance was shown to be the most abundant extracellular
polymeric substances (EPS) in the anammox sludge with almost three times more in the
granular sludge of the Biofix reactor than in the granular sludge of the nonwoven reactor.
Considering the EPS levels and observation by scanning electron microscopy, the anammox
granules in the Biofix reactor were denser than that in the nonwoven reactor. Results of
DNA analyses indicated that the KSU-1 strain might prefer relatively low nutrient levels,
while the KU2 strain might be better suited for the high media concentration. Other kinds
of bacteria were also identified with the potentials for consuming the dissolved oxygen in
the influent and facilitating anammox bacteria surviving under aerobic conditions.
雑誌名
日本水処理生物学会誌
巻
45
号
1
ページ
1 - 11
発行年
2009-03-15
書誌レコードID
AN00351126
DOI
https://doi.org/10.2521/jswtb.45.1
権利
Copyright (c) 2009 by Japanese Society of Water Treatment Biologyer Treatment Biology
Comparison of Anammox Treatment Performances Using Different Kinds of Biomass Carriers
JSWTB_45_1_2009_001-011.pdf
(1.95MB)
