Journal of Water and Environment Technology
Online ISSN : 1348-2165
ISSN-L : 1348-2165
原著論文
Formation of Nitrifying Granules Using a Continuous Stirred-Tank Reactor
Naohiro KISHIDAYutaka YAMASHITASatoshi TSUNEDA
著者情報
ジャーナル フリー

2012 年 10 巻 1 号 p. 47-55

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抄録
In this study, the formation characteristics of aerobic granular sludge (AGS) mainly composed of nitrifying bacteria (referred to as nitrifying granules) in a continuous stirred-tank reactor (CSTR) were investigated at several surface loading rates (equal to the liquid linear velocity at the sludge settling zone). The surface loading rate strongly affected the selection of larger granular sludge similarly to the sludge settling time in a sequencing batch reactor. By setting an appropriate surface loading rate (1.4 m3/m2/d), small particles were effectively washed out, and larger granular sludge selectively remained in the reactor. As a result, nitrifying granules were effectively formed even with keeping an identical flow condition from the startup. To the best of our knowledge, this is the first study that has succeeded in forming nitrifying granules with keeping an identical flow condition from the startup using a continuous-flow reactor. These findings will contribute to the dissemination of AGS technology because information on the formation of AGS in a continuous-flow reactor is limited.
著者関連情報
© 2012 Japan Society on Water Environment
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