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Diffusivity of Oxygen in Aerobic Granules by Z.C. Chiu; M.Y. Chen; D.J. Lee; S.T.-L. Tay; J.H. Tay; K.Y. Show is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Diffusivity of Oxygen in Aerobic Granules about?

## Abstract This work for the first time estimated apparent oxygen diffusivity (__D__~app~) of two types of aerobic granules, acetate‐fed and phenol‐fed, by probing the dissolved oxygen (DO) level at the granule center with a sudden change in the DO of the bulk liquid. With a high enough flow velocity across the granule to minimize the effects of external mass transfer resistance, the diffusivity coefficients of the two types of granules were estimated with reference to a one‐dimensional diffusion model. The carbon source has a considerable effect on the granule diameter (__d__) and the oxygen diffusivity. The diffusivity coefficients were noted 1.24–2.28 × 10^−9^ m^2^/s of 1.28–2.50 mm acetate‐fed granules, and 2.50–7.65 × 10^−10^ m^2^/s of 0.42–0.78 mm phenol‐fed granules. Oxygen diffusivity declined with decreasing granule diameter, in particular, the diffusivity of acetate‐fed granules is proportional to the size, whereas the diffusivity of phenol‐fed granules is proportional to the square of granule diameter. The existence of large pores in granule, evidenced by FISH‐CLSM imaging, was proposed to correspond to the noted size‐dependent oxygen diffusivity. The phenol‐fed granule

Who reads Diffusivity of Oxygen in Aerobic Granules?

Author

Z.C. Chiu; M.Y. Chen; D.J. Lee; S.T.-L. Tay; J.H. Tay; K.Y. Show

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0006-3592)

Published

2006

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)