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A generalized model for settling velocity of aerobic granular sludge

A generalized model for settling velocity of aerobic granular sludge
A generalized model for settling velocity of aerobic granular sludge
Aerobic granulation is a novel biotechnology recently receiving intensive research attention. Aerobic granules developed in SBR can be as big as several millimeters, thus the traditional models describing the settling velocity of activated sludge are no long valid in aerobic granules culture. In this study, a new type of model was developed for the settling velocity of aerobic granules. This model shows that the settling velocity of aerobic granules is the function of SVI, mean size of granules and biomass concentration of granules. When the size of bioparticle is small enough, the proposed model reduces to the well-known Vesilind equation. Results indicated that the proposed model could satisfactorily fit experimental results obtained in the course of aerobic granulation under different conditions, while the Vesilind equation failed to or very poorly fit the experimental data. In addition, the proposed model can also be extended to anaerobic granules. The settling velocity is one of the most important parameters in both aerobic and anaerobic granulation, and successful biogranulation is highly related to the manipulation of settling velocity. It was demonstrated that the proposed model can sever as a useful tool for design and operation engineers to properly select the settling velocity for enhanced aerobic and anaerobic granulation.
621-626
Liu, Yu
7aa0a5b8-dca4-4f81-b6c9-7332b1beb25c
Wang, Zhi-Wu
5ed72239-d001-4d61-a846-a99444e44825
Liu, Yong-Qiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Qin, Lei
e3f2ae03-749c-4870-928f-4e2e7d7613d6
Tay, Joo-Hwa
1bd3ce87-355e-460f-835b-56cb81f3a1b0
Liu, Yu
7aa0a5b8-dca4-4f81-b6c9-7332b1beb25c
Wang, Zhi-Wu
5ed72239-d001-4d61-a846-a99444e44825
Liu, Yong-Qiang
75adc6f8-aa83-484e-9e87-6c8442e344fa
Qin, Lei
e3f2ae03-749c-4870-928f-4e2e7d7613d6
Tay, Joo-Hwa
1bd3ce87-355e-460f-835b-56cb81f3a1b0

Liu, Yu, Wang, Zhi-Wu, Liu, Yong-Qiang, Qin, Lei and Tay, Joo-Hwa (2005) A generalized model for settling velocity of aerobic granular sludge. Biotechnology Progress, 21 (2), 621-626. (doi:10.1021/bp049674u).

Record type: Article

Abstract

Aerobic granulation is a novel biotechnology recently receiving intensive research attention. Aerobic granules developed in SBR can be as big as several millimeters, thus the traditional models describing the settling velocity of activated sludge are no long valid in aerobic granules culture. In this study, a new type of model was developed for the settling velocity of aerobic granules. This model shows that the settling velocity of aerobic granules is the function of SVI, mean size of granules and biomass concentration of granules. When the size of bioparticle is small enough, the proposed model reduces to the well-known Vesilind equation. Results indicated that the proposed model could satisfactorily fit experimental results obtained in the course of aerobic granulation under different conditions, while the Vesilind equation failed to or very poorly fit the experimental data. In addition, the proposed model can also be extended to anaerobic granules. The settling velocity is one of the most important parameters in both aerobic and anaerobic granulation, and successful biogranulation is highly related to the manipulation of settling velocity. It was demonstrated that the proposed model can sever as a useful tool for design and operation engineers to properly select the settling velocity for enhanced aerobic and anaerobic granulation.

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More information

Published date: 2005
Organisations: Water & Environmental Engineering Group

Identifiers

Local EPrints ID: 352837
URI: http://eprints.soton.ac.uk/id/eprint/352837
PURE UUID: dc06b61b-8535-417a-9992-3e40843112f1
ORCID for Yong-Qiang Liu: ORCID iD orcid.org/0000-0001-9688-1786

Catalogue record

Date deposited: 21 May 2013 14:25
Last modified: 15 Mar 2024 03:47

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Contributors

Author: Yu Liu
Author: Zhi-Wu Wang
Author: Yong-Qiang Liu ORCID iD
Author: Lei Qin
Author: Joo-Hwa Tay

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