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Hydrothermal carbonization of primary sewage sludge and synthetic faeces: Effect of reaction temperature and time on filterability

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journal contribution
posted on 03.06.2016 by Eric Danso-Boateng, Richard Holdich, Andrew Wheatley, Simon Martin, Gilbert Shama
The effect of reaction temperature and time on the filterability of slurries of primary sewage sludge (PSS) and synthetic faeces (SF) following hydrothermal carbonisation (HTC) was investigated and optimised using response surface methodology (RSM). Filterability was shown to improve as the treatment temperature and reaction time at which the solids were carbonised was increased. The best filtration results were achieved at the highest temperature (200°C) and longest treatment time (240 min) employed here. The specific cake resistance to filtration of the carbonised solids was found to vary between 5.43 x 1012 and 2.05 x 1010 m kg–1 for cold filtration of PSS, 1.11 x 1012 and 3.49 x 1010 m kg–1 for cold filtration of SF, and 3.01 x 1012 and 3.86 x 1010 m kg–1 for hot filtration of SF, and decreased with increasing reaction temperature and time for carbonisation. There was no significant difference in the specific resistance of cold and hot filtration for SF. The RSM models employed here were found to yield predictions that were close to the experimental results obtained and should therefore prove useful in designing and optimizing HTC filtration systems for generating solids for a wide variety of end uses.

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  • Architecture, Building and Civil Engineering

Published in

ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY

Volume

34

Issue

5

Pages

1279 - 1290 (12)

Citation

DANSO-BOATENG, E. ...et al., 2015. Hydrothermal Carbonization of Primary Sewage Sludge and Synthetic Faeces: Effect of Reaction Temperature and Time on Filterability. Environmental Progress & Sustainable Energy, 34(5), pp. 1279-1290.

Publisher

© Wiley

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

This is the peer reviewed version of the following article: DANSO-BOATENG, E. ...et al., 2015. Hydrothermal Carbonization of Primary Sewage Sludge and Synthetic Faeces: Effect of Reaction Temperature and Time on Filterability. Environmental Progress & Sustainable Energy, 34(5), pp. 1279-1290., which has been published in final form at http://dx.doi.org/10.1002/ep.12114. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."

ISSN

1944-7442

Language

en

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