A review of wet air oxidation and thermal hydrolysistechnologies in sludge treatment

Hii, K, Baroutian, S, Parthasarathy, R, Gapes, D and Eshtiaghi, N 2014, 'A review of wet air oxidation and thermal hydrolysistechnologies in sludge treatment', Bioresource Technology, vol. 155, pp. 289-299.

Document type: Journal Article
Collection: Journal Articles

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Title A review of wet air oxidation and thermal hydrolysistechnologies in sludge treatment
Author(s) Hii, K
Baroutian, S
Parthasarathy, R
Gapes, D
Eshtiaghi, N
Year 2014
Journal name Bioresource Technology
Volume number 155
Start page 289
End page 299
Total pages 11
Publisher Elsevier BV
Abstract With rapid world population growth and strict environmental regulations, increasingly large volumes of sludge are being produced in today's wastewater treatment plants (WWTP) with limited disposal routes. Sludge treatment has become an essential process in WWTP, representing 50% of operational costs. Sludge destruction and resource recovery technologies are therefore of great ongoing interest. Hydrothermal processing uses unique characteristics of water at elevated temperatures and pressures to deconstruct organic and inorganic components of sludge. It can be broadly categorized into wet oxidation (oxidative) and thermal hydrolysis (non-oxidative). While wet air oxidation (WAO) can be used for the final sludge destruction and also potentially producing industrially useful by-products such as acetic acid, thermal hydrolysis (TH) is mainly used as a pre-treatment method to improve the efficiency of anaerobic digestion. This paper reviews current hydrothermal technologies, roles of wet air oxidation and thermal hydrolysis in sludge treatment, and challenges faced by these technologies.
Subject Wastewater Treatment Processes
Keyword(s) Thermal hydrolysis
wet air oxidation
wastewater sludge
hydrothermal processing
sludge treatment
DOI - identifier 10.1016/j.biortech.2013.12.066
Copyright notice © 2013 Elsevier Ltd
ISSN 0960-8524
Additional Notes Creative Commons Licence
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Australia License.
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