Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015

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Comparative Study on the Migration of Heavy Metals in the Sewage Sludge Treated by Supercritical/Subcritical Water Oxidation Process

Authors
Rui Ma, Yang Zhou, Lin Fang
Corresponding Author
Rui Ma
Available Online July 2015.
DOI
10.2991/icaees-15.2015.25How to use a DOI?
Keywords
supercritical water oxidation, subcritical water oxidation, secondary sludge, migration law of heavy metals.
Abstract

Super/sub-critical water oxidation technology has been utilized to treat sewage sludge in the study. Heavy metal content and characteristics of leaching toxicity in the reaction effluent have been investigated in detail, and then the relationship between the microstructure of sludge residue and immobilization of heavy metals is analyzed systematically. The obtained results show that the enrichment ratios of heavy metals in the sludge residue are above 68%, except As; Super/sub-critical water oxidation process has good immobilization effects on the heavy metals in sewage sludge residue, except Cd and Cu; Compared with subcritical state, supercritical water oxidation process has more obvious immobilization effects on the heavy metals in sewage sludge residue. The heavy metals in sewage sludge residue exist in the form of complex compounds, presenting obviou s crystalline state, with part of crystal structures being similar. The formation of crystal microstructures contribute to the enrichment and immobilization of heavy metals in sewage sludge.

Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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Volume Title
Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
Series
Advances in Engineering Research
Publication Date
July 2015
ISBN
978-94-6252-130-8
ISSN
2352-5401
DOI
10.2991/icaees-15.2015.25How to use a DOI?
Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

risenwbib
TY  - CONF
AU  - Rui Ma
AU  - Yang Zhou
AU  - Lin Fang
PY  - 2015/07
DA  - 2015/07
TI  - Comparative Study on the Migration of Heavy Metals in the Sewage Sludge Treated by Supercritical/Subcritical Water Oxidation Process
BT  - Proceedings of the 3rd International Conference on Advances in Energy and Environmental Science 2015
PB  - Atlantis Press
SP  - 139
EP  - 145
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaees-15.2015.25
DO  - 10.2991/icaees-15.2015.25
ID  - Ma2015/07
ER  -