Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)

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Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization

Authors
Yanfei Tang, Xiaowei Li, Bin Dong, Lingling Dai, Junjie Huang, Yanhong Wei, Xiaohu Dai
Corresponding Author
Yanfei Tang
Available Online July 2016.
DOI
10.2991/aeece-16.2016.27How to use a DOI?
Keywords
Sludge Phytotoxicity; Stabilization treatment; Humification; Land application.
Abstract

Seed germination and germinated seedlings growth in sewage sludge were analyzed using acute and subchronic phytotoxicity assays, in order to explore the changes in sludge phytotoxicity during the combination of high-rate anaerobic digestion and aerobic composting. Results showed that compared with the raw sludge (RS), the seed germination index (GI) and shoot length of germinated seedlings of anaerobic digested sludge (ADS) reduced after anaerobic digestion. It implied the high-rate anaerobic digestion (AD) caused an increase of the sludge phytotoxicity. After 14-day Sequential aerobic composting, shoot length, fresh and dry shoot biomass of the seedlings in the aerobic compost sludge (ACS) significantly enhanced, compared with that of the ADS. As the composting lasted from 14 d to 60 d, there was not an evident increasing trend in seed germination and germinated seedlings growth of the sludge. Additionally, humification indexes significantly correlated with GI, and the negative slope at ACS 60d was in accordance with the decreasing trend of plant growth. The findings indicate the 14-day sequential aerobic composting was necessary and feasible for the complement of high-rate anaerobic digestion of sewage sludge in consideration of the phytotoxicity reduction.

Copyright
© 2016, 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 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)
Series
Advances in Engineering Research
Publication Date
July 2016
ISBN
978-94-6252-231-2
ISSN
2352-5401
DOI
10.2991/aeece-16.2016.27How to use a DOI?
Copyright
© 2016, 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  - Yanfei Tang
AU  - Xiaowei Li
AU  - Bin Dong
AU  - Lingling Dai
AU  - Junjie Huang
AU  - Yanhong Wei
AU  - Xiaohu Dai
PY  - 2016/07
DA  - 2016/07
TI  - Changes in Phytotoxicity during High-rate Anaerobic Digestion and Sequential Aerobic Composting for Sewage Sludge Stabilization
BT  - Proceedings of the 2016 2nd International Conference on Advances in Energy, Environment and Chemical Engineering (AEECE 2016)
PB  - Atlantis Press
SP  - 121
EP  - 126
SN  - 2352-5401
UR  - https://doi.org/10.2991/aeece-16.2016.27
DO  - 10.2991/aeece-16.2016.27
ID  - Tang2016/07
ER  -