Study on Biotoxicity of Sludge Stabilized by Sludge Drying Reed Bed

DOI

10.2991/iceep-18.2018.81How to use a DOI?

Keywords

Sludge drying reed bed; Excess sludge; Luminescent bacteria; Biological toxicity

Abstract

The sources of urban sewage are complex that lead to harmful substances such as heavy metals et al existing in the excess sludge. If the sludge is directly discharged into the environment without treatment, it will cause secondary pollution to the environment. The paper used the photogenic bacteria to test the changes of the biotoxicity of the sludge stabilized by sludge drying reed bed at different times under different drying conditions, investigated the efficacy of the toxic substances degradation and transformation in the process of sludge stabilization by reed bed comparing with the conventional drying bed. The results show that the biotoxicity of stabilized sludge in the reed bed under the condition of ventilation reduced more comparing to the other conditions; meanwhile, the biological toxicity of the sludge in the bottom layer changed from high toxicity to low toxicity. As a result, the sludge stabilized by reed bed can significantly reduce its ecological risk and improve its agricultural safety.

Copyright

© 2018, 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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TY  - CONF
AU  - Yao-bo Liu
AU  - Yu-bo Cui
AU  - Zhuma Luosang
AU  - Xin Li
AU  - Wen-ju Yang
AU  - Jun-yu Liang
PY  - 2018/09
DA  - 2018/09
TI  - Study on Biotoxicity of Sludge Stabilized by Sludge Drying Reed Bed
BT  - Proceedings of the 2018 7th International Conference on Energy and Environmental Protection (ICEEP 2018)
PB  - Atlantis Press
SP  - 473
EP  - 477
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceep-18.2018.81
DO  - 10.2991/iceep-18.2018.81
ID  - Liu2018/09
ER  -