Study on the inhibiting factors of the activated sludge activity of hexavalent chromium based on the change of dissolved oxygen

DOI

10.2991/eesed-16.2017.16How to use a DOI?

Keywords

Oxygen Uptake Rate (OUR); Hexavalent Chromium; Activated Sludge; Inhibiting Factor

Abstract

Based on the effect of variation of dissolved oxygen on the oxygen uptake rate (our), To study the effect of Cr6+ on the performance of activated sludge under different factors (concentration, MLSS, HRT, temperature, pH) by using activated sludge own activity. It has certain reference significance for the early warning and treatment of heavy metal in sewage plant. The results indicated that: (1) when the concentration of Cr6+ is less than 15mg/L, the inhibition rate increases gradually. When the concentration of Cr6+ is more than 15mg/L, the inhibition rate changes significantly. (2) Low concentration of MLSS is sensitive to heavy metal, high concentration of heavy metals can resist certain impact load. (3)The metabolism of the microbe which in the activated sludge would decrease the activity when the residence time extends. (4) The inhibitory effect of hexavalent chromium on activated sludge decreased with the increase of pH, and the tolerance ability of activated sludge to hexavalent chromium is stronger under the alkaline condition.(5) In the higher temperature, the activated sludge has strong impact tolerance to the same concentration of heavy metals.

Copyright

© 2017, 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  - Wen-Yu Zhao
AU  - Zheng Zhao
AU  - Mei-Juan Xu
AU  - Yu-Fen Chen
AU  - Chao Feng
PY  - 2016/08
DA  - 2016/08
TI  - Study on the inhibiting factors of the activated sludge activity of hexavalent chromium based on the change of dissolved oxygen
BT  - 2nd Annual International Conference on Energy, Environmental & Sustainable Ecosystem Development (EESED 2016)
PB  - Atlantis Press
SP  - 116
EP  - 123
SN  - 2352-5401
UR  - https://doi.org/10.2991/eesed-16.2017.16
DO  - 10.2991/eesed-16.2017.16
ID  - Zhao2016/08
ER  -