EARLY WARNING OF ACTIVATED SLUDGE INHIBITORY ACTION BY HEAVY METALS
BASED ON OXYGEN UPTAKE RATE INDEX

Chen Yasong; Zhang Chao; Chen Zhenguo; Dong Wenjie; Xu Bingxin

doi:10.13205/j.hjgc.201502006

Volume 33 Issue 2

Mar. 2015

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2015 > 33(2): 27-31

LI Zhili, WANG Haitao, HUO Hanxin, ZHAO Jin, ZHANG Yizhong, WANG Xunliang, GUO Jian, JIANG Tianxiang, MA Yuhui. MAGNETIC BIOCHAR AEROGEL FROM WASTE CORRUGATED PAPER FOR ADSORPTION OF METHYLENE BLUE FROM WATER: PREPAREATRION AND PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 210-217. doi: 10.13205/j.hjgc.202412025

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Chen Yasong, Zhang Chao, Chen Zhenguo, Dong Wenjie, Xu Bingxin. EARLY WARNING OF ACTIVATED SLUDGE INHIBITORY ACTION BY HEAVY METALS BASED ON OXYGEN UPTAKE RATE INDEX[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(2): 27-31. doi: 10.13205/j.hjgc.201502006

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EARLY WARNING OF ACTIVATED SLUDGE INHIBITORY ACTION BY HEAVY METALS BASED ON OXYGEN UPTAKE RATE INDEX

doi: 10.13205/j.hjgc.201502006

Publish Date: 2015-02-22

Abstract

Abstract

The early warning of activated sludge inhibitory rate by Cu2 + ，Zn2 + was studied based on oxygen uptake rate ( OUR) index． When dosage of Cu2 + and Zn2 + increased from 20 mg /L to 60 mg /L， the OUR inhibitory rate increased from 33% and 38% up to 77% and 63%，respectively． With a rising of dosage of heavy metals，the activated sludge's inhibitory rate measured by OUR index was enhanced． With a certain condition and common dosage of heavy metals ( 20 mg /L) ，the OUR inhibitory rate order by four heavy metals was Cu2 + ＞ Zn2 + ＞ Cd2 + ＞ Cr3 + ． The operation parameters for early warning reactor were optimized by single factor and orthogonal test，the results indicated that the best parameters were as follows: ρ( MLSS) = 500 mg /L，HRT = 10 min． The early warning equipment was applied to simulate sewage added in Cu2 + and Zn2 + respectively，which indicated that the OUR inhibitory rate was 22. 3% and 56. 6%，with common dosage of heavy metals ( 5 mg /L) ． Thus，the early warning equipment based on oxygen uptake rate ( OUR) index can be applied to early warning of the activated sludge inhibitory action by heavy metals in wastewater treatment plant．
- oxygen uptake rate ( OUR),
- heavy metal,
- toxicity,
- inhibitory rate,
- early warning

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