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Source Journal of Chinese Scientific and Technical Papers
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Huo Pan, Cao Liwen, Tian Yanfeng. APPLICATION AND COMPARISON OF AHP AND FUZZYEVALUATION METHOD IN LANDFILL SITING[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(3): 131-135. doi: 10.13205/j.hjgc.201503026
Citation: 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

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
  • 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.
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