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
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
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.
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
Huo Pan, Cao Liwen, Tian Yanfeng. APPLICATION AND COMPARISON OF AHP AND FUZZY
EVALUATION METHOD IN LANDFILL SITING[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(3): 131-135. doi: 10.13205/j.hjgc.201503026