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Inhibition of microbial activity by ammonia-nitrogen in landfill leachate

Zhao Qingliang( School of Municipal & Environmental Engineering, Harbin University of Civil Engineering & Architecture, Harbin 150008)  
A lab-scale study has been undertaken to investigate the inhibition of microbial activity by ammonianitrogen both in synthetic wastewater and landfill leachate. Experimental results showed that dehydrogenase activity of activated sludge decreased from 11. 04 to 4.22 ug TF/mg MLSS and COD removal declined from 95. 1 % to 79. 1 % respectively, when ammonia-nitrogen concentration in synthetic wastewater increased from 50 to 800 mg/L from diluted leachate in different bioreactors in parallel, the dehydrogenase activity were 9. 29, 8. 80, 8. 71,7- 12 and 4. 93 pg TF/mg MLSS respectively. All these results showed that high strength ammonia-nitrogen present in landfill leachate had severe inhibition effect to the microbe and ammonia-nitrogen should be removed andlimited down to 5O mg/L prior to any biological treatment.
【CateGory Index】: X705
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Chinese Journal Full-text Database 10 Hits
1 GUO Guang-hui1,CHEN Yu-cheng1,2(1.College of Resource and Environment,Southwest Agricultural University,Chongqing 400716,China;2.Key Lab of Agricultural resources and Environment,Chongqing 400716,China);Studies on Treatment Technologies of Municipal Domestic Refuse Leachate[J];Environmental Science and Management;2006-01
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