The effect of salinity shock on nitrogen removal via nitrite of advanced landfill leachate using UASB-A/O process
Saline mature landfill leachate is treated using an up-flow anaerobic sludge blanket(UASB) combine with an anoxic/aerobic reactor (A/O). The influence of salinity shocks from 10g/L to 35g/L on the performance of the system and characteristics of the activated sludge has been studied. Results indicate that the removal efficiency of total nitrogen(TN) and ammonium nitrogen(NH4+-N) were decreased by 13.5％ and 12.1％, respectively, whereas the removal efficiency of chemical oxygen demand(COD) was affected slightly; the degradation of different pollutants in the system is not completely independent but a unified whole; the anaerobic particulate sludge in UASB has stronger ability of resistance for salinity shocks compared with the aerobic sludge in A/O; pH value is the better choice as the fuzzy-control parameter in A/O treating landfill leachate containing saline compared to dissolved oxygen(DO); the free ammonia(FA) concentration in A/O was increased and the nitrite accumulation rate of the effluent gets small range of ascension under the dual inhibitions of salinity and FA.
salinity shocks nitrogen removal landfill leachate UASB-A/O
Tiantian Liu Yongzhen Peng Mu Liu Yanjie Song Bo Wang
Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering Beijing University of Technology Beijing, China
国际会议
三峡
英文
3586-3589
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）