Experiment of Advanced Treatment with Anaerobic-Aerobic-Anoxic SBBR Processes for Landfill Leachate Denitrification
The traditional biochemical treatment process of landfill leachate is mainly AO,which has the problem of low removal rate of total nitrogen(TN).In order to improve the TN removal rate and removal rate of landfill leachate,sequencing batch biofilm reactor(SBBR)was used to treat the actual landfill leachate with CODCr of 7760 mg/L and TN of 1200 mg/L.The operation mode of the SBBR was anaerobic-aerobic-anoxic operation.After 85 days of start-up and acclimation without adding external carbon source,the effluent TN concentration was lower than 20 mg/L,and the removal efficiency of TN was more than 97%.Compared with sequencing batch reactor(SBR),the removal efficiency of simultaneous nitrification and denitrification(SND)was improved by adding fillers,and the period was shortened from 19.5 h to 13.75 h.High throughput analysis showed that the dominant group of SBBR was Proteobacteria(26.43%),while that of SBR was Chloroflexi(28.53%).The different dominant microbial communities may be one of the reasons why SBBR had higher nitrogen removal efficiency compared to SBR.
国家科技期刊平台
NSTL
万方数据
维普
