期刊
BIORESOURCE TECHNOLOGY
卷 192, 期 -, 页码 354-360出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2015.05.013
关键词
Landfill leachate; Nitrogen removal; SBR; GAOs; FISH
资金
- Natural Science Foundation of China [51178007]
- Beijing Municipal Commission of Education - China
A modified sequencing batch reactor (SBR) operated at the anaerobic-aerobic-anoxic mode was developed in this study to fully utilize the organics in landfill leachate (ammonia concentration of 1000 +/- 50 mg N/L and COD/total nitrogen (TN) ratio of 1-4). The unique feature of modified SBR process was the addition of an anaerobic stage after feeding stage, so that microorganisms could store the organics during anaerobic stage and supply the carbon source for endogenous denitritation after aeration stage. The 70-day operational tests showed the effluent TN was below 10 mg N/L at C/N ratio of 4. The intracellular stored polymers were analyzed and the microorganisms were capable of storing the carbon source as polyhydroxybutyrate (PHB) and glycogen in anaerobic stage, which were the electron donors for endogenous denitritation. Fluorescence in situ hybridization (FISH) analysis showed that glycogen accumulating organisms (GAOs) account for 39.8% of microorganisms in SBR, and carried out advanced nitrogen removal. (C) 2015 Elsevier Ltd. All rights reserved.
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