Journal
BIORESOURCE TECHNOLOGY
Volume 212, Issue -, Pages 296-301Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.04.041
Keywords
Landfill leachate; Short-cut nitrification; Anaerobic ammonia oxidation (anammox); Upflow anaerobic sludge blanket reactor (UASB); Electrochemical oxidation
Funding
- National Natural Science Foundation of China [51208040]
- Beijing Nova Program - China [Z131109000413008]
- China Postdoctoral Science Foundation [2013M541382]
- National Undergraduate Training Program for Innovation and Entrepreneurship [2016J00028, 2015J00050, 2014J00057]
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A cost-effective process, consisting of a denitrifying upflow anaerobic sludge blanket (UASB), an oxygen limited anoxic/aerobic (A/O) process for short-cut nitrification, and an anaerobic reactor (ANR) for anaerobic ammonia oxidation (anammox), followed by an electrochemical oxidation process with a Ti-based SnO2-Sb2O5 anode, was developed to remove organics and nitrogen in a sewage diluted leachate. The final chemical oxygen demand (COD), ammonia nitrogen (NH4+-N) and total nitrogen (TN) of 70, 11.3 and 39 (all in mg/L), respectively, were obtained. TN removal in UASB, A/0 and ANR were 24.6%, 49.6% and 16.1%, respectively. According to the water quality and molecular biology analysis, a high degree of anammox besides short-cut nitrification and denitrification occurred in A/0. Counting for 16.1% of TN removal in ANR, at least 43.2-49% of TN was removed via anammox. The anammox bacteria in A/0 and ANR, were in respective titers of (2.5-5.9) x 10(9) and 2.01 x 10(10) copy numbers/(g SS). (C) 2016 Elsevier Ltd. All rights reserved.
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