Achieving nitrogen removal via nitrite pathway from urban landfill leachate using the synergetic inhibition of free ammonia and free nitrous acid on nitrifying bacteria activity

Sun, HW; Bai, Y; Peng, YZ; Xie, HG; Shi, XN

HERO ID

2232700

Reference Type

Journal Article

Year

2013

Language

English

PMID

24225105

HERO ID 2232700
In Press No
Year 2013
Title Achieving nitrogen removal via nitrite pathway from urban landfill leachate using the synergetic inhibition of free ammonia and free nitrous acid on nitrifying bacteria activity
Authors Sun, HW; Bai, Y; Peng, YZ; Xie, HG; Shi, XN
Journal Water Science and Technology
Volume 68
Issue 9
Page Numbers 2035-2041
Abstract In this study, a biological system consisting of an up-flow anaerobic sludge blanket (UASB) and anoxic-oxic (A/O) reactor was established for the advanced treatment of high ammonium urban landfill leachate. The inhibitory effect of free ammonia (FA) and free nitrous acid (FNA) on the nitrifying bacterial activity was used to achieve stable nitritation in the A/O reactor. The results demonstrated that the biological system achieved chemical oxygen demand (COD), total nitrogen (TN) and NH(4)(+)-N removal efficiencies of 95.3, 84.6 and 99.2%, respectively at a low carbon-to-nitrogen ratio of 3:1. Simultaneous denitritation and methanogenesis in the UASB could improve the removal of COD and TN. Nitritation with above 90% nitrite accumulation was successfully achieved in the A/O reactor by synergetic inhibition of FA and FNA on the activity of nitrite oxidizing bacteria (NOB). Fluorescence in situ hybridization (FISH) analysis showed that ammonia oxidizing bacteria (AOB) was dominant and was considered to be responsible for the satisfactory nitritation performance.
Doi 10.2166/wst.2013.432
Pmid 24225105
Wosid WOS:000328070200018
Is Certified Translation No
Dupe Override No
Is Public Yes
Language Text English
Keyword FISH; free ammonia; free nitrous acid; landfill leachate; nitritation
Tags
IRIS
Nitrate/Nitrite