Denitrification capacity in response to increasing nitrate loads and decreasing organic carbon contents in injected leachate of a simulated landfill reactor

Wu, Weixiang; Hao, Yong-jun; Ding, Ying; Chen, Yingxu

doi:10.1016/j.procbio.2008.12.019

Cited by 9 publications

(1 citation statement)

References 18 publications

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“…Previous study also reported that the existence of organic matter (e.g., humic and fulvic-like fractions) may inhibit formation of NO 3 − by nitrifying bacteria [22]. This result suggests that high population of nitrifying bacteria probably present at young landfill than that at old landfill due to the existence of niche environment at young landfill that promote growth rate of nitrification bacteria (e.g., pH, organic matter and soil properties) [4,5,23,24]. Figure 1 also shows the pH of leachate at Ayer Hitam landfill and Jeram landfill were at pH 8 and 7, respectively.…”

Section: Characterization Of Leachate In Ayer Hitam and Jeram Landfillsmentioning

confidence: 79%

Removal of Nitrate by Eichhornia crassipes sp. in Landfill Leachate

2015

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− . This study shows that concentration of NO 3 − was higher in young landfill (27 mg/L) than that in old landfill (9 mg/L) at neutral pH. Finding of these results indicate that Eichhornia crassipes sp. has the ability to remove NO 3 − at different concentrations in three days. Approximately 69 and 64 % of NO 3 − that present in leachate from young landfill was removed in sample without dilution and 50 % dilution, respectively. While approximately 28 and 33.6 % of NO 3 − present in leachate collected from old landfill was removed in similar dilution samples. This study is very significant to identify the capability of Eichhornia crassipes sp. to remove NO 3 − in landfill leachate.

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