Format

Send to

Choose Destination
See comment in PubMed Commons below
Water Sci Technol. 2013;67(9):1887-93. doi: 10.2166/wst.2013.066.

N2O emission from full-scale urban wastewater treatment plants: a comparison between A(2)O and SBR.

Author information

1
Beijing Forestry University, Beijing, China.

Abstract

The emission of nitrous oxide (N2O) from full-scale anoxic/anaerobic/oxic (A(2)O) and sequencing batch reactor (SBR) processes was measured to evaluate N2O emission from urban wastewater treatment plants (WWTPs). The results showed that N2O flux in the A(2)O WWTP followed an order of A(2)O-oxic zone > aerated grit tank >> A(2)O-anaerobic zone > A(2)O-anoxic zone > final clarifier > primary clarifier, while in the SBR WWTP the order was SBR tank >> swirl grit tank > wastewater distribution tank and within the SBR tank in an order of SBR-feeding period > SBR-aeration period > SBR-settling period > SBR-decanting period. N2O emission from the A(2)O WWTP was approximately 486.61 kg d(-1), 96.9% of which was from the A(2)O-oxic zone. In the SBR WWTP, the emission of N2O was 339.24 kg d(-1) with 99.9% of the total emission coming from the periods of feeding and aeration. There was 6.52% of nitrogen-load in the influent being transformed to the emitted N2O in the SBR WWTP; the percentage was 3.35 times higher than that in the A(2)O WWTP.

PMID:
23656929
DOI:
10.2166/wst.2013.066
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Support Center