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@ARTICLE{VanNguyen:837564,
      author       = {Van Nguyen, Quan and Jensen, Lars Stoumann and Bol, Roland
                      and Wu, Di and Triolo, Jin Mi and Vazifehkhoran, Ali
                      Heidarzadeh and Bruun, Sander},
      title        = {{B}iogas {D}igester {H}ydraulic {R}etention {T}ime
                      {A}ffects {O}xygen {C}onsumption {P}atterns and {G}reenhouse
                      {G}as {E}missions after {A}pplication of {D}igestate to
                      {S}oil},
      journal      = {Journal of environmental quality},
      volume       = {46},
      number       = {5},
      issn         = {0047-2425},
      address      = {Madison, Wis.},
      publisher    = {ASA [u.a.]},
      reportid     = {FZJ-2017-06452},
      pages        = {1114-1122},
      year         = {2017},
      abstract     = {Knowledge about environmental impacts associated with the
                      application of anaerobic digestion residue to agricultural
                      land is of interest owing to the rapid proliferation of
                      biogas plants worldwide. However, virtually no information
                      exists concerning how soil-emitted N2O is affected by the
                      feedstock hydraulic retention time (HRT) in the biogas
                      digester. Here, the O2 planar optode technique was used to
                      visualize soil O2 dynamics following the surface application
                      of digestates of the codigestion of pig slurry and
                      agro-industrial waste. We also used N2O isotopomer analysis
                      of soil-emitted N2O to determine the N2O production
                      pathways, i.e., nitrification or denitrification.
                      Two-dimensional images of soil O2 indicated that anoxic and
                      hypoxic conditions developed at 2.0- and 1.5-cm soil depth
                      for soil amended with the digestate produced with 15-d
                      (PO15) and 30-d (PO30) retention time, respectively. Total
                      N2O emissions were significantly lower for PO15 than PO30
                      due to the greater expansion of the anoxic zone, which
                      enhanced N2O reduction via complete denitrification.
                      However, cumulative CO2 emissions were not significantly
                      different between PO15 and PO30 for the entire incubation
                      period. During incubation, N2O emissions came from both
                      nitrification and denitrification in amended soils.
                      Increasing the HRT of the biogas digester appears to induce
                      significant N2O emissions, but it is unlikely to affect the
                      N2O production pathways after application to soil.},
      cin          = {IBG-3},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:28991980},
      UT           = {WOS:000411433900022},
      doi          = {10.2134/jeq2017.03.0117},
      url          = {https://juser.fz-juelich.de/record/837564},
}