Nitrogen Removal and N 2 O Emission in Biochar‐Sludge Subsurface Wastewater Infiltration Systems

Nitrogen Removal and N 2 O Emission in Biochar‐Sludge Subsurface Wastewater Infiltration Systems

Nitrogen removal and N 2 O emission of biochar‐sludge amended subsurface wastewater infiltration systems (SWISs) with/without intermittent aeration under different organic surface loading rates (OSLRs) were investigated. Under OSLR, between 8.5 and 54.6 g COD/(m 2 d), average chemical oxygen demand...

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Veröffentlicht in:Water environment research 2018-09, Vol.90 (9), p.800-806
Hauptverfasser: Qi, Shiyue, Zhao, Yue, Wang, Shiyao, Zheng, Fanping, Pan, Jing, Fan, Linlin, Li, Zhiqi, Tan, Chaoquan, Hou, Wanyuan
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container_end_page 806
container_issue 9
container_start_page 800
container_title Water environment research
container_volume 90
creator Qi, Shiyue
Zhao, Yue
Wang, Shiyao
Zheng, Fanping
Pan, Jing
Fan, Linlin
Li, Zhiqi
Tan, Chaoquan
Hou, Wanyuan
description Nitrogen removal and N 2 O emission of biochar‐sludge amended subsurface wastewater infiltration systems (SWISs) with/without intermittent aeration under different organic surface loading rates (OSLRs) were investigated. Under OSLR, between 8.5 and 54.6 g COD/(m 2 d), average chemical oxygen demand (COD), NH + 4 ‐N, and total nitrogen (TN) removal rates decreased with OSLR increasing in non‐aerated SWISs amended with/without biochar‐sludge; increasing OSLR hardly affected COD and NH + 4 ‐N, removal in biochar‐sludge amended SWIS with intermittent aeration; N 2 O emission rate decreased with influent OSLR increasing in the SWISs. Biochar‐sludge amended SWIS with intermittent aeration obtained higher removal rates for COD (94.9 to 95.5%), NH + 4 ‐N, (90.5 to 93.7%), TN (86.5 to 89.9%) and lower N 2 O emission rates [13.4 to 14.7 mg/(m 2 d)] under high influent OSLR of 36.2 and 54.6 g COD/(m 2 d) were compared with non‐aerated SWISs with/without biochar‐sludge. Furthermore, the abundances of amoA, nxrA, napA, narG, nirS, nirK, qnorB, and nosZ genes involved in nitrogen removal were enhanced under high influent OSLR in biochar‐sludge amended SWIS with intermittent aeration.
doi_str_mv 10.2175/106143017X15131012187935
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Furthermore, the abundances of amoA, nxrA, napA, narG, nirS, nirK, qnorB, and nosZ genes involved in nitrogen removal were enhanced under high influent OSLR in biochar‐sludge amended SWIS with intermittent aeration.</abstract><doi>10.2175/106143017X15131012187935</doi><tpages>7</tpages></addata></record>
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title Nitrogen Removal and N 2 O Emission in Biochar‐Sludge Subsurface Wastewater Infiltration Systems
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