scholarly journals Nitrogen removal, nitrous oxide emission and microbial community in sequencing batch and continuous-flow intermittent aeration processes

2018 ◽  
Vol 24 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Yuepeng Sun ◽  
Liwei Xin ◽  
Guangxue Wu ◽  
Yuntao Guan
Keyword(s):  
Nitrous Oxide ◽  
Microbial Community ◽  
Nitrogen Removal ◽  
Continuous Flow ◽  
Nitrous Oxide Emission ◽  
Intermittent Aeration

Does intermittent aeration and/or an influent distributary affect nitrogen removal and nitrous oxide emission of an ecological soil wastewater infiltration system?

2019 ◽  
Vol 79 (7) ◽  
pp. 1417-1425 ◽  
Author(s):  
Yue Zhao ◽  
Zhiyu Zhang ◽  
Ziqi Li ◽  
Shiyao Wang ◽  
Chaoquan Tan ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Removal ◽  
Emission Rate ◽  
N2o Emission ◽  
Functional Genes ◽  
Intermittent Aeration ◽  
Anaerobic Conditions ◽  
N Removal ◽  
The Matrix ◽  
Removal Efficiencies

Abstract The effect of intermittent aeration and an influent distributary on NH4+-N removal, total nitrogen (TN) removal, nitrous oxide (N2O) emission and the abundances of nitrogen removal and N2O emission functional genes in four types of ecological soil wastewater infiltration systems (ESWISs) (which were conventional ESWIS 1 (operated without aeration and influent distributary), ESWIS 2 (operated with intermittent aeration), ESWIS 3 (operated with influent distributary) and ESWIS 4 (operated with intermittent aeration and influent distributary)) were studied. Intermittent aeration in ESWIS 2 and 4 created aerobic conditions above 50 cm depth of the matrix and anoxic or anaerobic conditions in the lower matrix (below 80 cm depth). ESWIS 4 improved NH4+-N (to 90.1%) and TN (to 87.8%) removal efficiencies and increased the abundances of eight nitrogen removal and N2O emission functional genes (amoA, nxrA, narG, napA, nirS, nirK, qnorB and nosZ) in contrast with other ESWISs. The combination of intermittent aeration and influent distributary achieved the lowest N2O emission rate of 34.7 mg/(m2 d) in ESWIS 4. Intermittent aeration combined with influent distributary was recommended for ESWISs to enhance nitrogen removal and reduce N2O emission.

Nitrogen Removal and Nitrous Oxide Emission in an Anaerobic/Oxic/Anoxic Sequencing Biofilm Batch Reactor

2018 ◽  
Vol 35 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Guanghuan Ge ◽  
Jianqiang Zhao ◽  
Aixia Chen ◽  
Bo Hu ◽  
Ying Chen ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Removal ◽  
Batch Reactor ◽  
Nitrous Oxide Emission

Biological iron nitrogen cycle in ecological floating bed: Nitrogen removal improvement and nitrous oxide emission reduction

2021 ◽  
Vol 268 ◽  
pp. 115842
Author(s):  
Shanshan Sun ◽  
Xushun Gu ◽  
Manping Zhang ◽  
Li Tang ◽  
Shengbing He ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Removal ◽  
Nitrogen Cycle ◽  
Emission Reduction ◽  
Nitrous Oxide Emission

Nitrogen removal enhancement and nitrous oxide emission reduction by activated sludge with pulse aeration

2019 ◽  
Vol 129 ◽  
pp. 40-46 ◽  
Author(s):  
Bao-Cang Han ◽  
Wei-Li Jiang ◽  
Hong-Ling Zhang ◽  
Shu-Lin Wei ◽  
Rong Liu ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Activated Sludge ◽  
Nitrogen Removal ◽  
Emission Reduction ◽  
Nitrous Oxide Emission
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