Enhanced nitrogen removal of low C/N domestic wastewater using a biochar-amended aerated vertical flow constructed wetland

Enhanced nitrogen removal of low C/N wastewater using a novel microbial fuel cell (MFC) with Cupriavidus sp. S1 as a biocathode catalyst (BCS1)

“…Meanwhile, during the reaction, suspended biofilms were obviously observed in the anode chamber, which continuously converted sodium acetate into inorganic matter and simultaneously generated power in the presence of sufficient amount of substrate. Similar results were reported in previous studies . Additionally, it is worth mentioning that the potential of the anode at 100 Ω was lower than at 200 and 500 Ω.…”

“…In addition, with oxygen, nitrate and nitrite serving as the electron acceptors at the beginning of the experiment, power generation increased as external loads decreased. The maximum current density of 7583.89 ± 318.11 mA m −3 observed at 100 Ω was approximately 1 31. and 2.15 times higher than the values recorded at 200 Ω (5768.35 ± 265.27 mA m −3 ) and 500 Ω (3530.96 ± 216.15 mA m −3 )…”

“…Similar results were reported in previous studies. 24,30,31 Additionally, it is worth mentioning that the potential of the anode at 100 Ω was lower than at 200 and 500 Ω. The possible reason for this finding was that the performance of electroactive microorganisms was enhanced at low resistance as the experiment proceeded.…”

Nitrogen Removal and N2O Emission in Biochar‐Sludge Subsurface Wastewater Infiltration Systems

“…Recently, many researches have chosen biochar or sludge as external carbon sources to boost the denitrification for wastewater treatment Li et College of Life Science, Shenyang Normal University, Shenyang 110034, China. al., 2013;Sun et al, 2018;Zhou et al, 2017;. Biochar, a carbon-rich solid product of pyrolysis of agricultural biomass waste, has high porosity, large surface area, and cation exchange capacity.…”

“…Biochar, a carbon-rich solid product of pyrolysis of agricultural biomass waste, has high porosity, large surface area, and cation exchange capacity. It is increasingly being recognized as a multifunctional material for environmental applications, such as removal of organic and inorganic contaminants from wastewater and polluted soils (Sun et al, 2018;Xu et al, 2014;Zhou et al, 2017). Furthermore, the addition of biochar to wastewater treatment could reduce CO 2 , CH 4 , and N 2 O emissions (Zhou et al, 2018).…”