A fancy eco-compatible wastewater treatment system: Green Bio-sorption Reactor.
A novel concept was proposed and preliminarily investigated by embedding alum sludge-based constructed wetland into conventional activated sludge system in terms of Green Bio-sorption Reactor (GBR). This novel GBR inherited the aesthetic value of constructed wetland and owned the robust phosphorus (P) adsorption along with the benefit of carriers' addition (dewatered alum sludge). The preliminary demonstration was conducted in a lab-scale sequencing batch reactor (SBR) system without biological phosphorus removal process. The novel process achieved averagely 96%, 99% and 90% for BOD, TP and TN removal with piggery wastewater as influent, demonstrating for the first time of its promising performance. Moreover, the coexistence of biofilm and suspended sludge also achieved 55-88% simultaneous nitrification and denitrification efficiency, higher than biofilm only. Overall, alum sludge-based GBR could achieve reliable pollutants removal and provides a novel and sustainable pathway to upgrade conventional activated sludge system.
School of Civil Engineering and Architecture, Xi'an University of Technology, Xi'an 710048, Shaanxi, PR China; UCD Dooge Centre for Water Resources Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
Yaqian
Y
Zhao
UCD Dooge Centre for Water Resources Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland. Electronic address: ranbin.liu@hotmail.com.
Ranbin
R
Liu
College of Urban Construction, Nanjing Tech University, Nanjing 211816, PR China.
Jinhui
J
Zhao
UCD Dooge Centre for Water Resources Research, School of Civil Engineering, University College Dublin, Belfield, Dublin 4, Ireland.
Lei
L
Xu
Ecole des Mines de Nantes, Energy Systems Environment Department, 4 rue Afred Kastler, BP 20722, 44307 Nantes Cedex 3, France.
Caroline
C
Sibille
D019149:Bioreactors; D058465:Nitrification; D009584:Nitrogen; D010758:Phosphorus / Q000378:metabolism; D012722:Sewage; D014865:Waste Disposal, Fluid; D062065:Wastewater; D053833:Wetlands
D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater
Activated sludge; Alum sludge; Constructed wetland; Phosphorus removal; Simultaneous nitrification and denitrification