Aerobic sludge Granulation in a Reverse Flow Baffled Reactor(RFBR)Operated in Continuous-flow Mode for Wastewater Treatment
A novel Reverse Flow Baffled Reactor(RFBR)was proposed for aerobic sludge granulation in continuous-flow mode.Municipal wastewater was fed in a 120 L reactor and successfully produced aerobic granules revealing a sludge volume index(SVI)value of 33 mL/g.Aerobic granules possessed higher extracellular polymeric substances(EPS)content than seed sludge.The ratio of protein/polysaccharide(PN/PS)in EPS was about 10.Bacterial community analysis revealed that most species(Bacteroidetes,Nitrospirae and Proteobacteria)from seed sludge were preserved in the reactor except Pedobacter sp.Moreover,different bacterial species in granules were identified from RFBR and SBR due to different operation modes.Raw wastewater had a positive effect on sludge granulation.However,the RFBR was operated in periodic feast-famine condition,short settling time,high height/diameter(H/D)ratio,and without sludge return pump,which led to successful granulation in continuous-flow mode.
Aerobic granules Continuous-flow RFBR SBR Microbial community
Jun Li Ang Cai Libin Ding Balasubramanian Sellamuthu Jonathan Perreault
College of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou,310014,Zhej College of Civil Engineering and Architecture,Zhejiang University of Technology,Hangzhou,310014,Zhej INRS-Institute Armand-Frappier,Laval,Quebec,H7V 1B7,Canada
国内会议
宁波
英文
214-227
2017-10-01(万方平台首次上网日期,不代表论文的发表时间)