DOI: 10.1016/j.watres.2018.09.052
Scopus记录号: 2-s2.0-85054328540
论文题名: Controlling effluent suspended solids in the aerobic granular sludge process
作者: van Dijk E.J.H. ; Pronk M. ; van Loosdrecht M.C.M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 147 起始页码: 50
结束页码: 59
语种: 英语
英文关键词: Aerobic granular sludge
; Degasification
; Denitrification
; Effluent suspended solids
; Nitrogen gas
; Rising sludge
; Scum layer
英文摘要: The main processes contributing to elevated effluent suspended solids in the full-scale aerobic granular sludge process were studied. The two processes found to be most important were (1) rising of sludge due to degasification of nitrogen gas (produced by denitrification) and (2) wash-out of particles that intrinsically do not settle such as certain fats and foams. A mathematical model was made to describe the process of degasification of nitrogen gas during the feeding phase in an AGS reactor. The process of rising sludge due to degasification could be limited by stripping out the nitrogen gas before starting the settling phase in the process cycle. The wash-out of scum particles could be reduced by introducing a vertical scum baffle in front of the effluent weir, similar to weirs in traditional clarifiers. A full-scale Nereda® reactor in the municipality of Utrecht, The Netherlands, was operated with a nitrogen stripping phase and scum baffles for 9 months at an average biomass concentration of 10 g L−1 and an average granulation grade of 84%. In this period the influent suspended solids concentration was 230±118mgL−1 and the concentration of effluent suspended solids was 7.8±3.8mgL−1. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112364
Appears in Collections: 气候减缓与适应
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作者单位: Department of Biotechnology, Delft University of Technology, Van der Maasweg 9, Delft, HZ 2629, Netherlands; Royal HaskoningDHV, Laan 1914 35, Amersfoort, AL 3800, Netherlands
Recommended Citation:
van Dijk E.J.H.,Pronk M.,van Loosdrecht M.C.M.. Controlling effluent suspended solids in the aerobic granular sludge process[J]. Water Research,2018-01-01,147