DOI: 10.1016/j.watres.2017.12.028
Scopus记录号: 2-s2.0-85042291175
论文题名: Selenite reduction and ammoniacal nitrogen removal in an aerobic granular sludge sequencing batch reactor
作者: Nancharaiah Y.V. ; Sarvajith M. ; Lens P.N.L.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 131 起始页码: 131
结束页码: 141
语种: 英语
英文关键词: Aerobic granules
; Biogenic Se(0) nanospheres
; Nitrogen removal
; Nitrogen removal via nitrite
; Selenite bioreduction
; Selenium bioremediation
Scopus关键词: Activated sludge process
; Batch reactors
; Bioremediation
; Energy dispersive spectroscopy
; Granular materials
; Granulation
; Leachate treatment
; Nanospheres
; Nitrogen
; Selenium
; Wastewater treatment
; X ray diffraction analysis
; X ray spectroscopy
; Aerobic granular sludge reactors
; Aerobic granules
; Ammoniacal nitrogen removal
; Anaerobic granular sludge
; Bio reductions
; Biological treatment process
; Energy dispersive X ray spectroscopy
; Nitrogen removal via nitrites
; Nitrogen removal
; ammonia
; nanosphere
; nitrogen
; selenite
; activated sludge
; aeration
; ammonium compound
; anoxic conditions
; bioreactor
; bioremediation
; concentration (composition)
; effluent
; experimental study
; nanoparticle
; nitrogen
; oxic conditions
; pollutant removal
; reduction
; selenite
; selenium
; wastewater
; wastewater treatment
; aeration
; anaerobic granular sludge
; Article
; Bacteroidaceae
; Betaproteobacteria
; concentration (parameters)
; controlled study
; electron
; energy dispersive X ray spectroscopy
; microbial community
; nonhuman
; particle size
; priority journal
; Rhizobiales
; Rhodobacterales
; sludge
; waste water management
; X ray diffraction
英文摘要: Simultaneous removal of selenite and ammonium by aerobic granular sludge was investigated to develop an improved biological treatment process for selenium rich wastewaters. Aerobic granules not previously exposed to selenite were able to remove selenite by converting it to elemental selenium (Se(0)) and simultaneously remove ammonium under different conditions in batch experiments. To achieve sustainable selenite and ammonium removal, an aerobic granular sludge reactor was operated in fill-and-draw mode with a cycle of anaerobic (8 h) and aeration (15 h) phases. Almost complete removal of different initial concentrations of selenite up to 100 μM was achieved in the anaerobic phase. Ammonium removal was severely inhibited when the granules were initially exposed to 1.27 mg L−1 selenite, but ammonium and total nitrogen removal efficiencies gradually improved to 100 and 98%, respectively, under selenite-reducing conditions. Selenite loading shifted ammonium removal occurring mainly during the anaerobic phase to both the anaerobic and aeration phases. Selenite was removed from the aqueous phase by converting it to nanoparticulate Se(0), which was entrapped in the granular sludge. Scanning electron microscop-energy dispersive X-ray spectroscopy and X-ray diffraction analysis confirmed the formation of Se(0) nanospheres and their retention in the granular sludge. The effluent Se ranged from 0.02 to 0.25 mg Se L−1, while treating up to 12.7 mg L−1 selenite, which is lower as compared to previous studies on selenite removal using activated sludge or anaerobic granular sludge. This study shows that aerobic granular sludge reactors are not only capable of removing toxic selenite, but offer improved treatment of Se-rich wastewaters. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113003
Appears in Collections: 气候减缓与适应
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作者单位: Biofouling and Biofilm Processes, Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, Tamil Nadu 603102, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai, 400 094, India; UNESCO-IHE Institute for Water Education, Westvest 7, Delft, AX 2611, Netherlands; Department of Microbiology, National University of Ireland, University Road, Galway, H91 TK33, Ireland
Recommended Citation:
Nancharaiah Y.V.,Sarvajith M.,Lens P.N.L.. Selenite reduction and ammoniacal nitrogen removal in an aerobic granular sludge sequencing batch reactor[J]. Water Research,2018-01-01,131