DocumentCode
527057
Title
Notice of Retraction
Cultivation of aerobic granular sludge in sequencing batch reactor with short cycle
Author
Huaji Ma ; Shuting Zhang
Author_Institution
Sch. of Environ. Sci. & Eng., Tianjin Univ., Tianjin, China
Volume
1
fYear
2010
fDate
17-18 July 2010
Firstpage
801
Lastpage
804
Abstract
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
In a sequencing batch reactor (SBR) with 2.5h operation cycle, aerobic granular sludge (AGS) was developed successfully. The main diameter and sludge volume index (SVI) of AGS cultivated were 1~3 mm and 33 ml g-1. There were significant effects of pH value on aerobic granulation. The dosage of 300 mgNaHCO3 l-1 to influent could avoid the overgrowth of filamentous bacteria in bioreactor. Aerobic granulation improved largely the metabolic activities of microorganisms in sludge. The oxygen uptake rate (OUR) of AGS reached 55 mgO2 l-1 h-1. The AGS developed can quickly remove most of nutrients in sewage. For low strength sewage, the removal efficiencies of COD, NH4+-N and TP were 91.1%, 99.0%, and 98.8%, respectively; while for strong sewage, the SBR with AGS cultivated was an excellent pretreatment process.
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
In a sequencing batch reactor (SBR) with 2.5h operation cycle, aerobic granular sludge (AGS) was developed successfully. The main diameter and sludge volume index (SVI) of AGS cultivated were 1~3 mm and 33 ml g-1. There were significant effects of pH value on aerobic granulation. The dosage of 300 mgNaHCO3 l-1 to influent could avoid the overgrowth of filamentous bacteria in bioreactor. Aerobic granulation improved largely the metabolic activities of microorganisms in sludge. The oxygen uptake rate (OUR) of AGS reached 55 mgO2 l-1 h-1. The AGS developed can quickly remove most of nutrients in sewage. For low strength sewage, the removal efficiencies of COD, NH4+-N and TP were 91.1%, 99.0%, and 98.8%, respectively; while for strong sewage, the SBR with AGS cultivated was an excellent pretreatment process.
Keywords
bioreactors; microorganisms; sewage treatment; aerobic granular sludge cultivation; bioreactor; filamentous bacteria; oxygen uptake rate; removal efficiencies; sequencing batch reactor; sewage pretreatment process; Construction industry; Substrates; aerobic granular sludge (AGS); cultivation; oxygen uptake rate (OUR); sequencing batch reactor (SBR); short cycle;
fLanguage
English
Publisher
ieee
Conference_Titel
Environmental Science and Information Application Technology (ESIAT), 2010 International Conference on
Conference_Location
Wuhan
Print_ISBN
978-1-4244-7387-8
Type
conf
DOI
10.1109/ESIAT.2010.5567454
Filename
5567454
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