DocumentCode
527266
Title
Notice of Retraction
Upgrading of anaerobic digestion of thickened waste activated sludge by microwave-assisted alkali pretreatment
Author
Yong-Zhi Chi ; Xue-Ning Fei ; Hong-Ying Yuan ; Shao-Po Wang ; Yu-You Li ; Jian-Xing Li
Author_Institution
Dept. of Environ. & Municipal Eng., Tianjin Inst. of Urban Constr., Tianjin, China
Volume
1
fYear
2010
fDate
17-18 July 2010
Firstpage
316
Lastpage
320
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.
Pretreatment of thickened waste activated sludge (TWAS) can facilitate the hydrolysis step of mesophilic anaerobic digestion (MAD) and improves the digestibility. This study examined the effects of microwave/alkali pretreatment on TWAS disintegration and its subsequent batch and semi-continuous MAD. The maximum solubilization ratio of volatile suspended solids, 77%, achieved at 210°C with 0.15 g-NaOH/g-TSS and 10 min holding time. In the biochemical methane potential tests, the vials fed with pretreated TWAS produced 18-46% higher biogas compared to the control. The semi-continuous reacter fed with the pretreated TWAS without neutralization was stable, and the VS reductions and methane yield were 21% and 14% higher than those of the control, respectively.
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.
Pretreatment of thickened waste activated sludge (TWAS) can facilitate the hydrolysis step of mesophilic anaerobic digestion (MAD) and improves the digestibility. This study examined the effects of microwave/alkali pretreatment on TWAS disintegration and its subsequent batch and semi-continuous MAD. The maximum solubilization ratio of volatile suspended solids, 77%, achieved at 210°C with 0.15 g-NaOH/g-TSS and 10 min holding time. In the biochemical methane potential tests, the vials fed with pretreated TWAS produced 18-46% higher biogas compared to the control. The semi-continuous reacter fed with the pretreated TWAS without neutralization was stable, and the VS reductions and methane yield were 21% and 14% higher than those of the control, respectively.
Keywords
biochemistry; biofuel; microwave heating; natural gas technology; sludge treatment; biochemical methane potential tests; biogas; hydrolysis; microwave-alkali pretreatment; microwave-assisted alkali pretreatment; semicontinuous mesophilic anaerobic digestion; semicontinuous reacter; sludge disintegration; solubilization ratio; temperature 210 degC; thickened waste activated sludge; volatile suspended solids; Inductors; mesophilic anaerobic digestion; microwave/alkali pretreatment; thickened waste activated sludge;
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.2010.5568568
Filename
5568568
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