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Effects of various pretreatments on biological sulfate reduction with waste activated sludge as electron donor and waste activated sludge diminution under biosulfidogenic condition.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2010 Jul 15; Vol. 179 (1-3), pp. 918-25. Date of Electronic Publication: 2010 Mar 27. - Publication Year :
- 2010
-
Abstract
- The current study focused on the influences of various pretreatments, including alkaline, ultrasonic and thermal pretreatments on biological sulfate reduction with waste activated sludge (WAS) as sole electron donor. Our results showed that thermal and ultrasonic pretreatments increased the sulfate reduction percentage by 14.8% and 7.1%, respectively, compared with experiment with raw WAS, while alkaline pretreatment decreased the sulfate reduction percentage by 46%. By analyzing the WAS structure, particle size distribution, organic component, and enzyme activity after different pretreatments, we studied the effects of these pretreatments on WAS as well as on the mechanisms of how biological sulfate reduction was affected. The reduction of WAS and variation of WAS structure in the process of sulfate reduction were investigated. Our results showed that biosulfidogenesis was an efficient method of diminishing WAS, and various pretreatments could enhance the reduction efficiency of volatile solid in the WAS.<br /> (2010 Elsevier B.V. All rights reserved.)
- Subjects :
- China
Chromatography, High Pressure Liquid
Electrons
Fatty Acids, Volatile analysis
Gas Chromatography-Mass Spectrometry
Hot Temperature
Hydrogen-Ion Concentration
Oxygen analysis
Particle Size
Peptide Hydrolases chemistry
alpha-Amylases chemistry
alpha-Amylases metabolism
alpha-Glucosidases chemistry
alpha-Glucosidases metabolism
Biodegradation, Environmental
Refuse Disposal methods
Sewage analysis
Sulfates chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 179
- Issue :
- 1-3
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 20395041
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2010.03.093