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- Title
Promotion and inhibition of oxygen transfer under fine bubble aeration by activated sludge.
- Authors
Fan, Haitao; Qi, Lu; Liu, Guo‐hua; Zhang, Yuankai; Chen, Xulu; Wang, Hongchen
- Abstract
The promotion and inhibition of inactivated and activated sludge on oxygen mass transfer ( OMT) were studied using lab-scale experiments. The results showed that the α-values and oxygen transfer efficiency ( OTE) decreased with increasing mixed liquor suspended solids ( MLSS) concentration (1-10 g/L). Although OMT promotion rate by microbial respiration in activated sludge system increased from 39.8-97.5% for the α-values and OTE, the two parameters were found to fall sharply when MLSS concentration was over 5 g/L. This indicated that the sludge concentration is a major influence factor on OMT in activated sludge system. Such results provide valuable knowledge for the operating optimization of the aeration system in wastewater treatment process.
- Subjects
ACTIVATED sludge process; WATER aeration; WATER purification; INDUSTRIAL use of oxygen; SEWAGE purification
- Publication
Water & Environment Journal, 2014, Vol 28, Issue 3, p434
- ISSN
1747-6585
- Publication type
Article
- DOI
10.1111/wej.12061