Optimization of hydraulic shear parameters and reactor configuration in the aerobic granular sludge process
The hydraulic shear acts as an important selection pressure in aerobic sludge granulation. The effects of the hydraulic shear rate and reactor configuration on structural characteristics of aerobic granule in view of the hydromechanics. The hydraulic shear analysis was proposed to overcome the limit...
| Veröffentlicht in: | Environmental technology. - 1998. - 36(2015), 13-16 vom: 14. Juli, Seite 1605-11 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2015
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| Zugriff auf das übergeordnete Werk: | Environmental technology |
| Schlagworte: | Journal Article Research Support, Non-U.S. Gov't aerobic granule bioreactor hydraulic shear parameters hydromechanics optimization Aniline Compounds Sewage Water Pollutants, Chemical mehr... |
| Zusammenfassung: | The hydraulic shear acts as an important selection pressure in aerobic sludge granulation. The effects of the hydraulic shear rate and reactor configuration on structural characteristics of aerobic granule in view of the hydromechanics. The hydraulic shear analysis was proposed to overcome the limitation of using superficial gas velocity (SGV) to express the hydraulic shear stress. Results showed that the stronger hydraulic shear stress with SGV above 2.4 cm s(-1) promoted the microbial aggregation, and favoured the structural stability of the granular sludge. According to the hydraulic shear analysis, the total shear rate reached (0.56-2.31)×10(5) s(-1) in the granular reactor with a larger ratio of height to diameter (H/D), and was higher than that in the reactor with smaller H/D, where the sequencing airlift bioreactor with smaller H/D had a high total shear rate under the same SGV. Results demonstrated that the granular reactor could provide a stronger hydraulic shear stress which promotes the formation and structural stability of aerobic granules |
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| Beschreibung: | Date Completed 10.09.2015 Date Revised 26.03.2015 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 0959-3330 |
| DOI: | 10.1080/09593330.2014.998717 |