| Title |
Morphological Characteristics of Granular Sludge in dPAO SBR |
| Authors |
유태욱 ( Tae Uk Yoo ) ; 이한샘 ( Han Saem Lee ) ; 윤금의 ( Geum Hee Yun ) ; 윤주환 ( Zu Whan Yun ) |
| Keywords |
Aerobic granular sludge; denitrifying phosphorus accumulating organism; dPAO; hydroxyapatitie; HAP; Morphology; sequencing batch reactor; SBR |
| Abstract |
The morphological characteristics of granules, which were generated in lab-scale sequencing batch reactor (SBR) for simultaneous nitrogen and phosphorus removal with denitrifying phosphorus accumulating organism (dPAO) were identified. Granular sludge was fully developed in the anaerobic-anoxic (An-Ax) SBR after 180 days of SBR operation. The average diameter of granular sludge was 2.2 mm and rod-type organisms dominated in the granules. In addition, about 1.0 mm of white precipitate was observed in the core of the granule, and the material was confirmed that it is very similar to hydroxyapatite (HAP; Ca5(PO4)3(OH)) by X-ray diffraction) analysis. |