Reactivation of hypersaline aerobic granular sludge after low-temperature storage

Chen Yao, Zhu Jia Yue, Qin Yu, Zhang Zhi Min, Yuan Shao Chun


Chen, Y., Zhu, J. Y., Qin, Y., Zhang, Z. M., & Yuan, S. C.  (March-April, 2017). Reactivation of hypersaline aerobic  granular sludge after low-temperature storage.  Water  Technology and Sciences (in Spanish),  8 (2), 61-70.


 Reactivation of hypersaline aerobic granular sludge after  low-temperature storage was studied by slowly increasing  the organic loading. Results indicated that the basic external  features of thawed hypersaline aerobic granules were still  largely intact after a six-week low temperature storage, but  the colors and internal structure changed greatly. Aerobic  granules experienced a process of particle disintegration,  fragmentary particles, filamentous bacteria-like particles,  and dense granules during the recovery process. After  more than one-month re-cultivation, the settling property,  dehydrogenase activity, and nitrification properties of  hypersaline aerobic granules returned to normal. During  the re-cultivated process, the decentralized growth pattern  of particles can be effectively controlled, and granules can  grow compactly by controlling water alkalinity, aeration rate  and reactor settling time.  

Palabras clave

Hypersaline, aerobic granular sludge, filamentous bacteria, reactivation

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