Enhanced storage stability of aerobic granules seeded with pellets.
The responses of two different types of aerobic granules to storage, granule A seeded with activated sludge flocs and granule B seeded with pellets (cells), were investigated in this study. After 3-week storage, the surface of granule B remained compact and smooth while obvious crevices were observed on that of granule A. Compared with granule B, granule A had more decrease in biomass concentration, settleability, hydrophobicity, and extracellular polymeric substances (EPS) concentration after the storage. Results indicated that the stability loss of aerobic granules could be related to protein concentration decrease in the TB-EPS fraction and to protein framework disintegration in whole granule. Compared with aerobic granules seeded with activated sludge flocs, those seeded with pellets were more resistant against storage, and thus would have greater potential in practical applications.
Xu
Hua-Cheng
HC
State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China.
He
Pin-Jing
PJ
Wang
Guan-Zhao
GZ
Yu
Guang-Hui
GH
Shao
Li-Ming
LM
D000332:Aerobiosis; D001709:Biotechnology / Q000379:methods*; D005591:Chemical Fractionation; D005110:Extracellular Space / Q000737:chemistry; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D009930:Organic Chemicals / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D009930:Organic Chemicals; D011134:Polysaccharides; D012722:Sewage