Effects of extracellular polymeric substances on aerobic granulation in sequencing batch reactors.
The effects of extracellular polymeric substances on aerobic granulation in sequencing batch reactors were investigated by evaluating the content and compositions of extracellular polymeric substances, and the relationship between extracellular polymeric substances composition and surface properties of glucose-fed aerobic granules. The results showed that extracellular polymeric substances could affect surface properties of cells, such as surface charge and hydrophobicity, enhance polymeric interaction and promote aerobic granulation. Moreover, extracellular polymeric substances were produced mainly in the exponential phase, and served as carbon and energy source in starvation phase during granulation process, thus regulating the growth of bacteria in the interior and exterior of granules, and maintaining the integrality of granules.
Wang
Zhiping
Z
Department of Environmental Science and Engineering, School of Civil and Environmental Engineering, Harbin Institute of Technology, PR China.
Liu
Lili
L
Yao
Jie
J
Cai
Weimin
W
D000332:Aerobiosis; D001419:Bacteria / Q000378:metabolism; D001426:Bacterial Proteins / Q000032:analysis; D001704:Biopolymers / Q000032:analysis / Q000378:metabolism*; D019149:Bioreactors; D005427:Flocculation; D057927:Hydrophobic and Hydrophilic Interactions; D011135:Polysaccharides, Bacterial / Q000032:analysis; D012722:Sewage / Q000382:microbiology; D013499:Surface Properties; D014865:Waste Disposal, Fluid / Q000379:methods
D001426:Bacterial Proteins; D001704:Biopolymers; D011135:Polysaccharides, Bacterial; D012722:Sewage