Abstract：
:Microbial selection pressure is traditionally supposed as a prerequisite for aerobic granulation. This work gives a different insight on this issue. Fluorescent microspheres were used to label the flocculent biomass granulation for a period of 47days in a continuous-flow bioreactor. Analysis of the distribution of fluorescent microspheres in granules revealed that the terminal phase of granulation is in a dynamic steady state, where bioflocs detach, collide and aggregate randomly. This revealed that the un-granulated biomass was the result of the dynamic aggregation and breakage, rather than the microbial species unable to be granulated. Furthermore, denaturing gradient gel electrophoresis (DGGE) profile and UPGMA dendrogram results showed similar microbial communities during the granulation. To sum up, microbial selection pressure was not a prerequisite for aerobic granulation from both of the dynamic granulation steps and molecular biology aspects.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Zhou D,Niu S,Xiong Y,Yang Y,Dong Sdoi
10.1016/j.biortech.2014.03.001subject
Has Abstractpub_date
2014-06-01 00:00:00pages
102-8eissn
0960-8524issn
1873-2976pii
S0960-8524(14)00300-9journal_volume
161pub_type
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