Effects of inoculated sludge on aerobic granulation in sequencing batch reactor
Date Issued
2009
Date
2009
Author(s)
Lin, Pin
Abstract
Effects of removal of extracellular polymeric substances (EPS) in activated sludges on aerobic granulation process and aerobic granulation taken sluges from two wastewater treatment plants as seeds were studied.lucose was utilized to cultivate granules in two sequencing batch reactors (SBRs) that were seeded with original sludge (S-s) or EPS-free sludge (S-p). The S-s sludge granulated in two weeks, faster than the S-p sludge did (three weeks). The fungi were predominated in the S-s system. The denaturing gradient gel electrophoresis (DGGE) results determined that Pseudoplatyophrya nana and Candida sp. BG02-6-6-1-7 appeared in the starting phase of granulation period in S-s but not in S-p sludge, probably accounting for the earlier granulation for the former system. The fungus like Opisthonecta minima and Candida solani and bacterial species like Sphaerotilus sp. appeared in the granule disintegration phase.cetate was utilized to cultivate granules in SBRs seeded with sludge and EPS-extracted sludge. The two seeds yielded similar granulation processes. Glucose-fed granules were composed of genus like Paracoccus、Acidovorax、Pseudomonas while acetate-fed granules were composed of Stenotrophomonas、Brevundimonas.
Subjects
aerobic granule
SBR
DGGE
Type
thesis
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