Journal
BIORESOURCE TECHNOLOGY
Volume 247, Issue -, Pages 776-783Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.09.088
Keywords
Aerobic granular sludge; Continuous-flow reactor with two-zone sedimentation tank; Micropowder; Selection pressure; Real and low-strength wastewater
Funding
- National Natural Science Foundation of China [51478433]
- China Postdoctoral Science Foundation [2017M612032]
Ask authors/readers for more resources
A continuous-flow reactor with two-zone sedimentation tank (CFR-TST) was developed to evaluate the formation of aerobic granular sludge (AGS). Micropowder made of excess sludge was added for a while in the CFR-TST, and selection pressure associated with settling time was created by the two-zone sedimentation tank. To avoid AGS disintegration, an airlift system for sludge return was used. The results show that AGS (mean particle size of 105 mu m; sludge volume index of approximately 26 mL/g) was formed successfully in the CFR-TST. The micropowder induced bacterial attachment by acting as nuclei. The two-zone sedimentation tank made the well settling granules (i.e., heavy sludge) always retained in the CFR and poorly settling flocs (i.e., light sludge) washed away. After granulation, the contents of extracellular polymeric substances and metal precipitations in sludge increased, and the microbial community changed obviously. Additionally, the effluent concentrations of CODCr and NH4+-N were relatively low after granulation.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available