Abstract:
:A laboratory-scale aerobic fluidized bed biofilm reactor (AFBBR) was established to evaluate the oxygen mass transfer (OMT) process and its impact on municipal wastewater treatment performance. Aeration rates had different effects on the OMT of the wastewater and biofilm. In the wastewater, oxygenation performance, oxygen uptake rate (OUR), and volumetric OMT coefficient (kLa) improved under high aeration rates. However, within the biofilm, the OMT process under the aeration rate of 0.096 L/(min·L) were higher than under other conditions [0.064 L/(min·L) and 0.128 L/(min·L)]. The denitrifying bacteria (DNB) abundance under the aeration rate of 0.096 L/(min·L) were improved so that total nitrogen (TN, 66.98 ± 4.23%) and ammonia nitrogen (NH4+-N, 74.70 ± 2.30%) removal were higher than those under other aeration conditions. These results showed that suitable aeration could improve wastewater treatment efficiency through changing the OMT process and microbial community structure.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Ren J,Cheng W,Jiao M,Wan T,Wang M,Li Ddoi
10.1016/j.biortech.2020.124552subject
Has Abstractpub_date
2020-12-16 00:00:00pages
124552eissn
0960-8524issn
1873-2976pii
S0960-8524(20)31826-5journal_volume
323pub_type
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