Efficiency of sulfamethoxazole removal from wastewater using aerobic granular sludge: influence of environmental factors

The effects of adsorption, sulfamethoxazole (SMX) content, chemical oxygen demand (COD), and dissolved oxygen (DO) are recognized to be crucial for SMX removal in the aerobic granular sludge (AGS) system. Therefore, we investigated the impact of adsorption and these three different environmental fac...

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Bibliographic Details
Published in:Biodegradation (Dordrecht) 2021-12, Vol.32 (6), p.663-676
Main Authors: Cui, Di, Chen, Zeyi, Cheng, Ximing, Zheng, Guochen, Sun, Yuan, Deng, Hongna, Li, Wenlan
Format: Article
Language:English
Subjects:
Adsorption
Antibiotics
Aquatic Pollution
Biodegradation, Environmental
Biomedical and Life Sciences
Bioreactors
Chemical oxygen demand
Community composition
Dissolved oxygen
Efficiency
Environmental conditions
Environmental factors
Flavobacterium
Geochemistry
Life Sciences
Load distribution
Loading rate
Microbial activity
Microbiology
Microorganisms
Original Paper
Oxytetracycline
Removal
Sewage
Sludge
Soil Science & Conservation
Sulfamethoxazole
Terrestrial Pollution
Thauera
Waste Disposal, Fluid
Waste Management/Waste Technology
Waste Water
Waste Water Technology
Wastewater
Wastewater treatment
Water Management
Water Pollution Control
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Summary:The effects of adsorption, sulfamethoxazole (SMX) content, chemical oxygen demand (COD), and dissolved oxygen (DO) are recognized to be crucial for SMX removal in the aerobic granular sludge (AGS) system. Therefore, we investigated the impact of adsorption and these three different environmental factors on the SMX removal loading rate and removal efficiency of an AGS system, and determined the differences in microbial community composition under different environmental conditions. Adsorption was not the main SMX removal mechanism, as it only accounted for 5% of the total removal. The optimal SMX removal conditions were obtained for AGS when the COD, DO, and SMX concentrations were 600 mg/L, 8 mg/L, and 2,000 µg/L, respectively. The highest SMX removal efficiency was 93.53%. Variations in the three environmental factors promoted the diversity and changes of microbial communities in the AGS system. Flavobacterium , Thauera , and norank_f_Microscillaceae are key microorganisms in the AGS system. Thauera , and norank_f_Microscillaceae were sensitive to increases in SMX concentrations and beneficial for degrading high SMX concentrations. In particular, Flavobacterium abundances gradually decreased with increasing SMX concentrations.
ISSN:0923-9820
1572-9729
DOI:10.1007/s10532-021-09959-6