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Functional resilience of activated sludge exposed to Bacillus globigii and bacteriophage MS2
Author(s) -
Smith Matthew,
Stuntz Sean,
Xing Yun,
Magnuson Matthew,
Phillips Rebecca,
Harper Willie F.
Publication year - 2021
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12682
Subject(s) - activated sludge , bacteriophage ms2 , chemistry , bacteriophage , food science , resilience (materials science) , ethanol , environmental chemistry , environmental engineering , biochemistry , environmental science , sewage treatment , materials science , escherichia coli , composite material , gene
This study evaluated the effect of two biocontaminant surrogates on the activity and performance of activated sludge. In the presence of bacteriophage MS2 at 3.2 × 10 8 PFU/ml, the peak respiration rates varied between 9.1 and 10.5 mg O 2 /gVSS/hr, generally similar to the rates observed in negative controls. MS2 did not alter the molar CO 2 ‐produced‐to‐O 2 consumed stoichiometry observed during respiration. Similar results were observed for Bacillus globigii (BG). Ethanol, a potential co‐contaminant associated with biocontamination incidents, can inhibit initial oxygen uptake. MS2 and BG both adsorbed to activated sludge; post‐exposure viability was confirmed for BG but not for MS2. This study is the first to evaluate the effects of BG and MS2 on activated sludge, and it presents a protocol that can be used in operational situations.