Abstract：
:This study investigated sulfamethoxazole (SMX) removal and fate in sulfate-reducing up-flow sludge bed (SRUSB) reactors inoculated with sulfate-reducing bacteria (SRB) granules and flocs. The resilience of SRB granules and flocs against varying pHs and hydraulic retention times (HRTs) was also examined. SRB granules and flocs efficiently removed SMX from wastewater, which was significantly higher than the aerobic sludge. SRB granules achieved significantly (p < 0.05) higher SMX removal (∼13.3 μg/g suspended solids (SS)-d) than the SRB flocs (∼11.2 μg/g SS-d) during 150-day of SRUSB reactors operation. The SMX removal by both granules and flocs was mainly attributed to biodegradation. Sorption also contributed to SMX removal, in which aromatic protein-like substances of extracellular polymeric substances played important role in SMX removal. In addition, SRB granules showed higher resilience than SRB flocs against varying pHs and HRTs. Thus, SRB-mediated biological process, especially SRB granules, could be a promising biotechnology to remove SMX from wastewaters.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Qiu LQ,Zhang L,Tang K,Chen G,Kumar Khanal S,Lu Hdoi
10.1016/j.biortech.2019.121592subject
Has Abstractpub_date
2019-09-01 00:00:00pages
121592eissn
0960-8524issn
1873-2976pii
S0960-8524(19)30822-3journal_volume
288pub_type
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