RT Journal Article
T1 Impact of dissolved sulfide on a hybrid membrane bioreactor treating the effluent of a mainstream up-flow anaerobic sludge blanket
A1 Allegue Martínez, Tomás Francisco
A1 Arias Baño, Adrián
A1 Liñares Lamas, Alberto
A1 Omil Prieto, Francisco
A1 Garrido Fernández, Juan Manuel
AB Despite being toxic to some microbes in wastewater treatment, sulfide can also promote nitrogen removal through sulfide-oxidizing bacteria. This study evaluates the dissolved sulfide impact on a hybrid MBR treating the effluent of a mainstream UASB. A UASB-MBR (176 L) was fed with synthetic domestic sewage and operated for 154 days. Two periods were distinguished, one without (Period I) and one with (Period II) sulfide dissolved in the UASB effluent. Dissolved methane, COD, nitrogen, and organic micropollutants (OMP)s removals accomplished in the MBR during both periods were compared. Initially, sulfide inhibited methane removal, but once fully oxidized into sulfate in the anoxic compartment, the efficiencies recovered to similar levels as without sulfide (>70%). Sulfide additions significantly enhanced the MBR denitrification potential through sulfide-oxidizing bacteria, with improved removals in Period II (63.4 TN Lfeed−1) compared to Period I (40 mg TN Lfeed−1). Most of the nitrogen removal occurred in the anoxic compartment of the MBR, however, up to 21% of the nitrogen was denitrified in the aerobic compartment within the biofilm carriers. Aerobic methane oxidation coupled with denitrification, heterotrophic denitrifiers, sulfide oxidation, and anammox processes were involved in the nitrogen removal. COD and OMPs removals were not affected by sulfide
PB Royal Society of Chemistry
SN 2053-1400
YR 2023
FD 2023-08-30
LK http://hdl.handle.net/10347/31216
UL http://hdl.handle.net/10347/31216
LA eng
NO Environ. Sci.: Water Res. Technol., 2023, 9, 2733-2744
NO This research was supported by the Ministry of Science, Innovation and Universities of Spain through the Antares project (PID2019-110346RB-C21). Tomás Allegue extends his appreciation to the Ministry of Economy and Competitiveness (Spain) for granting him a research scholarship (BES-2014-069114). The authors are part of the Galician Competitive Research Groups (GRC) ED431C-2021/37
DS Minerva
RD 25 abr 2026