Influence of cosubstrate and hydraulic retention time on the removal of drugs and hygiene products in sanitary sewage in an anaerobic Expanded Granular Sludge Bed reactor.

Autor: Granatto CF; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Ave Trabalhador São-Carlense, No. 400, Zipcode 13566-590, São Carlos, SP, Brazil. Electronic address: carol_granatto@usp.br., Grosseli GM; Federal University of São Carlos, Washington LuizHighway, Km 235, Zipcode 13565-905, São Carlos, SP, Brazil. Electronic address: grosseli@ufscar.br., Sakamoto IK; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Ave Trabalhador São-Carlense, No. 400, Zipcode 13566-590, São Carlos, SP, Brazil. Electronic address: sakamoto@sc.usp.br., Fadini PS; Federal University of São Carlos, Washington LuizHighway, Km 235, Zipcode 13565-905, São Carlos, SP, Brazil. Electronic address: psfadini@ufscar.br., Varesche MBA; Department of Hydraulics and Sanitation, São Carlos School of Engineering, University of São Paulo, Ave Trabalhador São-Carlense, No. 400, Zipcode 13566-590, São Carlos, SP, Brazil. Electronic address: varesche@sc.usp.br.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2021 Dec 01; Vol. 299, pp. 113532. Date of Electronic Publication: 2021 Sep 23.
DOI: 10.1016/j.jenvman.2021.113532
Abstrakt: Diclofenac (DCF), ibuprofen (IBU), propranolol (PRO), triclosan (TCS) and linear alkylbenzene sulfonate (LAS) can be recalcitrant in Wastewater Treatment Plants (WWTP). The removal of these compounds was investigated in scale-up (69 L) Expanded Granular Sludge Bed (EGSB) reactor, fed with sanitary sewage from the São Carlos-SP (Brazil) WWTP and 200 mg L -1 of ethanol. The EGSB was operated in three phases: (I) hydraulic retention time (HRT) of 36±4 h; (II) HRT of 20±2 h and (III) HRT of 20±2 h with ethanol. Phases I and II showed no significant difference in the removal of LAS (63 ± 11-65 ± 12 %), DCF (37 ± 18-35 ± 11 %), IBU (43 ± 18-44 ± 16 %) and PRO (46 ± 25-51 ± 23 %) for 13±2-15 ± 2 mg L -1 , 106 ± 32-462 ± 294 μg L -1 , 166 ± 55-462 ± 213 μg L -1 and 201 ± 113-250 ± 141 μg L -1 influent, respectively. Higher TCS removal was obtained in phase I (72 ± 17 % for 127 ± 120 μg L -1 influent) when compared to phase II (51 ± 13 % for 135 ± 119 μg L -1 influent). This was due to its greater adsorption (40 %) in the initial phase. Phase III had higher removal of DCF (42 ± 10 % for 107 ± 26 μg L -1 influent), IBU (50 ± 15 % for 164 ± 47 μg L -1 influent) and TCS (85 ± 15 % for 185 ± 148 μg L -1 influent) and lower removal of LAS (35 ± 14 % for 12 ± 3 mg L -1 influent) and PRO (-142 ± 177 % for 188 ± 88 μg L -1 influent). Bacteria similar to Syntrophobacter, Smithella, Macellibacteroides, Syntrophus, Blvii28_wastewater-sludge_group and Bacteroides were identified in phase I with relative abundance of 3.1 %-4.7 %. Syntrophobacter was more abundant (15.4 %) in phase II, while in phase III, it was Smithella (12.7 %) and Caldisericum (15.1 %). Regarding the Archaea Domain, Methanosaeta was more abundant in phases I (84 %) and II (67 %), while in phase III it was Methanobacterium (86 %).
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Databáze: MEDLINE
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