期刊
MEMBRANES
卷 12, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/membranes12030293
关键词
urban wastewater; forward osmosis (FO); organic matter concentration; Contaminants of Emerging Concern (CECs); ecological risk quotient
类别
资金
- Regional Government of Castilla y Leon
- EU-FEDER [INFRARED-2018-UVA3, CLU 2017-09, VA088G19, UIC 071, UIC 082]
- Ministerio de Ciencia e Innovacion [PID2019-109403RB-C21/AEI/10.13039/501100011033]
- University of Valladolid (UVa) - Regional Government of Castilla y Leon
- Ministry of Science and Innovation [PID2019-109403RB-C21/AEI/10.13039/501100011033]
Forward osmosis is a promising technology for the treatment of urban wastewater, which can efficiently eliminate pollutants and produce water without ecotoxicological risk.
Forward osmosis (FO) is a promising technology for the treatment of urban wastewater. FO can produce high-quality effluents and preconcentrate urban wastewater for subsequent anaerobic treatment. This membrane technology makes it possible to eliminate the pollutants present in urban wastewater, which can cause adverse effects in the ecosystem even at low concentrations. In this study, a 0.6 m(2) hollow fiber aquaporin forward osmosis membrane was used for the treatment of urban wastewater from the Valladolid wastewater treatment plant (WWTP). A total of 51 Contaminants of Emerging Concern (CECs) were investigated, of which 18 were found in the target urban wastewater. They were quantified, and their ecotoxicological risk impact was evaluated. Different salts with different concentrations were tested as draw solutions to evaluate the membrane performances when working with pretreated urban wastewater. NaCl was found to be the most appropriate salt since it leads to higher permeate fluxes and lower reverse saline fluxes. The membrane can eliminate or significantly reduce the pollutants present in the studied urban wastewater, producing water without ecotoxicological risk or essentially free of pollutants. In all cases, good recovery was achieved, which increased with molecular weight, although chemical and electrostatic interactions also played a role.
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