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• W3175268941 endingPage "962" @default.
• W3175268941 startingPage "953" @default.
• W3175268941 abstract "This study measured the effect of low activated sludge dissolved oxygen (DO) concentration on a membrane bioreactor (MBR) treating real urban wastewater with respect to organic matter and nitrogen removal efficiency and transmembrane pressure evolution. For this purpose, a full-scale experimental pre-denitrification MBR system was operated at a constant permeate flow rate of Q = 0.45 m3h−1 with intermittent aeration. The experimental installation worked at high hydraulic retention time, variable sludge retention time and with activated sludge temperatures of between 22.0 to 31.3 °C. Mean DO concentrations in the activated sludge were gradually decreased from 1.25 mgO2L−1 to less than 0.20 mgO2L−1. Variations in DO set points did not affect the main operational parameters of the MBR system and no clear relation was shown between DO concentration decrease and membrane fouling. At DO concentrations lower than 0.2 mgO2L−1, a deterioration in MBR effluent quality was observed, mainly with respect to chemical oxygen demand, biochemical oxygen demand at five days and NH4+, however, the opposite effect was observed for NO3-. These results indicate that employing low DO set points is a promising strategy for application in MBR systems." @default.
• W3175268941 created "2021-07-05" @default.
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• W3175268941 date "2021-06-30" @default.
• W3175268941 modified "2023-09-26" @default.
• W3175268941 title "Influence of activated sludge dissolved oxygen concentration on a membrane bioreactor performance with intermittent aeration" @default.
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• W3175268941 doi "https://doi.org/10.1080/10934529.2021.1944834" @default.
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• W3175268941 hasPublicationYear "2021" @default.
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