Day/night temperature differences (DNTD) trigger changes in nutrient removal and functional bacteria in membrane bioreactors

Zhang, Shaoqing; Sheng, Binbin; Lin, Wenting; Meng, Fangang

doi:10.1016/j.scitotenv.2018.04.373

Cited by 12 publications

(1 citation statement)

References 59 publications

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“…The loss of biomass from the system occurred as a result of tank overflow caused by bulking phenomena. This problem present in the laboratory plant is continued in the operation of wastewater treatment plants, not only in membrane bioreactor technology, but also in other configurations [ 33 , 34 , 35 , 36 , 37 , 38 ]. In Phase 2, the decrease in the MLSS concentration was due to pharmaceutical intrusion, where the system was not able to absorb the effect on the MLSS.…”

Section: Resultsmentioning

confidence: 99%

Impacts of Organic Emerging Contaminants (Erythromycin, Ibuprofen, and Diclofenac) on the Performance of a Membrane Bioreactor Treating Urban Wastewater: A Heterotrophic Kinetic Investigation

et al. 2023

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The occurrence of emerging organic contaminants, such as pharmaceuticals, is a growing global concern. In this research, for a membrane bioreactor (MBR) laboratory plant operating at a hydraulic retention time (HRT) of 24 h, fed with real urban wastewater, the heterotrophic biomass behaviour was analysed for two concentrations of erythromycin, ibuprofen, and diclofenac. The concentrations studied for the first phase were erythromycin 0.576 mg L−1, ibuprofen 0.056 mg L−1, and diclofenac 0.948 mg L−1. For Phase 2, the concentrations were increased to erythromycin 1.440 mg L−1, ibuprofen 0.140 mg L−1, and diclofenac 2.370 mg L−1. Heterotrophic biomass was affected and inhibited by the presence of pharmaceutical compounds in both phases. The system response to low concentrations of pharmaceutical compounds occurred in the initial phase of plant doping. Under these operating conditions, there was a gradual decrease in the concentration of mixed liquor suspended solids and the removal of chemical oxygen demand of the system, as it was not able to absorb the effect produced by the pharmaceutical compounds added in both phases.

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