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- W2297319076 abstract "Iron, manganese and ammonia are common inorganic pollutants in groundwater. In the current study, a powdered activated carbon-amended membrane bioreactor (PAC-MBR) was designed for the treatment of groundwater (approximately Mn2 + 1.2 mg·L− 1, Fe2 + = 15.0 mg·L− 1 and NH4+-N = 2.2 mg·L− 1). Two lab-scale PAC-MBR systems were implemented to operate for 220 d to purify three influents that had different levels of pollutants, including raw water and the effluent of conventional bio-sand filters with different dissolved oxygen levels (i.e., 9 mg·L− 1 and 6 mg·L− 1) before filtration. The results showed that an excellent MBR effluent (iron < 0.2 mg·L− 1, manganese < 0.1 mg·L− 1 and ammonia < 0.05 mg·L− 1) was obtained irrespective of the amount of pollutants, but the start-up period varied (20–49 d). With respect to the trans-membrane pressure (TMP) evolution, system I (PVDF) exhibited good performance with a slight TMP increase from 7.0 to 17.0 kPa, whereas system II (PVC) exhibited a sharp rise from 20.0 to 60.0 kPa. In brief, a cake layer containing PAC and oxides was the main reason for membrane fouling. High-throughput sequencing analysis revealed that Mn-oxidizing bacteria (MnOB) (i.e., Leptothrix, Pseudomonas, Hyphomicrobium and Planctomyces) and ammonia-oxidizing bacteria (AOB) (i.e., Nitrospira, Nitrosomonas) played major roles in the PAC-MBR systems." @default.
- W2297319076 created "2016-06-24" @default.
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- W2297319076 date "2017-02-01" @default.
- W2297319076 modified "2023-10-14" @default.
- W2297319076 title "Removal of iron, manganese and ammonia from groundwater using a PAC-MBR system: The anti-pollution ability, microbial population and membrane fouling" @default.
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- W2297319076 doi "https://doi.org/10.1016/j.desal.2016.03.002" @default.
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