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- W3185142023 abstract "Fe3O4 nanoparticles (NPs) have potential effects on the anaerobic digestion of excess sludge. The effects of different concentrations of Fe3O4 NPs (0, 100, 200, 400 and 600 mg/L) on enzymes and microorganisms in anaerobic digestion were studied to explore the mechanism of the effect of Fe3O4 NPs on anaerobic digestion. The results showed that 100, 200 and 400 mg/L Fe3O4 NPs could promote anaerobic digestion, and 200 mg/L Fe3O4 NPs had the most obvious promoting effect. The activities of protease, cellulase, dehydrogenase, acetic kinase and coenzyme F420 in the 200 mg/L Fe3O4 NPs group reached 120 U/mg VS, 71.75 U/g VS, 135 U/mL, 94 mol/L, 1.37 umol/g VSS, respectively, which were 3.8, 1.5, 1.2, 1.2 and 1.6 times of the blank group, respectively. However, when the concentration of Fe3O4 NPs reached 600 mg/L, the activities of cellulase, dehydrogenase and acetic kinase were lower than those of the blank group, and anaerobic digestion was inhibited. The above conclusions can also be confirmed by high-throughput sequencing. The abundance of longilinea and ornatilina in the 200 mg/L Fe3O4 NPs group was 8.8% and 4.1% respectively, and methanthrix abundance was 69%, which was more conducive to decomposition acetic acid into CH4.Highlights To explore the effects of Fe3O4 NPS on enzyme activity and microorganisms.200mg/L Fe3O4 NPs could significantly promote the activity of enzyme.200mg/L Fe3O4 NPs could promote the diversity of bacterial and archaeal communities.600mg/L Fe3O4 NPs could inhibit some enzyme activities and microbial community diversity." @default.
- W3185142023 created "2021-08-02" @default.
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- W3185142023 date "2021-08-09" @default.
- W3185142023 modified "2023-10-09" @default.
- W3185142023 title "Effects of Fe<sub>3</sub>O<sub>4</sub> nanoparticles on anaerobic digestion enzymes and microbial community of sludge" @default.
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- W3185142023 doi "https://doi.org/10.1080/09593330.2021.1963324" @default.
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