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- W2024557687 abstract "Biooxidation of ferrous iron (Fe2+) from strongly acidic industrial wastewater with a high Fe2+ content by Thiobacillus ferrooxidans in a packed bed reactor and subsequent removal of ferric iron (Fe3+) by a crossflow microfiltration (membrane) process have been investigated as functions of wastewater flowrate (54–672 cm3 h−1), Fe2+ concentration (1.01–8.06 g dm−3), and pH (1.5–5.0). A natural (vegetable) sponge, Luffa cylindrica, was used as support matrix material. The fastest kinetic performance achieved was about 40 g Fe2+ dm−3 h−1 at a true dilution rate of 19 h−1 corresponding to a hydraulic retention time of 3.16 min. Steady state conversion was observed to be about 10% higher at pH 2.3 than that at pH 1.5. Increasing the flowrate of the inlet wastewater caused a reduction in conversion rate. The oxidation rate reduced along the reactor height as the wastewater moved towards the exit at the top but conversion showed the opposite trend. Increasing Fe2+ concentration up to a critical point resulted in an increased oxidation rate but beyond the critical point caused the oxidation rate to decrease. Luffa cylindrica displayed suitable characteristics for use as a support matrix for formation of a Thiobacillus ferrooxidans biofilm and showed promising potential as an ecological and sustainable alternative to existing synthetic support materials. Membrane separation was shown to be a very effective means of Fe3+ removal from the wastewater with removal changing from 92% at pH 2.3 to complete removal at pH 5.0. Copyright © 2003 Society of Chemical Industry" @default.
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- W2024557687 date "2003-01-01" @default.
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- W2024557687 title "Process intensification in wastewater treatment: ferrous iron removal by a sustainable membrane bioreactor system" @default.
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- W2024557687 doi "https://doi.org/10.1002/jctb.855" @default.
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