Hybrid UASB-MBBR-RBBR designed for organic matter and nitrogen removal.
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Organic matter removal > 99% and a total nitrogen removal of 89% achieved.
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Major problem of sludge washout in UASB could be eliminated by the use of media.
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Maximum biogas production of 0.61 m3/kg CODremoved achieved.
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Moving rope bed with oxic and anoxic microenvironments favoured nitrogen removal.
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