| Literature DB >> 25801795 |
George Skouteris1, Devendra Saroj2, Paraschos Melidis3, Faisal I Hai4, Sabèha Ouki2.
Abstract
This review concentrates on the effect of activated carbon (AC) addition to membrane bioreactors (MBRs) treating wastewaters. Use of AC-assisted MBRs combines adsorption, biodegradation and membrane filtration. This can lead to advanced removal of recalcitrant pollutants and mitigation of membrane fouling. The relative contribution of adsorption and biodegradation to overall removal achieved by an AC-assisted MBR process can vary, and "biological AC" may not fully develop due to competition of target pollutants with bulk organics in wastewater. Thus periodic replenishment of spent AC is necessary. Sludge retention time (SRT) governs the frequency of spent AC withdrawal and addition of fresh AC, and is an important parameter that significantly influences the performance of AC-assisted MBRs. Of utmost importance is AC dosage because AC overdose may aggravate membrane fouling, increase sludge viscosity, impair mass transfer and reduce sludge dewaterability.Entities:
Keywords: Granular activated carbon; Membrane bioreactors; Membrane fouling; Powdered activated carbon; Wastewater treatment
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Year: 2015 PMID： 25801795 DOI： 10.1016/j.biortech.2015.03.010
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642