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Article

Influence of Carbon Agglomerate Formation on Micropollutants Removal in Combined PAC-Membrane Filtration Processes for Advanced Wastewater Treatment

1
Chair for Mechanical Process Engineering/Water Technology, University of Duisburg-Essen, 47057 Duisburg, Germany
2
Department for Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, 21000 Novi Sad, Serbia
3
IWW Water Centre, 45476 Mülheim an der Ruhr, Germany
4
DGMT German Society for Membrane Technology e.V., 45141 Essen, Germany
5
Centre for Water and Environmental Research (ZWU), 45141 Essen, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Arjun K. Venkatesan
Water 2021, 13(24), 3578; https://doi.org/10.3390/w13243578
Received: 23 October 2021 / Revised: 6 December 2021 / Accepted: 10 December 2021 / Published: 14 December 2021
(This article belongs to the Special Issue Advanced Technologies for Water Reclamation and Reuse)
Micropollutants (MPs) are ubiquitous in wastewater and are not effectively removed by the existing conventional treatment processes, resulting in increased environmental pollution. Nowadays, dosing of powdered activated carbon (PAC) prior to membrane filtration has emerged as an advanced wastewater treatment method for MPs removal. This study investigated the carbon agglomerate formation in the PAC stock suspension and its influence on MPs removal in PAC-capillary membrane filtration processes at both lab- and pilot-scale levels. Both lab- and pilot-scale membrane filtration results revealed that MPs removal efficiency is affected with the increase of PAC concentration in the stock suspension. For example, one of the investigated pilot tests showed a significantly reduced removal of good adsorbable MPs (from 57 to 17%) when stock suspension concentration was increased from 0.2 to 20 g/L. It is assumed that PAC agglomerates led to a slower adsorption kinetic and an inhomogeneous distribution of PAC in the membrane system. Maintaining PAC concentration in the stock suspension as low as possible (below 0.2 g/L for investigated PAC) certainly would help to avoid agglomeration problems and enhance the overall performance of the processes. View Full-Text
Keywords: ultrafiltration; activated carbon; adsorption; micropollutants; advanced wastewater treatment ultrafiltration; activated carbon; adsorption; micropollutants; advanced wastewater treatment
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MDPI and ACS Style

Hoffmann, G.; Rathinam, K.; Martschin, M.; Ivančev-Tumbas, I.; Panglisch, S. Influence of Carbon Agglomerate Formation on Micropollutants Removal in Combined PAC-Membrane Filtration Processes for Advanced Wastewater Treatment. Water 2021, 13, 3578. https://doi.org/10.3390/w13243578

AMA Style

Hoffmann G, Rathinam K, Martschin M, Ivančev-Tumbas I, Panglisch S. Influence of Carbon Agglomerate Formation on Micropollutants Removal in Combined PAC-Membrane Filtration Processes for Advanced Wastewater Treatment. Water. 2021; 13(24):3578. https://doi.org/10.3390/w13243578

Chicago/Turabian Style

Hoffmann, Grit, Karthik Rathinam, Matthias Martschin, Ivana Ivančev-Tumbas, and Stefan Panglisch. 2021. "Influence of Carbon Agglomerate Formation on Micropollutants Removal in Combined PAC-Membrane Filtration Processes for Advanced Wastewater Treatment" Water 13, no. 24: 3578. https://doi.org/10.3390/w13243578

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