In-line coagulation to reduce high-pressure membrane fouling in an integrated membrane system: a case study

Zevenhuizen, Emily; Reed, Victoria; Rahman, M. Safiur; Gagnon, Graham A.

doi:10.1080/19443994.2014.958106

Cited by 7 publications

(1 citation statement)

References 28 publications

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“…Today, however, most large-scale membrane systems are operated in dead-end-mode due to the lower energy demand [13]. When using PAC/UF (or PAC/MF) in advanced wastewater treatment, inline coagulation is also often used to reduce organic fouling of the membranes [14]. According to the flow direction of the feed water in the capillaries, one can distinguish between OUT/IN processes and IN/OUT processes with a separation layer on the outer or inner surface of the hollow fibers, respectively.…”

Section: Introductionmentioning

confidence: 99%

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

Hoffmann

Rathinam

Martschin

et al. 2021

Water

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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.

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Section: Introductionmentioning

confidence: 99%