Virtual elimination of MF and UF fouling by adsorptive pre-coat filtration

Malczewska, Beata; Liu, J.; Benjamin, Mark M.

doi:10.1016/j.memsci.2015.01.032

Cited by 28 publications

(27 citation statements)

References 18 publications

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“…Presented results confirm existing reports that passage of feed through a thin layer of pre-coated HAOPs removes NOM and membrane foulants and substantially removes the majority of the UV254 from the raw water KIM et al 2007;2010;LIU 2016;MALCZEWSKA 2016;MALCZEWSKA, BENJAMIN 2016;MALCZEWSKA et al 2015].…”

Section: Resultssupporting

confidence: 89%

“…One of the newest approaches is raw water pretreatment by micron-sized heated aluminium oxide particles (HAOPs) prior to membrane filtration, so called micro-granular adsorptive filtration (µGAF). The process integrates granular media filtration and packed bed adsorption KIM et al 2007;2010;LIU 2015;MALCZEWSKA 2016;MAL-CZEWSKA, BENJAMIN 2016;MALCZEWSKA et al 2015]. The aim of this paper was to estimate the fouling parameters using the experimental data for microgranular adsorptive filtration.…”

Section: Introductionmentioning

confidence: 99%

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Investigations of the mechanism of the fouling in microgranular adsorptive filtration

Malczewska¹

2017

Journal of Water and Land Development

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The application of microgranular adsorptive filtration (μGAF) has been successfully used in conjunction with membrane filtration. It proves to be efficient not only in removal of natural organic matter (NOM) but also it significantly reduces the extent of fouling. There are a few mathematical models evaluated to understand the underlying mechanism of fouling. This paper describes a method of predicting filtration capacities using constant flow datasets collected when μGAF was applied. The results suggest that the behaviour of fouling in microgranular adsorptive filtration system varies between different filtration operations and natural water quality. In analysed case the mechanism of pores blocking can be described by the complete blocking mechanism.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Investigations of the mechanism of the fouling in microgranular adsorptive filtration

Malczewska¹

2017

Journal of Water and Land Development

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“…Others suggest that the use of heated aluminum oxide particles (HAOPs) in conjunction with the water treatment on the UF or MF membranes is an effective method of removing NOM CHANG, KIM et al 2007;MALCZEWSKA et al 2015;2016]. This paper compares the effectiveness of NOM removal by HAOPs when pre-coated onto the membrane surface prior to membrane filtration.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of effectiveness of natural organic compounds removal from water in hybrid processes

Malczewska¹

2016

Journal of Water and Land Development

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Natural organic matter (Natural Organic Matter -NOM) represents a mixture of diverse chemical structure and different properties. The humic substances constitute an important component of NOM, and they are responsible for water color and taste, also they can contribute to the formation of disinfection by-products (DBP). Therefore, removal of NOM is considered to be one of the important technological operations during water treatment.The present study evaluate the effectiveness of NOM removal from water by one of the hybrid process and the results showed that the use of this process allows to improve the efficiency of water purification and also reduces the intensity of blocking membranes. Batch adsorption tests of heated aluminum oxide particles (HAOPs) showed that the NOM removal efficiency has been between 86 to 77% at a dose 5 and 10 mg·dm -3 , respectively for both tested natural water.

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“…Prior work by our group has demonstrated that passing natural water through a thin ( $ 200-μm) layer of micron-sized heated aluminum oxide particles (HAOPs) ('microgranular adsorptive filtration' [μGAF]) promotes NOM removal and dramatically mitigates fouling [30][31][32][33][34][35]. In one of these studies [30], water samples that had been pretreated by μGAF or by exposure to an ion exchange resin had virtually identical HPSEC-UV 254 spectra, but dramatically different tendencies to foul a membrane, demonstrating that fouling could not be attributed to an identifiable group of UV-absorbing molecules.…”

Section: Introductionmentioning

confidence: 99%

HAOPs pretreatment to reduce membrane fouling: Foulant identification, removal, and interactions

Wang

Benjamin

2016

Journal of Membrane Science

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a b s t r a c tFouling of an ultrafiltration membrane by raw lake water, the same water after passage through a layer of heated aluminum oxide particles (HAOPs), and the fractionated natural organic matter (NOM) (based on hydrophobicity) of each of those waters was investigated. When each fraction of the raw water was fed to the membrane at the same DOC concentration, the hydrophobic (HPO) fraction was the least well retained by the membrane, but it caused the most fouling, whereas the hydrophilic (HPI) fraction was the most efficiently retained fraction and caused the least fouling. Furthermore, whenever the feed contained mixtures of different fractions, fouling was worse than would be predicted by a simple mixing model, indicating that interactions among the fractions are important factors in the fouling process.Treatment of the raw water by HAOPs substantially removed fulvics from all five feed solutions (raw water, the HPO, TPI [transphilic], and HPI fractions, and the reconstituted water) and humics from all except the HPI fraction (which contained very little humic material in the first place). In contrast, HAOPs treatment removed aromatic proteins only from the HPI fraction. HAOPs also selectively removed higher-MW NOM. The treatment significantly mitigated membrane fouling by all the fractions to a greater extent than would be expected based on DOC removal.The fouling of membranes fed either raw water or HAOPs-pretreated water was largely reversed by alkaline cleaning. The NOM that was released by the cleaning step was enriched in aromatic proteins and non-fluorescent fractions, but it contained much less humic and fulvic matter and overall fluorescence than raw water. The results suggest that a non-fluorescent HPO fraction of the NOM accumulated on the membrane and is responsible for substantial fouling, and that interactions among different fractions are important contributors to fouling.

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Virtual elimination of MF and UF fouling by adsorptive pre-coat filtration

Cited by 28 publications

References 18 publications

Investigations of the mechanism of the fouling in microgranular adsorptive filtration

Investigations of the mechanism of the fouling in microgranular adsorptive filtration

Evaluation of effectiveness of natural organic compounds removal from water in hybrid processes

HAOPs pretreatment to reduce membrane fouling: Foulant identification, removal, and interactions

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