Long term case study of MIEX pre-treatment in drinking water; understanding NOM removal

Drikas, Mary; Dixon, Mike B.; Morran, Jim

doi:10.1016/j.watres.2010.11.024

Cited by 125 publications

(50 citation statements)

References 38 publications

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“…David et al (2004) show that the use of MIEX® was able to increase the removal of DOC level in raw water whilst reducing coagulant dosage during coagulation process. Similar result was observed by Drikas et al (2011) where large amount of DOC was removed during MIEX pre-treatment prior to coagulation process. Thus, the amount of coagulant required during coagulation process also decrease.…”

Section: Magnetic Ion Exchange Resin Treatment (Miex®)supporting

confidence: 84%

“…Thus, the amount of coagulant required during coagulation process also decrease. Drikas et al (2011) also mentioned that MIEX treatment is not dependent on the DOC concentration in raw water since a consistent removal was obtained during 2 year of study regardless of DOC concentration.…”

Section: Magnetic Ion Exchange Resin Treatment (Miex®)mentioning

confidence: 92%

“…MIEX® is a strong base anion with ammonia functional group (Mergen et al, 2008) and a macroporous polyacrylic matrix in chloride form (Boyer and Singer, 2006). This treatment utilized a strong base-anion exchange resin by incorporating magnetic iron oxide particles into the resin matrix and applied to raw water in continuous-flow reactors (Drikas et al, 2011). David et al (2004) show that the use of MIEX® was able to increase the removal of DOC level in raw water whilst reducing coagulant dosage during coagulation process.…”

Section: Magnetic Ion Exchange Resin Treatment (Miex®)mentioning

confidence: 99%

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Trends on Natural Organic Matter in Drinking Water Sources and its Treatment

Ibrahim¹,

Aziz²

2014

IJSRES

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Abstract. Natural organic matter (NOM) can be defined as a mixture of complex organic compounds that universally present in natural waters. High NOM content in water strongly impact the water quality and treatment in several ways (e.g. causing colour and odour, filter fouling and increase coagulant dose). Besides that, NOM also acts as the main precursor to disinfectant by products (DBPs) produce from the reaction of NOM and disinfectant during water treatment. DBPs are known to be carcinogenic to human and animals. The formation of DBPs is depending on NOM characteristics. Generally, NOM characteristics are differ according to the water sources. In order to understand NOM properties, NOM fractionation is required and therefore different approaches have been proposed for its characterization. Meanwhile several methods of treatment have been developed to remove or reduce the amount of NOM in drinking water sources to prevent DBPs formation. The aim of this paper is to review and discuss the properties and available treatment techniques for NOM.

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Section: Magnetic Ion Exchange Resin Treatment (Miex®)supporting

confidence: 84%

Section: Magnetic Ion Exchange Resin Treatment (Miex®)mentioning

confidence: 92%

Section: Magnetic Ion Exchange Resin Treatment (Miex®)mentioning

confidence: 99%

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Trends on Natural Organic Matter in Drinking Water Sources and its Treatment

Ibrahim¹,

Aziz²

2014

IJSRES

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“…Researchers have also developed alternative testing procedures, such as multiple-loading jar tests and fluidized bed column tests, to investigate other process configurations for MIEX resin. MIEX tests have been conducted using drinking water sources from all over the world, e.g., Australia, China, Japan, Poland, Turkey, UK, and USA [6,8,9,[23][24][25]. Most data for MIEX resin is from NaCl regeneration with limited data from NaHCO 3 regeneration [18,21,[26][27][28].…”

Section: Dom Removal From Drinking Waters Sourcesmentioning

confidence: 99%

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Boyer

2015

Curr Pollution Rep

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This article provides a state-of-the-art review on the uses of magnetic ion exchange (MIEX) resin in drinking water and wastewater treatment, with emphasis on removal of dissolved organic matter (DOM) from drinking water and wastewater, regeneration efficiency, removal of inorganic and synthetic organic chemicals, comparison with other anion exchange resins, and integration with other physical-chemical processes. Through laboratory jar tests, pilot plant tests, and full-scale installations for a variety of drinking water sources, MIEX resin can achieve 30-80 % removal of dissolved organic carbon (DOC), which is often higher than alum or ferric coagulation. In addition, MIEX resin has been shown to remove hydrophilic, transphilic, and hydrophobic fractions of DOM and a wide range of molecular weight fractions of DOM. As a result, MIEX pretreatment results in substantial reductions in the formation of trihalomethanes and haloacetic acids upon chlorination. MIEX resin can achieve bromide removal in the range of 10-50 %, with higher bromide removal in waters with low DOC, low alkalinity, and low sulfate. However, there are commercially available anion exchange resins that are more selective for bromide than MIEX resin. MIEX resin has been investigated in combination with coagulation, activated carbon adsorption, membrane separation, lime softening, and ozonation. MIEX pretreatment has been shown to reduce downstream chemical requirements and improve the operation of downstream processes. This is most evident for coagulation and ozonation where the coagulant dose can be reduced by 50-75 % and the ozone concentration can be increased by 40-65 %. In general, MIEX pretreatment shows minor reductions in membrane fouling. Future research should continue to investigate the integration of MIEX treatment with other processes.

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“…However, the pollution of the majority of water sources has become a subject of significant concern. Conventional methods for water treatment that involve removing the colloidal and suspended solids from raw water have a good level of efficiency (1)(2)(3)(4)(5). However, there are increasing concerns about the presence of organic compounds in water because these compounds provide an important resource for the formation of trihalomethanes (THMs) and mutagenic substances and they can also act as a source of carbon for microorganisms.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Efficiency of the Conventional Water Treatment Processes Employed to Eliminate TOC in Jalaliyeh Water Treatment Plant, Tehran

et al. 2017

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Background: The organic compounds that are present in water facilitate the formation of Trihalomethanes (THMs) and mutagenic substances and consequently undermine the suitability of drinking water. Objectives: This work aimed to investigate the extent to which total organic carbons (TOCs) are efficiently removed in the Jalaliyeh water treatment plant. Methods: Water samples, which included raw water, the effluent after the accelerator process, and the effluent after the filtration process, were taken from the Jalaliyeh water treatment plant over the course of six months. Three samples of each type were taken on two specific days of each week, equating to 24 samples in each month and 144 samples in total. TOC measurements were taken using a spectrophotometer at a wavelength of 555 nm. Results: When the input TOC was at its maximum value, TOC removal efficiency was around 80%. This could potentially be increased by augmenting the amount of coagulant substance or through the use of coagulant aid. The removal efficiency reduced as the concentration of TOC input reduced. Conclusions: The accelerator eliminated TOC with an acceptable level of efficiency. The samples taken after rainy days contained higher organic matter content, especially TOC, than on the days following no rainfall.

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Long term case study of MIEX pre-treatment in drinking water; understanding NOM removal

Cited by 125 publications

References 38 publications

Trends on Natural Organic Matter in Drinking Water Sources and its Treatment

Trends on Natural Organic Matter in Drinking Water Sources and its Treatment

Removal of Dissolved Organic Matter by Magnetic Ion Exchange Resin

Investigation of the Efficiency of the Conventional Water Treatment Processes Employed to Eliminate TOC in Jalaliyeh Water Treatment Plant, Tehran

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