As Mat Ballard recalled: The first steps up to 1.2 litre and then 2.0 litre were successful, but were as far as we could go in the lab. Prof Bursill approached ICI, and convinced them to restart work with CSIRO on magnetic resins, this time targeted at DOC removal. A second batch of pre-mix was made under close supervision, and used in production batches D6 and D7 – which also set solid, though not as badly. While extremely successful, conventional ion exchange suffers from three problems: The problems with conventional ion exchange led to the idea of using a magnetic ion exchange resin in a stirred tank, and recovering the resin through its high density and/or magnetism. The first MIEX® pilot plant was a 200 kilolitre unit at Hope Valley. Placement of MIEX® Resin Technology in the Treatment Train The MIEX® resin technology was tested using raw water as the first step in the overall water treatment process. MIEX® Treatment Systems have small footprints, very low waste volumes and are not subject to chromatographic peaking, allowing ion exchange to be used in a wide variety of applications and throughputs. SE treatment by the hybrid process of MIEX followed by ozonation was evaluated based on the removal of BOIs, OMPs, bio-toxicity and fluorescence, and more information on the inherent correlations between spectrographic indicators, OMPs, and bio-toxicity under the MIEX desorption process was provided. Before using MIEX, it was rinsed with DI water three times of the volume of the resin. MIEX® process as a pre-treatment removed a majority of small molecular weight organic matter (500–1000 Da). CSIRO: Mat Ballard, Don Weiss, Heng Taing, Mike Falkiner, Stuart Littler, Neil Furlong, Darrell Wells, George Georgakalis, Mike Wedding, Nick Booker, Steve Gray, Jim Bates, Rob Eldridge, David Adam, Ngoc Le, Steve Vickers, Tracy Appleby, ORICA: Hung Nguyen, Onn Chin, Matt Kirk, Russell Mills, Marin Sljunsky, Veronica Pearce, Stuart Harrison, Phil Ritchie, Ishmael. A full-scale (110 ML/d) potable water treatment plant (WTP) based on the MIEX process, an innovative new process based on a strong base anion-exchange resin with magnetic properties, has been operating in Perth Western Australia since 2001. DOC can have a major impact on treated water quality and the treatment process, including: reacting with disinfectants to form harmful disinfection by-products (DBPs), influencing the appearance and water color, taste and odor, an ion exchange process used in drinking water treatment. Instead, he focused on creating a resin that had adequate performance at reasonable cost. The MIEX® advanced process, systems and resins were developed over an extended period stretching back to the mid 1980s. The first two processes are integral to the main water treatment plant, while the resin regeneration is conducted in a … The 99.9% recovery figure is based on the resin mass leaving the MIEX process in the treated water stream. The treated water was collected for PFAS analysis to evaluate the adsorption efficiency of the pristine resin. It can be used in a stirred tank, followed by settling, or (more recently) as a fluidised bed. Unfortunately, both surface and bore water in Australia often have high levels of DOC. The influence of MIEX® resin dose and membrane cut-off on natural organic matter removal (NOM) efficiency was analyzed. Further investigations showed that the wrong iron oxide had been used. MIEX® process reduces dissolved organic oxygen in groundwater Outbreaks of Dimethyl Trisulphide in the Wanneroo water distribution system in Western Australia resulted in the construction of the world's first large-scale MIEXRegistered water treatment plant. (DOC) and improving the quality of potable water. The advantages of magnetic ion exchange are: Magnetic ion exchange has a long history. The removal of chloride on MIEX resin is an ion-exchange mechanism. These process advantages will be achieved at the Wanneroo groundwater treatment plant by constructing the MIEX plant at the head of the treatment stream. He then had the insight that a resin like the ICI/CSIRO SIROTHERM® might be able to do the job because it did not require the use of packed columns. MIEX® Background. 0000002786 00000 n 0000001531 00000 n It is a continuous ion exchange process performed in tanks, which is maintained in a steady state by the withdrawal and regeneration of loaded resin, and the return of this resin to the process. The objective of this article is to analyze characteristics and application of MIEX Resin in engineering projects, and hence provide critical review on merits and demerits of the resin. Mat Ballard, who had just joined CSIRO from ICI, was selected to lead the research program. MIEX® resin technology is ideally suited . DOC itself is harmless, but it can interfere in these treatment processes. The MIEX® Treatment Process is an advanced ion exchange process that uses MIEX® Resin to remove target contaminants from water and wastewater streams. Surprisingly, they asked CSIRO if they could make the required resin – about 20 batches – on the 200 litre scale! For instance, MICo® SOF is an advanced fluidized bed ion exchange treatment process that can achieve softening, DOC and bromide … The next step up was 200 litre: the first two batches were quite poor, with small particle size, and poor magnetic oxide incorporation. 0000001736 00000 n IX has been introduced by the WHO as a nitrate removal technology and approved as the Best Available Technology (BAT) for nitrate removal by US EPA. Customers familiar with the very low waste volumes produced by the MIEX® ion exchange process had suggested that if this advantage could also be applied to nitrate removal applications, it would offer a significant advantage over the alternative treatment options. The surface water became less humic after MIEX treatment, as demonstrated by the decrease in A/T ratio compared to the raw surface water, but then humic content increased with continuous resin use. The applied MIEX doses were 2, 4, 8, and 15 mL/L. Afterwards supernatant was decanted into a stirred magnetically cell for the subsequent UF treatment. The MIEX® Treatment Process The MIEX® Treatment Process is an advanced ion exchange process that uses MIEX® Resin to remove target contaminants from water and wastewater streams. When made at small scale, it remained cool, but when made at commercial scale, it became quite hot. MIEX resin and its process were developed by the Australian company and research organizations Orica, Commonwealth Scientific Industrial Research Organization, and South Aus-tralianWaterCorporation.ThepatentsonMIEXresinandthe MIEX process were issued in 2001 and 2003, respectively [13††, 14††]. In the high reactor, raw water is fed to the base of the reactor vessel and is mixed with the MIEX ® resin and the ion exchange process occurs in a uniformly mixed fluidized bed. 0000002169 00000 n [Source: CSIRO]. The 99.9% recovery figure is based on the resin mass leaving the MIEX process in the treated water stream. MIEX®DOC process revealed to be more efficient in DOC removal than conventional treatment achieving the efficiencies in the range of 61-91 %, lowering disinfection by-products formation potential of the water. In the fluidized bed the magnetic particles are attracted to each other to form large agglomerates that form a stable resin suspension at hydraulic loading rates of up to 20 m/hr. 0000073035 00000 n The MIEX® treatment process is a patented process developed by Orica Watercare, Inc (Orica). The MIEX process uses a specially developed magnetised ionic resin to attract the negatively charged dissolved organic carbon (DOC) compounds that can cause colouration in untreated water. It was one thing to make 60 g of resin in a 200 ml reactor in the lab, and quite another to make enough to supply a water treatment plant – even a small one of several megalitres per day. to treat the highly coloured Cape waters of South Africa. Subsequently, the exhausted MIEX was regenerated with a 10% w/w NaCl solution. For the MIEX-UF hybrid process, briefly, appropriate dose of MIEX resin was added to feed water and mixed for 30 min followed by 30 min of settling. Mergen M, Jarvis P, Jefferson B & Parsons DJ (2006) Impact of continuous MIEX use on downstream water treatment processes. Dissolved organic carbon organic carbon Subject Category: Miscellaneous see more details can be removed effectively as well as chlorite and chlorate using MIEX resin in real water. an ion exchange process used in drinking water treatment. DOC removal efficiency at Lever WTP depends largely on the raw water quality and ranges from 28 % for water of moderated quality to 89 % of significantly deteriorated quality. 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