Filtration Plant Research Articles

Is monochloramine pre-oxidation a viable strategy for enhancing the treatment efficiency of algae-laden water with conventional drinking water treatment process?

Algal blooms worldwide pose many challenges to drinking water production. Pre-oxidation with NaClO, KMnO4, or ozone is commonly used to enhance algal removal in conventional drinking water treatment processes. However, these currently utilized oxidation methods often result in significant algal cell lysis or impede the operation of the subsequent units. Higher algal removal with pre-chlorination in algal solutions prepared with natural water, compared to those prepared with ultrapure water, has been observed. In the present studies, preliminary findings indicate that ammonium in natural water alters chlorine species to NH2Cl, leading to improved treatment efficiency. NH2Cl with 1.5–3.0 mg∙L−1 as Cl2 with an oxidation time of 3–7 h significantly enhancing algal removal by coagulation. The selective oxidation of surface-absorbed organic matter (S-AOM) by NH2Cl, followed by the subsequent peeling off of this material from the algal surface, leading to an increase in zeta potential from −20.2 mV to −3.8 mV, constitutes the primary mechanism of enhanced algal removal through coagulation. These peeled S-AOM retained their large molecular weight and acted as polymer aids. Compared with NaClO and KMnO4, NH2Cl displays the best performance in improving algal removal, avoiding cell lysis, and decreasing the potential for nitrogenous disinfection byproducts formation under the reaction conditions used in this study. Notably, in major Chinese cities, water purification plants commonly rely on suburban lakes or reservoirs as water sources, necessitating the transportation of raw water over long distances for times up to several hours. These conditions favor the implementation of NH2Cl pre-oxidation. The collective results indicate the potential of NH2Cl oxidation as a viable pretreatment strategy for algal contamination during water treatment processes.

Non-uniform heat source or sink on the radiated and thermophoretic flow of slender body of paraboloid and cone revolutions in a saturated medium with Brownian motion

Heat and mass transfer acquired the attention of investigators and experts because of massive uses in the field of medicine, manufacturing of modern aircrafts, uses in advanced water filtration plants, distillation process of water, more efficient electronic instruments, more efficient batteries, textile industry, uses as manufacturer in cosmetics industry and modern defense equipment. By viewing this, we considered the numerical study of Fourier flux and buoyancy driven forces on the flow of thermal and diffusion transmission of body revolutions (Paraboloid and cone), situated in a water-logged Darcy medium by allowing the radiation, Brownian motion, time-space dependent heat source or sink, and thermopheretic. Later on, the governing system is solved via Runge–Kutta method. Properties of convoluted governing measures of the organisms on local Nusselt and Sherwood numbers along with velocity, thermal and diffusion shapes are described with the aid of graphically and tabular form. It is stimulating to declare that the non-uniform heat source or sink is highly dominated in cone form of revolution as associated to paraboloid form of flow due to more distribution of mass transfer. From this, one can draw the conclusion that wherever there are higher mass transportation phenomena, cone-shaped body of revolution can be used. It is found that the time- and space-dependent heat source or sink performs as a regulating factor of the transmission of flow phenomena.

Exploring the microscopic eyeball of cyanobacteria: A comprehensive review

Cyanobacteria resemble algae in that they contain chlorophyll and then photosynthesize and oxygen is released as a result. Cyanobacteria resemble bacteria in that they are Gram-negative bacteria and their wall consists of peptidoglycan and contain a primitive nucleus and do not contain chloroplasts but membranes called thylakoids that contain the chlorophyll pigment for photosynthesis. Cyanobacteria produce their own energy through photosynthesis, just like plants. Scientists from America said that they made an "energy generator" using a bottle containing bacteria and sewage, and that the efficiency of these "microbes connected to wires" reached 30%, which is equivalent to the efficiency of the best solar cells currently commercially available. The researchers explained in their study, the results of which were published in the Proceedings of the American Academy of Sciences, that it is still necessary to find a suitable metal to manufacture an important part of this small "generator", which is a cathode, which is the electrode of the electrical circuit where the process of reducing electrons occurs, as an alternative to the silver oxide that they currently use. The idea of using bacteria as a source of energy generation is not new, and through this idea, bacteria that live on natural waste can be exploited and release excess electrons through a complex mechanism of cells during this process that leads to the conversion of chemical energy into an electric current. It is expected that water purification plants will be the place for these microbial generators, as public wastewater is rich in natural materials, in addition to the fact that not only will electricity be produced there, but the water will be purified at the same time, which reduces the operating costs of these stations. However.

Early warning system in drinking water purification plants for modelling both residual turbidity and aluminium

Early warning system in drinking water purification plants for modelling both residual turbidity and aluminium

Research on an eco-safe filtration plant for wastewater treatment made of natural raw materials

Purpose. To develop a new eco-safe filtration plant for wastewater treatment based on natural and secondary raw materials, which will allow rational use of natural resources with further mathematical modeling of hydrodynamics of mixing treated wastewater in bioponds to predict removal of residual concentrations from the filter. Methodology. A complex of modern methods of theoretical and experimental research was used to solve the tasks. Concentration of pollutants was determined using methods of atomic adsorption spectroscopy, titrimetry and gravimetric methods, as well as pyrometric analysis. A laboratory installation was created, which included a receiving tank, a filter column, and a tank for collecting purified wastewater. Prediction of distribution and mixing of treated effluent in bioponds was carried out using mathematical and computer software. Findings. An environmentally safe filtration plant (containing sand, fallen leaves of linden, poplar, and plastic residues separated by a polymer mesh) was created to purify wastewater from suspended substances and nitrates. Kinetics of changes in concentration of suspended solids and nitrates in urban wastewater were studied. When using the filtration plant, concentration of suspended solids decreased by 85–92 %. Concentration of nitrates in purified water processed with such a plant is reduced from 12 to 0.25–0.05 mg/dm3. A mathematical model concerning distribution of purified water in a biopond was obtained, which allows predicting possible migration distributions of residual concentrations in purified water during its natural movement downstream. Originality. For the first time, influence of the species origin of fallen leaves on the performance indicators of wastewater filtration plant of urban sewage treatment constructions was investigated, which made it possible to substantiate a new way of disposal of this type of waste. For the first time, it was established that wastewater treatment using an eco-safe filtration plant based on natural and secondary raw materials, containing layers of sand, fallen oak, linden, and poplar leaves, gives an opportunity to reduce contents of suspended solids in wastewater by 1.5 times of the maximum permissible concentration; and such treatment also reduces concentration of nitrates by 4 times from the initial level. Pollutants from wastewater are mechanically fixed in pockets (microcracks, cracks) of fallen leaves, formed during drying of leaves, which is explained by hardening of intercellular spaces with formation of a specific geometry of holes. For the first time, mathematical modeling of purified wastewater movement in a biological pond with a complex geometry was performed, which allows estimating the concentration of the pollutant at its outlet from the pond. Practical value. The created environmentally safe wastewater filtration plant gives an opportunity to perform not only filtering, but also an effective biological purification of wastewater from nitrates on the surface of layers of fallen leaves. The wide use of the proposed installation will allow attracting plastic of polyethylene bottles used in everyday life as a secondary raw material. Based on the proposed mathematical model of movement of purified liquid containing residual concentrations of pollutants, it is possible to carry out qualitative forecasting and optimization of the process of cascade wastewater treatment at industrial and economic enterprises.

Odour management in drinking water systems fed by mixed water supplies

Algae-derived odour events in water supplies have been increasing with eutrophication and climate change. It is important to engage in proactive management of odourants to retain consumer confidence in the safety of their drinking water. In this study, historical monitoring data were analysed to provide a holistic understanding of source-to-tap odour risks at a large drinking water filtration plant, supplied via pipeline and open canal from reservoirs in protected catchments, as well as a supplementary reservoir located adjacent to the water filtration plant. The occurrence of odourant chemicals, odour descriptors and potential odour-producing algae were analysed during periods of variable supply from the supplementary reservoir. Fishy odour was more likely to occur in mixed raw water during periods of high supply from the supplementary reservoir. High cell densities of potential odour-producing algae, including the Cyclotella, Cryptomonas, Dinobryon and Synedra and Asterionella genera, were detected in the supplementary reservoir. Interestingly, more odour complaints were received from consumers when the supplementary reservoir was offline or in limited use, and they were primarily described as ‘earthy/musty’ and ‘chemical’ odours, or as a general ‘bad smell’. This research identified the need for improved monitoring of odourants in source and raw water as well as the development of publicly available resources for odour identification.

A Comprehensive Study on Cyber Attacks in Communication Networks in Water Purification and Distribution Plants: Challenges, Vulnerabilities, and Future Prospects.

In recent years, the Internet of Things (IoT) has had a big impact on both industry and academia. Its profound impact is particularly felt in the industrial sector, where the Industrial Internet of Things (IIoT), also known as Industry 4.0, is revolutionizing manufacturing and production through the fusion of cutting-edge technologies and network-embedded sensing devices. The IIoT revolutionizes several industries, including crucial ones such as oil and gas, water purification and distribution, energy, and chemicals, by integrating information technology (IT) with industrial control and automation systems. Water, a vital resource for life, is a symbol of the advancement of technology, yet knowledge of potential cyberattacks and their catastrophic effects on water treatment facilities is still insufficient. Even seemingly insignificant errors can have serious consequences, such as aberrant pH values or fluctuations in the concentration of hydrochloric acid (HCI) in water, which can result in fatalities or serious diseases. The water purification and distribution industry has been the target of numerous hostile cyber security attacks, some of which have been identified, revealed, and documented in this paper. Our goal is to understand the range of security threats that are present in this industry. Through the lens of IIoT, the survey provides a technical investigation that covers attack models, actual cases of cyber intrusions in the water sector, a range of security difficulties encountered, and preventative security solutions. We also explore upcoming perspectives, illuminating the predicted advancements and orientations in this dynamic subject. For industrial practitioners and aspiring scholars alike, our work is a useful, enlightening, and current resource. We want to promote a thorough grasp of the cybersecurity landscape in the water industry by combining key insights and igniting group efforts toward a safe and dependable digital future.

Generation of green electricity from sludge using photo-stimulated bacterial consortium as a sustainable technology

Microbial fuel cell (MFC) is a bio-electrical energy generator that uses respiring microbes to transform organic matter present in sludge into electrical energy. The primary goal of this work was to introduce a new approach to the green electricity generation technology. In this context a total of 6 bacterial isolates were recovered from sludge samples collected from El-Sheikh Zayed water purification plant, Egypt, and screened for their electrogenic potential. The most promising isolates were identified according to 16S rRNA sequencing as Escherichia coli and Enterobacter cloacae, promising results were achieved on using them in consortium at optimized values of pH (7.5), temperature (30°C) and substrate (glucose/pyruvate 1%). Low level red laser (λ = 632.8nm, 8mW) was utilized to promote the electrogenic efficiency of the bacterial consortium, maximum growth was attained at 210 sec exposure interval. In an application of adding standard inoculum (107 cfu/mL) of the photo-stimulated bacterial consortium to sludge based MFC a significant increase in the output potential difference values were recorded, the electricity generation was maintained by regular supply of external substrate. These results demonstrate the future development of the dual role of MFCs in renewable energy production and sludge recycling.

Increasing Performance of Spiral-Wound Modules (SWMs) by Improving Stability against Axial Pressure Drop and Utilising Pulsed Flow.

Spacer-induced flow shadows and limited mechanical stability due to module construction and geometry are the main obstacles to improving the filtration performance and cleanability of microfiltration spiral-wound membranes (SWMs), applied to milk protein fractionation in this study. The goal of this study was first to improve filtration performance and cleanability by utilising pulsed flow in a modified pilot-scale filtration plant. The second goal was to enhance membrane stability against module deformation by flow-induced friction in the axial direction ("membrane telescoping"). This was accomplished by stabilising membrane layers, including spacers, at the membrane inlet by glue connections. Pulsed flow characteristics similar to those reported in previous lab-scale studies could be achieved by establishing an on/off bypass around the membrane module, thus enabling a high-frequency flow variation. Pulsed flow significantly increased filtration performance (target protein mass flow into the permeate increased by 26%) and cleaning success (protein removal increased by 28%). Furthermore, adding feed-side glue connections increased the mechanical membrane stability in terms of allowed volume throughput by ≥100% compared to unmodified modules, thus allowing operation with higher axial pressure drops, flow velocities and pulsation amplitudes.

Pesticides, Heavy Metals and Plasticizers: Contamination and Risk Assessment of Drinking-Water Quality

This study highlights the impact of formal agricultural practices and their adverse effect on the deterioration of underground water quality, with special emphasis on toxic elements, including pesticides, herbicides, fungicides, plasticizer accumulation and heavy-metal contamination. A comprehensive study was conducted at various recently developed societies of Sadiqabad that were formerly used for agricultural purposes. Ten various societies were selected, and three samples from each society were collected from different regions of these areas. Data regarding the physicochemical properties, metal contamination and accumulation of pesticide residues were determined using standard protocols. The results revealed that almost all the physicochemical properties of water samples selected from these sites were close to the WHO’s recommended limits. The range for physicochemical properties was pH (6.4–7.7), electrical conductivity (168–766 µ S cm−1), turbidity (6–17 NTU), total hardness (218–1030 mg L−1), chloride contents (130–870 mg L−1) and phosphate contents (2.55–5.11 mg L−1). Among heavy metals, lead and arsenic concentrations in all sampling sites were found to be above the recommended limits. The decreasing pattern in terms of water-quality deterioration with respect to physicochemical properties was FFT > USM > CRH > UCS > CHS > MAH > FFC > CGA > GIH > AGS. Overall, 95 different kinds of toxic elements, including pesticides, herbicides, plasticizer, etc., were detected in the groundwater samples. The toxic compounds in the groundwater were categorized into pesticides, herbicides, plasticizer, plant growth regulators, fungicides, acaricides and insecticides. Most of these parameters showed peak values at the Fatima Fertilizer Company area and Chief Residencia Housing Society. Pesticide contamination showed that water-filtration plants have a big positive impact on the drinking quality of water. Proper monitoring of the pesticides must be performed, as the majority of the pesticides showed low priority. The monitoring method of the pesticides needs to be updated so that the occurrence of recently authorized pesticides is demonstrated.

Bioconvection aspects in magnetized Eyring-Powell fluid configured by suspension of ferromagnetic nanoparticles subject to gyrotactic moment of microorganisms

Nanotechnology took the interest of researchers and scientists because of vast applications in field of medicine, elimination of cancerous cells, robots based on nano technology, manufacturing of modern aircrafts, distillation process of water, more efficient electronic instruments, more efficient batteries, used in advance water filtration plants, textile industry, used as manufacturer in cosmetics industry, magnetic data storage systems, modern defense equipment’s and biomedical engineering. While keeping in mind the role of nanotechnology, we have chosen the fluid model with basic purpose to compute the efficiency of radiative phenomena in magnetized Eyring Powell nanofluid configuration with impervious surface. The basic purpose of introducing microorganism’s notion is to make fluid more stable with suspension of nano sized particles by process of bioconvection under magnetic effects too. Research in field of bioconvection is considered valuable as well as appealing in biotechnology and bioengineering; most recently numerous bio-convective problems are solved for growth as well as promotion of microorganisms. Important properties of thermophoresis diffusion along with Brownian motion parameter that belongs to particular model, while considering the impacts of thermal gradients, motile microorganisms as well as convective boundary conditions. Here, system contains on coupled PDEs is altered in form of ODEs, after that we resolve resultant ODEs by use of famous numerical technique commonly known as bvp4c method. Results of different important physical factors are to be expressed by means of graphs. It is also found the temperature of fluid shows increasing behavior for thermal radiation along with thermophoresis but decay for increasing Prandtl number. With increase in Peclet number we observed that the strength for motile microbes reduces.

Iron and aluminum based beaded sorbents for removing arsenic and fluorine from water: Application of machine learning for material selection

In this study, the waste reuse of water purification plant sludge (WPS) and coal mine drainage sludge (CMDS) was carried out and synthesized into beaded adsorbents BWPS and BCMDS. The WPS is rich in aluminum, and the aluminum-based adsorbent has a good adsorption effect on the fluoride in water. CMDS is rich in iron and calcium, arsenic can be removed from water using this device. The experiments mainly probed the pollutant-removing effects of two beaded adsorbents on fluoride and arsenic in water. According to the Langmuir isotherm equation, the maximum adsorption capacities (Qmax) of F- on BWPS and BCMDS are 0.90 and 0.65 mg g−1, and the Qmax of As (V) are 9.87 and 14.88 mg g−1, respectively. With a range of pH 4 ∼ 10 in experiments, increasing pH decreased the pseudo-second-order rate (K2) of F- and As(V) adsorbed on the beaded adsorbents. The mechanism for removing F- by BWPS is physical adsorption, on BCMDS are ion exchange and precipitation, and for As(V) are physisorption and precipitation. In the desorption experiments, the results indicated that both adsorbents can be reused. In addition, it is combined with XGBoost and SHapley Additive exPlanations (SHAP), to predict the adsorption capacity. Data preprocessing and model training improved the prediction accuracy, resulting in a final RMSE of 0.429 and an average prediction accuracy of 91%. Through the evaluation index (EI) select the final adsorbent, the results showed that the choice of adsorbent was unchanged in general conditions and expert surveys, however, in some specific scenarios can be changed.

서울과 타이베이의 상수도 정수장의 유산화 과정과 박물관으로의 활용을 통해 본 근대 상수도의 의미

서울과 타이베이의 상수도 정수장의 유산화 과정과 박물관으로의 활용을 통해 본 근대 상수도의 의미

Energy Production Using Microbial Fuel Cell from Sludge Produced from Potable Water Treatment

A microbial fuel cell (MFC) is a type of device which is an electrochemical, after technology that is being to recover electricity from wastewater. This study's objective was to measure the potential difference from sludge collected from El-Sheikh Zayed water purification plant (Egypt in April 2021), isolate and identify bacteria present in sludge: Also, determine the effect of adding some metabolites on such physical and chemical properties. Potential difference measurement showed (192 mV) by using MFC. Pantoea spp., Aeromonas salmonicida, Comamonas testosteroni and Staphylococcus lentus were isolated and identified by biochemical reaction tests. A. salmonicida gave the highest potential difference (13mV). After adding some metabolites separately (albumen, dextrose, gelatin and casein), casein recorded 196Mv, a mixture was done between A. salmonicida and four metabolites measuring 50 mV. Physical and chemical analysis showed that biochemical oxygen demand (BOD) (55.0 P.P.M.), chemical oxygen demand (COD) (112.0 P.P.M.), and many minerals and heavy metals were also detected. Green synthesis of electricity from electrogenic bacteria using wastewater like sludge is a promising way to generate electricity by a cheap method.

Using Electrical Methods to Increase Sedimentation Rate of Sludge in Drinking Water of Purification Stations during the Rainy Season

This study deals with increasing the rate of clay settlement in the sedimentation basins of drinking water purification plants, especially in heavy rain periods in 2017, by using an electric current. The electric current leads to the disposal of the charges on the surface of the suspended clay particles, which leads to their flocculation and increases the sedimentation rate in a shorter time. The results showed rapid sedimentation in a time not exceeding 25 minutes, as an electric cell consisting of two copper electrodes was placed in a container containing turbid river water with a turbidity of more than (1000) NTU. Several tests were conducted on Tigris River water samples in the Department of Physics / university of Mosul to control the current, voltage, and time. Changing one of the variables shows that the best conditions for the deposition of clays are when an electric current is applied at an intensity of 0.15 amperes and a voltage of 20 volts in a time of 20 minutes, the turbidity decreased to 2 NTU. Since the water that will be treated is drinking water, the copper electrodes have been replaced by carbon electrodes, as carbon is an inert element and it is safe to use with water. It was noted that the clays were deposited at a time close to when using copper electrodes.

Protein valorisation from acid whey – Screening of various micro- and ultrafiltration membranes concerning the filtration performance

Cross-flow filtration allows a product-preserving and energy-saving unit operation for the production of whey protein concentrates (WPC) from acid whey. In micro- and ultrafiltration applications, size-exclusion is the governing separation mechanism. Flux and retention characteristics of 12 organic membranes of pore sizes between 5 and 450 nm were compared. Screening on a laboratory filtration plant revealed large differences regarding hydraulic resistance of the membrane and resistance of the deposit layer that forms on the membrane surface during filtration. As a result, notable variations in the permeate flux were observed between membranes. In contrast, the differences in protein retention were less pronounced. The protein transmission for all ultrafiltration membranes was below 5% whereas microfiltration membranes showed a deposit layer-dependent transmission behaviour. Compared with the conventional WPC35 production, the overall filtration efficiency with regard to the process duration for a comparable membrane area was 3-fold enhanced by a more appropriate membrane selection.

Evaluation of the Performance of the Makhmuor Villages Water Filtration Plant in Nineveh Governorate / Iraq

The current study was conducted to evaluate the performance of the Makhmuor villages water filtration plant and to ensure the validity of the water produced and delivered to the consumer. The physical, chemical and biological properties of the Tigris River water at the intake of the plant and at different stages of the plant and the water reaching the residential areas benefiting from the plant were studied. The studied samples were collected for a period of five months, monthly from July to November 2022. Temperature, electrical conductivity, total dissolved solids, turbidity, dissolved oxygen, biological oxygen demand, total alkalinity, total hardness, calcium, magnesium, chloride, sulfates, phosphates, nitrates, pH, residual chlorine, and the total number of bacteria. And the total number of coli bacteria and the number of plankton. The results of the study showed that many samples conformed to the Iraqi and international specifications for drinking water, except for turbidity, as it exceeded the permissible limit in most samples, which is less than 5 (Nephelometric Turbidity Unit) NTU, and dissolved oxygen reached 4.4 and 4.8 mg / liter in the Tigris River for the month of August and water Liquefaction in the villages for the months of July and September, respectively, as well as 4.4 mg/L in the automated sedimentation and filtration ponds and the village 2 for the month of November. The biological requirement for oxygen in seven samples in different locations for the months of October, August and November was 0.1 mg/L and the highest value was 6.4 mg/L in basin 2 in October. And nitrates were in low concentrations. As for residual chlorine, all tests were free of any percentage of it, except for the month of November, when it was in the plant tank 2 mg / liter and in the two villages 0.3 mg / liter. Thus, the number of bacteria increased and appeared in all samples throughout the study period.

Sustainable, decentralized water treatment system fabricated from domestic waste materials and ultrafast-reduced graphene oxide

The demand for fresh water will increase in the coming decades as the world population grows. While large-scale water purification plants will serve highly populated areas, the demand of fresh water will continue to grow even in remote and potentially under-developed locations. In this work, it has been shown that fresh water can be produced from seawater or polluted water using waste paper and direct solar exposure, without the need of electricity during water purification. The highly efficient solar evaporation system proposed here, which is based on graphene/cellulose aerogels, can be fabricated quickly without highly technical skills, requiring only a microwave oven, graphene oxide samples, and cellulose fibers obtained from packaging (i.e., waste paper and polyethylene foams). The produced aerogels show high photo-thermal conversion, excellent hydrophilicity and low thermal conductivity, properties that are conducive to evaporation rates as high as 1.83 kg m−2 h−1, photo-thermal efficiency of 92%, and stability for more than 40 operation cycles. Despite using waste materials, these performance metrics are superior to those reported for most materials to date, and are a consequence of the manufacturing process described here. Field tests confirmed that 1 m2 of the as-prepared aerogels can produce between 6.44 and 11.27 kg of fresh water from seawater or polluted water in a 12-hour period, which is the daily amount of drinking water required for three adults based on World Health Organization projections.

Development of water quality prediction model for water treatment plant using artificial intelligence algorithms

Accurate prediction of water quality changes in the water treatment process is an important factor for optimal decision-making process such as the design, operation, and diagnosis of water treatment facilities. This study developed an Artificial Intelligence (AI) algorithm model predicting dissolved organic carbon (DOC) removal and disinfection byproducts formation, and comparatively analyzed existing empirical models and prediction results to examine the applicability of AI algorithm techniques to water quality prediction in the water treatment process. We enhanced empirical models for predicting DOC removal and disinfection byproduct formation in Korea water purification plant. Six AI algorithm techniques were applied and tested using real-world data. All AI algorithm models outperformed the original empirical models in predicting DOC removal and byproduct formation. In terms of the DOC prediction model, multi-layer perceptron (MLP) showed the optimal performance (R2 = 0.9795; root mean square error [RMSE] = 0.0365 mg/L). MLP also showed the optimal performance in disinfection byproduct formation prediction (R2 = 0.9781; RMSE = 0.0008 mg/L. As a result, the prediction performance of AI algorithm models improved with larger sample sizes. By securing data samples for approximately 1 year, these models were confirmed to outperform empirical models.

Reverse osmosis pretreatment by a fluidized magnetic ion exchange resin for application in a power plant: Pilot-scale and high-rate operations and foulant characterization

Biofouling is one of the most serious problems in reverse osmosis (RO) operations. Here, we operated a pilot-scale MIEX® system with a high-rate configuration as a pretreatment for an RO system in a water purification plant. The goal was to investigate the RO foulants obtained with and without pretreatment by MIEX®. The MIEX® resin (10 to 300 mL/L) removed dissolved organic matter (DOM) within 5 min. A pilot-scale fluidized reactor with 100 mL/L of MIEX® removed 35.6%, 49.4%, and 56.2% of dissolved organic carbon (DOC) for effective resin doses of 0.03, 0.06, and 0.12 mL/L, respectively. Unknown screening analysis by Orbitrap mass spectrometry revealed that the MIEX® pretreatment decreased or removed 165–363 DOM features with carbon, hydrogen, and oxygen (CHO features) and 145–220 CHO features with N heteroatoms (CHON features) with effective resin doses of 0.03–0.12 mL/L. Moreover, fluorescence EEM revealed the preferential removal of terrestrial DOM, resulting in over half of the protein-like substances remaining in the RO feed. MIEX® selectively removed highly oxygenated DOM features within a short contact time, while condensed aromatic structures and lignin-like compounds were removed after 30 min. Increasing the MIEX® dose resulted in the additional removal of DOM features with less oxygenated characters and longer alkyl chains. The RO system with and without MIEX® pretreatment was similarly fouled by protein-like substances and CHON features; however, the MIEX® pretreatment decreased CHO features and terrestrial DOM foulants. The MIEX® pretreatment decreased organic and irreversible fouling and doubled the RO system lifetime, resulting in lower chemical cleaning and pressure requirements for an identical permeate volume.