Water Purification Effect Research Articles

Study on Water Purification Effect and Operation Parameters of Various Units of Wastewater Circulation

The discharge of wastewater from aquaculture ponds causes a certain degree of damage to the environment. It is necessary to continuously improve the treatment efficiency of wastewater treatment devices. The purpose of this study is to obtain an optimal ratio of wastewater circulation devices in order to obtain the best operating parameters and to reduce the discharge of polluted water. We constructed an experimental wastewater circulation device consisting of three units. The primary unit contained modified attapulgite (Al@TCAP-N), volcanic stone, and activated carbon for precipitation. The secondary and tertiary units used biological methods to enhance removal rates of nitrogen and phosphorus. Water quality indicators of total phosphorus (TP), total nitrogen (TN), ammonia (NH3-N), permanganate (CODMn), and total suspended solids (TSS) were detected. Water quality was tested under different matching ratios for three units of different hydraulic retention time (HRT) and load Results showed that the removal rate of TP, TN, NH3-N, and TSS reached 20–60%, 20%, 30–70%, and 10–80%, respectively. The average reduction efficiencies of secondary module chlorella and filler on TP, TN, NH3-N, CODMn, and TSS were 56.88%, 30.09%, 0.43%, 46.15%, and 53.70%, respectively. The best removal rate can be achieved when the matching ratio of each unit becomes 2:1:1 and the hydraulic retention time is maintained within 2 h in the high-concentration load. Finally, the average removal rates of TP, TN, NH3-N, and TSS reached 58.87%, 15.96%, 33.99%, and 28.89%, respectively. The second unit obtained the enhanced removal effect in this wastewater treatment system when adding microorganisms and activated sludge.

INVESTIGATION OF PHENOL SORPTION REMOVAL PROCESS BY COMPOSITE SORBENT F300-MnO2

Phenolic compounds are widespread wastewater pollutants that are produced in the oil and petrochemical industry, coal conversion, and phenol production. Phenols are widely used for the commercial production of a wide variety of plastics, which are used as structural materials for automobiles and equipment, at production of epoxy resins and adhesives. The discharge of phenol-containing waters into water bodies and watercourses sharply worsens their general sanitary status, affecting living organisms not only by their toxicity but also by a significant change in the regime of biogenic elements and dissolved gases. Among the methods of phenols removal from wastewater, there is a wide variety of oxidation methods such as photochemical, aerobic biological, enzymatic, ozone, electrochemical oxidation. The paper is devoted to the investigation of the conditions of phenol removal using a composite sorbent with an active oxidation phase. The composite sorbent F300-MnO2 was obtained by deposition of manganese dioxide on the surface of pores of activated carbon Filtrasorb 300. The conditions of modification of activated carbon by the KMnO4 solution were studied to intensify the process of phenol removal from aqueous solutions. It was determined that the best effect of water purification is achieved when coal was treated by KMnO4 solution with concentration of 0.025 mol-eq/dm3 within 5‑15 minutes. The investigation of the effect of pH on phenol removal by composite sorbent and unmodified coal revealed the highest efficiency in a weak acidic environment: at pH 4-5 for F300-MnO2 and 5-6 for unmodified coal. The obtained isotherms of phenol sorption on F300 and F300-MnO2 showed that modification with the KMnO4 solution enhanced the sorption capacity of the coal. The effect of oxidative pollutant removal is more noticeable when carrying out the process for a relatively long time (several days or weeks). Otherwise, the limiting factors are reduced specific surface area of the sorbent due to its partial filling with MnO2 nanoparticles, and diffusion within the grains of the composite sorbent, which makes the extraction of phenol by unmodified coal becomes more efficient.

PAC-UF Process Improving Surface Water Treatment: PAC Effects and Membrane Fouling Mechanism.

In this study, the water purification effect and membrane fouling mechanism of two powdered activated carbons (L carbon and S carbon) enhancing Polyvinylidene Fluoride (PVDF) ultrafiltration (UF) membranes for surface water treatment were investigated. The results indicated that PAC could effectively enhance membrane filtration performance. With PAC addition, organic removal was greatly enhanced compared with direct UF filtration, especially for small molecules, i.e., the S-UF had an additional 25% removal ratio of micro-molecule organics than the direct UF. The S carbon with the larger particle size and lower specific surface area exhibited superior performance to control membrane fouling, with an operation duration of S-UF double than the direct UF. Therefore, the particle size and pore structure of carbon are the two key parameters that are essential during the PAC-UF process. After filtration, acid and alkaline cleaning of UF was conducted, and it was found that irreversible fouling contributed the most to total filtration resistance, while the unrecoverable irreversible resistance ratio with acid cleaning was greater than that with alkaline cleaning. With PAC, irreversible UF fouling could be relieved, and thus, the running time could be extended. In addition, the membrane foulant elution was analyzed, and it was found to be mainly composed of small and medium molecular organic substances, with 12% to 21% more polysaccharides than proteins. Finally, the hydrophilicity of the elution was examined, and it was observed that alkaline cleaning mainly eluted large, medium, and small molecules of hydrophilic and hydrophobic organic matter, while acid cleaning mainly eluted small molecules of hydrophilic organic matter.

Ecological floating bed for decontamination of eutrophic water bodies: Using alum sludge ceramsite

In this study, a combined ecological floating bed (C-EFB) with alum sludge ceramsite (ASC) was designed to improve the water purification effect of traditional ecological floating beds (T-EFBs). During the ASC preparation stage, alum sludge was shaped into a ball, air-dried, and fired under 600 °C. The physical and chemical properties of the ASC meet the requirements of Artificial Ceramsite Filter Materials for Water Treatment (CJ/T229-2008). This study investigated the increased capability of this new-type artificial substrate (ASC) on the removal of chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total phosphorus (TP), and total nitrogen (TN) from eutrophic landscape water. Compared with the T-EFB, the C-EFB owns a higher purification efficiency. The highest average efficiency of COD, NH4+-N, TN and TP removals during the four operating stages was 78.2%, 58.1%, 46.7% and 53.2%, respectively, in the C-EFB, which were all higher than those of 53.5%, 32.4%, 27.2% and 25.8%, respectively, for the T-EFB. Among them, the C-EFB showed a higher advantage in the removal of TP. The results showed that the potential benefits of utilizing ASC in seriously eutrophic bodies of water.

TECHNOLOGICAL SCHEMES FOR WATER PURIFICATION AND CONDITIONING OF NON-CENTRALIZED DRINKING WATER SUPPLY SYSTEMS

The article provides an analytical review of the achievements and publications on the development of water treatment devices for non-centralized drinking water supply systems. It contains the results of our own experimental research on the optimization of the technological regime of water purification from nitrates on ion-exchange resins for non-centralized local and individual drinking water supply systems. The study of the most effective anion exchangers was carried out using mathematical planning of experiments, the purpose of which was to study the influence of the main factors of the operation of the ion-exchange column on the efficiency of removing nitrates from groundwater. The obtained particular solutions of the experimental-statistical dependencies in the range of optimal values make it possible to assess the change in the effect of water purification from nitrates according to linear regression equations taking into account the variation in the filtration rate, the ratio of the height of the ion-exchange column and its diameter, and the temperature of the treated water. Technological schemes and devices have been developed for the purification and conditioning of underground waters of non-centralized individual drinking water supply systems using the ion exchange method to remove nitrates.

Characteristics of flat-sheet ceramic ultrafiltration membranes for lake water treatment: A pilot study

In order to explore the characteristics of ceramic membranes in the treatment of surface water with high turbidity and high content of organic matters, a pilot-scale test was carried out on the water treatment process composed of pre-zonation, coagulation, sedimentation, and ultrafiltration using flat-sheet ceramic membranes. The water purification effect of the combined process and the influences of different operating parameters on membrane fouling were comprehensively investigated. The results showed that the effluent turbidity of the combined process could be controlled below 0.1 NTU, and the removal rates of CODMn, DOC and UV254 in the raw water were 58%, 49%, and 45%, respectively. The membrane fouling rate largely depended on the permeate flux; when the constant permeate fluxes were set at 80, 100, 120 and 150 L m−2h−1, the rising rates of the transmembrane pressure (TMP) in the early stage were 0.18, 0.42, 1.20 and 2.04 kPa/h, respectively. The permeate production period had a relatively small effect on the membrane fouling rate, and the “high-intensity short-time” mode was demonstrated more efficient than the “low-intensity long-time” mode during backwashing. Under the optimized conditions, no chemical cleaning was required by the ceramic membranes during 12 days of continuous operation, with the TMP increasing by only 20 kPa. A series of characterizations suggested that the irreversible membrane fouling was mainly caused by proteins, humic substances and silicates. The chemical cleaning strategy with the combined use of NaClO and acid cleaning agents was recommended for the recovery of membrane performance.

Nitrogen and Phosphorus Pollutants Removal from Rice Field Drainage with Ecological Agriculture Ditch: A Field Case

Excessive nitrogen and phosphorus in agricultural drainage can cause a series of water environmental problems such as eutrophication of water bodies and non-point source pollution. By monitoring the water purification effect of a paddy ditch wetland in Gaochun, Nanjing, Jiangsu Province, we investigated the spatial and temporal distribution patterns of N and P pollutants in paddy drains during the whole reproductive period of rice. Then, the dynamic changes of nitrogen and phosphorus in time and space during the two processes of rainfall after basal fertilization and topdressing were analyzed after comparison. At last, the effect of the ditch wetland on nutrient purification and treatment mechanism, along with changing flow and concentration in paddy drains, was clarified. The results of this study showed that the concentrations of various nitrogen and phosphorus in the ditch basically reached the peak on the second and third days after the rainfall (5.98 mg/L for TN and 0.21 mg/L for TP), which provided a response time for effective control of nitrogen and phosphorus loss. The drainage can be purified by the ecological ditch, about 89.61%, 89.03%, 89.61%, 98.14%, and 79.05% of TN, NH4+-N, NO3−-N, NO2−-N, and TP decline. It is more effective than natural ditches for water purification with 80.59%, 40%, 12.07%, 91.06% and 18.42% removal rates, respectively. The results of the study can provide a theoretical basis for controlling agricultural non-point source pollution and improving the water environment of rivers and lakes scientifically.

Fabrication of New Porous Degradable Materials and Study on Purification Effect of Sewage

In order to improve the effect of biomass aerogels on water purification, this study which based on microcapsule and biomass aerogels explores new porous ecological filler. The research finding is that this porous ecological filler have significant removal efficiency on the concentration of TP, NH3-N, and COD. The removal effect on NH3-N is especially ideal. During the ten- days water purification effect test, we find that the maximum removal rate of TP, NH3-N, and COD reached 45 percent, 59 percent and 20 percent, providing scientific theoretical support on the preparation of biomass aerogels and the application of water purification.

Purification effect on runoff pollution of porous concrete with nano-TiO2 photocatalytic coating

With the rapid development of cities, more attention has been paid to the stormwater runoff pollution on roads. In this paper, a kind of photocatalytic water purification pavement coated with nano-TiO2 was developed, which could improve the water purification performance of porous concrete. Through removal rate analysis of three typical pollutants, the improvement of its water purification performance was evaluated. The skid resistance of road surface and durability of purification effect were also studied by using pendulum apparatus and artificial accelerated aging method. The results showed that the removal rates of COD, TP and NH3-N could reach 50%, 60% and 40%, respectively. The application of photocatalytic coating would reduce skid resistance of pavement relatively. Besides, appropriate increase of nano-TiO2 content will improve the weather resistance. This study will provide useful insights for the preparation of nano-TiO2 photocatalytic coatings for porous cement concrete to improve the water purification effect of roads.

Spatial priorities for biodiversity and ecosystem services considering theoretical decision-makers’ attitudes to risk

Choosing appropriate spatial priorities for protected areas (PAs) to conserve ecosystem services (ESs) and biodiversity is a challenge for decision makers under limited land resources, especially when facing uncertain protection consequences or conflicting protection objectives. Attitudes toward risk will influence actions, which will, in turn, impact consequences. To understand how theoretical decision-makers’ attitudes towards risk impact protection effectiveness for biodiversity and ESs (e.g., water retention, soil retention, flood mitigation, water purification and carbon sequestration) and how this information can be integrated into effective PAs management, we examined Hainan Island as a case study. We used the ordered weighted averaging (OWA) algorithm to assess the impact of attitude towards risk in PA management. Decision-makers’ attitude towards risk scenarios (from risk-averse and risk-taking) showed higher mean protection effectiveness (2.41–2.85) than existing PAs (2.37), indicating that there is still room for improvement in biodiversity and ESs conservation in existing PAs. In addition, among the seven examined risk scenarios, the higher risk aversion scenario showed the best outcome. In comparison to existing PAs, this scenario improved mean protection effectiveness (20.13%) as well as the protection effectiveness of water retention (24.84%), water purification (11.46%), flood mitigation (8.84%), soil retention (16.63%), carbon sequestration (5.31%), and biodiversity (12.84%). Thus, our research shows that the influence of theoretical decision-makers’ attitudes towards risk could be considered by OWA method which could provide a normative model of what the right choice given theoretical risk attitudes is while selecting priority area for biodiversity and ESs.

Construction of a Near-Natural Estuarine Wetland Evaluation Index System Based on Analytical Hierarchy Process and Its Application

Nutrients carried in upstream rivers to lakes are the main cause of eutrophication. Building near-natural estuarine wetlands between rivers and lakes is an effective way to remove pollutants and restore the ecology of estuarine areas. However, for the existing estuarine wetland ecological restoration projects, there is a lack of corresponding evaluation methods and index systems to make a comprehensive assessment of their restoration effects. By summarizing a large amount of literature and doing field research, an index system was constructed by combining the characteristics of the near-natural estuarine wetlands themselves. It covered environmental benefits, technical management and maintenance, and socio-economic functions, and contained 3 systems, 7 criteria, and 16 indicators. The analytical hierarchy process (AHP) was used to determine the weights of each indicator. The top 5 indicators in order of importance were habitat diversity, total phosphorus (TP), coverage of aquatic plants, ammonia nitrogen (NH3-N), and adaptation to the surrounding landscape. The above evaluation system was used for the comprehensive evaluation of the water purification project in the Fuhe estuarine wetland, Hebei Province, as an example. The results showed that the comprehensive score of the Fuhe estuarine wetland at this stage was 4.1492, and the evaluation grade was excellent. The effect of water purification and ecological restoration was good, and the selected technology was suitable and stable in operation. It had a greater positive impact on the surrounding economy and society and can be promoted and applied. The research results were important for clarifying the advantages and defects of the project and developing efficient and advanced restoration technologies.

Analysis of the Migration Characteristics of Stormwater Runoff Pollutants on Different Underlying Surfaces in Guangzhou, China

Stormwater runoff is identified as urban nonpoint source pollution that increasingly introduces contaminants to urban water bodies and impedes sustainable development. The pollution load of runoff varies due to the interception of different land cover types during the urban hydrological process. During the rainy season (June–August) in 2018, five different underlying surfaces (green roof, parking lot, urban road, parkway, and grassland) were selected in Guangzhou to analyze the migration characteristics of stormwater runoff pollutants. The concentrations of heavy metals, such as chromium (Cr), cadmium (Cd), lead (Pb), and mercury (Hg), as well as total nitrogen (TN), total phosphorus (TP), and polycyclic aromatic hydrocarbons (PAHs) were collected and analyzed on different underlying surfaces with the rainfall data at the beginning of a stormwater runoff event. The results showed that PAHs, heavy metals, and TP existed mainly in the form of particles; nitrogen was mainly present as ammonia and nitrate; and the TN, TP, PAHs, and heavy metal were significantly different in the stormwater runoff on each underlying surface. The pollutant concentration in urban road runoff was the highest, accounting for 40–70% of the total pollutant concentration in the stormwater runoff, and the pollutant concentration in green roof runoff was the lowest, accounting for 10–40% of the total pollutant concentration in the runoff. An obvious effect of initial rainfall erosion was observed during stormwater runoff from urban roads and parking lots, and the scouring effect on grasslands and green roofs was mainly due to the many factors affecting the underlying surface during the middle and late stages. The rates of reduction of heavy metals were the most significant. The effect of water purification was positively correlated with stormwater runoff duration. The rates of reduction of TN, heavy metals (Cr, Cd, and Hg), and PAHs in the grassland areas were 35.20 ± 26.28, 0.24 ± 10.13, 71.77 ± 10.97,32.62 ± 110.48, and 41.30 ± 8.78%, respectively. This study could provide a theoretical basis for preventing and managing pollutants in urban stormwater runoff.

Study on water purification effects and microbial community compositions of the estuarine wetland buffer zones during a low-temperature period

The estuarine wetland buffer zone of the Fuhe river plays an important role in terms of improving water quality of Baiyangdian lake. In this study, the water purification effect and microbial community composition of an estuarine wetland buffer zone during a low-temperature period were investigated (March, 2021). The results indicated that the pre-sedimentation ecological pond (Pep), the subsurface flow wetland (Sfw), and the aquatic plant pond (App) exhibited good removal effects on total phosphorus (TP) and NH3-N. In contrast, the removal effects on chemical oxygen demand (COD) and total nitrogen (TN) was unsatisfied. Various phosphorus removal bacteria were detected in the water samples from the Pep and the Sfw, such as Arthrobacter, Flavobacterium, and Planococcus. These findings indicated the water purification performance and the microbial community composition in an estuarine wetland buffer zone during a low-temperature period.

Research Progress on Water Purification Efficiency of Multiplant Combination in Constructed Wetland

The constructed wetland has the powerful purification sewage function, the plant is the core of the constructed wetland, playing the vital role in the water body decontamination restoration process. The common plant species in constructed wetland were summarized and classified (floating plants, floating plants, emergent plants, submerged plants, ornamental plants and economical plants). The factors and basic principles that need to be considered when configuring a variety of plants in a constructed wetland combination for decontamination are described, including decontamination purification capacity, environmental adaptability, and the economic and ornamental value of multiple plants, etc. The current research contents and directions are emphatically reviewed, focusing on the functions and efficacy of nitrogen and phosphorus removal and purification of heavy metal wastewater by various plant combinations in constructed wetlands. It is pointed out that there are many shortcomings in the research of decontamination process of many plants, such as imperfect planting standards, lacking of research on the mechanism of decontamination among various plants, between various plants and substrates, and root microorganisms. Many kinds of plants have not been dealt with properly after harvesting, resulting in waste of resources and secondary pollution and other problems. Therefore, in the future research on the purification and restoration of various plant waters in constructed wetlands, a universally applicable planting specification for various plants in constructed wetlands should be formulated; exploring and analyzing how various plants and various plants interact with substrates and root microorganisms function to achieve water purification and repair effects; In addition, fuel ethanol technology, Biogas fermentation and biomass solid fuel technology should be developed to realize the resource reuse of wetland plants and improve the purification efficiency of wetland plants.

Emergy and eco-exergy evaluation of wetland reconstruction based on ecological engineering approaches in the three Gorges Reservoir, China

Wetland reconstruction is an effective way to solve the severe environmental problems caused by natural disasters and human activities. In this study, we implemented three wetland reconstruction projects based on three ecological engineering approaches, the woodland and dike-pond complex (WDPC), the multifunctional and multistrip buffer complex (MMBC), and the multidimensional wetland complex (MWC), in the water-level fluctuation zone of Hanfeng Lake in the Three Gorges Reservoir (TGR), China. Then, the three wetland reconstruction projects were evaluated for quantity and quality by using the emergy and eco-exergy methods. The results showed that after the implementation of wetland reconstruction projects, the species biodiversity, water purification, slope protection and landscape effects were all greatly improved. The emergy density for each project was 3.40E + 17 sej yr−1 ha−1 for the WDPC, 4.49E + 17 sej yr−1 ha−1 for the MMBC, and 4.05E + 17 sej yr−1 ha−1 for the MWC. The emergy sustainability index (ESI) values for the three reconstructed wetland ecosystems were 163.35, 18.48 and 18.12. These results showed that the three projects, which were dominated by renewable energy flows, were highly sustainable over a long-term period. In addition, the eco-exergy density for each project was 1.29E + 12 j yr−1 ha−1 for the WDPC, 1.00E + 13 j yr−1 ha−1 for the MMBC, and 4.44E + 12 j yr−1 ha−1 for the MWC, and the emergy/exergy ratios were 2.64E + 05, 4.47E + 04 and 9.12E + 04, respectively. These results showed that the submergence-tolerant vegetation slowed the decrease in eco-exergy in the three reconstructed ecosystems and then slowed the reverse evolution speed of these ecosystems in the water-level fluctuation zone. The design concepts for these wetland reconstruction projects is a new approach in the TGR, which can serve as a demonstration and reference for other areas of the TGR and other countries of the world.

The usefulness of ascorbic acid degradation to analyze the effectiveness of water filtration in household water filter jugs

AbstractIntroduction: This study aimed to determine whether the degradation of ascorbic acid in aqueous solutions could be used to compare the filtration efficiency of various household water filter jugs.Materials and methods: Based on absorbance measurements of ascorbic acid, a new water quality coefficient (WQC) parameter was defined. Differences between the WQC were determined for 4 different water filters commonly used in household water filter jugs in Poland. In addition, correlations between the WQC, the amount of filtered water (AFW), and a number of other parameters were examined for all 4 filters.Conclusions: Significant differences were found in WQC among the 4 filters. A decreasing efficiency of calcium ion removal from the water was observed with the ongoing use of all 4 filter cartridges. Overall, this method could be a sensitive, simple, fast, eco-friendly, and relatively inexpensive tool for determining the effectiveness of water purification in household water filter jugs, which of course requires further research.

Trade-off analyses and optimization of water-related ecosystem services (WRESs) based on land use change in a typical agricultural watershed, southern China

As the direct manifestation of human activities, land use change is the main driving factor in variations in ecological processes and ecosystem services (ESs). For better land use management in the future, it is essential to evaluate the changes of ESs affected by land use change and identify the relationships among ESs. In this study, four primary water-related ecosystem services (WRESs), including water yield, food production, water purification and soil conservation, were selected to assess the effects of past land use change (1980–2015) on WRESs in the Xiangjiang River Basin, a typical agricultural watershed in southern China. From 1980 to 2015, water yield, food production increased by 1.58% and 44.78%, respectively. And soil conservation was improved with a 13.11% decrease in sediment export. Because of the rapid expansion of agriculture and urbanization from 2000 to 2015, water purification was degraded significantly with the increase in nitrogen export (+22.56%) and phosphorus export (+25.85%). Trade-offs mainly occurred between water purification and other WRESs. Based on the existing ecological problem, four alternative land use scenarios were designed to explore the underlying effects of various land use polices. Among four scenarios, the combined scenario was selected as the optimal scenario because of the greatest improvement in water purification and small negative effect on food production. Our research provides an integrated WRESs trade-offs assessment framework. Moreover, the establishment of multiple land use scenarios based on land suitability evaluation could inform future land use decision-making and water conservation management in the agricultural watershed.

Evaluating the UV radiation effectiveness in industrial aquaculture

The paper presents an analysis of the bacterial purification effectiveness by UV radiation of wastewater in modern industrial aquaculture recirculation systems. the effectiveness of water purification in the ultrasound system by a set of filters for mechanical treatment and ultraviolet radiation is experimentally established. UV lamp allows to process water with rays that effectively destroy the organic matter formed in it. Pathogenic and conditionally pathogenic genera, such as: Aeromonas, Pseudomonas, Staphylococcus, Vibrio, Enterobacteria were differentiated.

RABANI ( Reaktor Baru Wudhu Masa Kini) : Sistem Daur Ulang Air Wudhu yang Syar’i Berbasis Neo

Indonesia is the country with the largest adherents of Islam in the world. The number of adherents of Islam is around 212.5 million people or about 80% of the total population. With the number of mosques in Indonesia around 731,096 buildings in 2013. Every Muslim (adherent of Islam) before praying always cleanses certain body parts commonly called ablution so that it is estimated that the use of water for ablution in a day is around 1.8 million m3. The dry season that occurred in the last few months has caused many areas to experience a clean water crisis. The use of water must be carried out optimally. Islam teaches how to be frugal and fair as taught in the apostles' Sunnah. Therefore, there is a need for a system designed to recycle used ablution so that it can be reused into ablution water. RABANI uses the NEO method (membrane based zeolite, electrocoagulation and ozonation) nanofiltration. The combination of several methods of water purification will increase the effectiveness of water purification so that better quality water is produced. This system produces output products in the form of clean water that is suitable for reuse for the purification process.Keywords: Water ablution, ozonizasi, referring

MATHEMATICAL MODELING OF WATER PURIFICATION WITH FILTER

Purpose. To analyze the effectiveness of water purification in water treatment systems, an important task is the development of mathematical models that allow determining the degree of water purification at the design stage. The main purpose of the work is to construct numerical models for calculating the filtration process and mass transfer in the filter. Methodology. The calculation of the filtering process of contaminated water in the filter is carried out in two stages. At the first stage, the flow rate field in the filter is calculated. To solve this problem, the classical filtration equations are used. At the second stage of the calculation, the flow of contaminated water in the filter is simulated. To solve this problem, the mass transfer equation is used, which expresses the law of mass conservation. This equation takes into account the transfer of impurities by the filtration flow, the transfer of impurities due to dispersion and the sorption of impurities in the filter material. The solution of the filtration equation is carried out using the alternating triangular method of A. A. Samarskyi. The unknown pressure value based on this method is determined by the explicit formula of point-to-point computation. For numerical integration of the mass transfer equation in the filter, a difference splitting scheme is used. Findings. The current trend in the field of water supply and sanitation is the creation of multidimensional and multifactor mathematical models. Such models make it possible to replace a physical experiment with a computational one. The complex of water treatment facilities necessarily includes water purification filters. The filter efficiency affects the efficiency of other treatment facilities of the technological treatment scheme. A mathematical model has been developed that allows analyzing the water purification process in the filter. Based on the developed numerical model, a package of application programs has been developed for computer simulation of the filter water purification process. The results of a computational experiment on modeling the filtering process of contaminated water in a filter are presented. Originality. The paper proposes a numerical two-dimensional filter model based on the filtration equation and the mass transfer equation. A feature of the developed mathematical models is the possibility of modeling the velocity field and the process of impurity transfer taking into account the geometric shape of the filter. Practical value. The calculation time for one variant of the task based on the developed numerical model is several seconds, which is important for conducting serial calculations in practice. Models can be used as an alternative to laboratory experiments.