Abstract The paper presents a proprietary procedure for the analysis of normal stress distributions in post-tensioned cross-sections. It has a significant advantage over conventional commonly used approaches based solely on the envelope analysis as it provides stress levels in all components of the cross-section. The procedure was used in a series of probabilistic analyses with the adoption of random fields. These fields represented uncertainties in strain-stress relationship in concrete. The analysis covered several types of cross-sections and several types of random fields. Key observations from the conducted simulations are as follows: (I) the widest ranges of the probable maximum stresses (i.e. the lowest indexes of reliability) were obtained for sections with relatively low heights of the compressive zone. (II) The highest probabilistic sensitivity to the type of random field used was found in tall sections with a relatively large compressive zone. (III) The greatest sensitivity to batch uncertainties was evident in all cross-sections when using squared exponential random fields. (IV) The greatest relative sensitivity to the batch uncertainties in the form of the random field compliant with the guidelines of the Joint Comity of Structural Safety (JCSS) was evident in the analyses of the tallest cross-section corresponding to the incrementally launched bridges.
{"title":"Theoretical Probabilistic Nonlinear Analysis of Post-Tensioned Bridge Cross-Sections with the Application of Random Fields","authors":"P. Owerko","doi":"10.2478/acee-2023-0022","DOIUrl":"https://doi.org/10.2478/acee-2023-0022","url":null,"abstract":"Abstract The paper presents a proprietary procedure for the analysis of normal stress distributions in post-tensioned cross-sections. It has a significant advantage over conventional commonly used approaches based solely on the envelope analysis as it provides stress levels in all components of the cross-section. The procedure was used in a series of probabilistic analyses with the adoption of random fields. These fields represented uncertainties in strain-stress relationship in concrete. The analysis covered several types of cross-sections and several types of random fields. Key observations from the conducted simulations are as follows: (I) the widest ranges of the probable maximum stresses (i.e. the lowest indexes of reliability) were obtained for sections with relatively low heights of the compressive zone. (II) The highest probabilistic sensitivity to the type of random field used was found in tall sections with a relatively large compressive zone. (III) The greatest sensitivity to batch uncertainties was evident in all cross-sections when using squared exponential random fields. (IV) The greatest relative sensitivity to the batch uncertainties in the form of the random field compliant with the guidelines of the Joint Comity of Structural Safety (JCSS) was evident in the analyses of the tallest cross-section corresponding to the incrementally launched bridges.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"13 1","pages":"127 - 136"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86760101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The paper describes two models for determining the constrained elasticity modulus of organic soils based on the settlement of an overloading embankment. In these methods, based on the settlement of the embankment of the load exerted on the subsoil, using the inverse problem, it is possible to determine the constrained modulus. A parameter determined in this way can also be determined during consolidation. Changes in the settlement at successive stages of consolidation can be used to determine the constrained modulus of the organic soil at a given point in time. Assuming a “temporarily stable” (quasi-stationary) state at each analysed stage of consolidation. The constrained elasticity modulus was determined for the settling at a given moment. constrained modulus tests of organic soils were carried out for two embankments previously described in the literature. In this case, the modulus was also analysed during consolidation. These embankments are founded on peat and peat-gyttja substrates. In both cases, the layer of organic soil was 4 m. The presented methods with the assumption of a one-dimensional state of deformation, despite the state of spatial stress, can be used during construction using the “design and build” technology. The constrained modulus determined from the embankment overload will represent the actual deformations – volumetric deformations (including other deformations that actually occurred) during the consolidation period. The paper was concluded with several conclusions.
{"title":"Analysis of Using the Empirical Model of Organic Soil Consolidation to Predict Settlement","authors":"Z. Meyer, M. Olszewska","doi":"10.2478/acee-2023-0020","DOIUrl":"https://doi.org/10.2478/acee-2023-0020","url":null,"abstract":"Abstract The paper describes two models for determining the constrained elasticity modulus of organic soils based on the settlement of an overloading embankment. In these methods, based on the settlement of the embankment of the load exerted on the subsoil, using the inverse problem, it is possible to determine the constrained modulus. A parameter determined in this way can also be determined during consolidation. Changes in the settlement at successive stages of consolidation can be used to determine the constrained modulus of the organic soil at a given point in time. Assuming a “temporarily stable” (quasi-stationary) state at each analysed stage of consolidation. The constrained elasticity modulus was determined for the settling at a given moment. constrained modulus tests of organic soils were carried out for two embankments previously described in the literature. In this case, the modulus was also analysed during consolidation. These embankments are founded on peat and peat-gyttja substrates. In both cases, the layer of organic soil was 4 m. The presented methods with the assumption of a one-dimensional state of deformation, despite the state of spatial stress, can be used during construction using the “design and build” technology. The constrained modulus determined from the embankment overload will represent the actual deformations – volumetric deformations (including other deformations that actually occurred) during the consolidation period. The paper was concluded with several conclusions.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"36 1","pages":"111 - 117"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76361731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The paper presents the results of the experimental research on the air grills designed to stop backflows in natural ventilation stacks. For each grill pressure drop was measured for different airflow rates, in both flow directions. Two ∅ 100 mm grills working on different principles were tested: one with moving flaps, and one shaped in a way that should greatly increase the hydraulic losses during backflow. For comparison, the ordinary air grill was also tested. The results show that the grill with moving flaps works as intended. With only slightly higher hydraulic losses in the forward direction compared to ordinary grill, it shuts off the backflows almost completely. The other, diffuser-shaped grill doesn’t work as intended. It has very high hydraulic losses in both directions, and the effect of changing the air resistance with the reverse flow is barely noticeable.
{"title":"Air Grilles Designed to Prevent Backflows in Natural Ventilation Stacks – Experimental Investigation","authors":"Piotr Koper, Dominik Szpank","doi":"10.2478/acee-2023-0025","DOIUrl":"https://doi.org/10.2478/acee-2023-0025","url":null,"abstract":"Abstract The paper presents the results of the experimental research on the air grills designed to stop backflows in natural ventilation stacks. For each grill pressure drop was measured for different airflow rates, in both flow directions. Two ∅ 100 mm grills working on different principles were tested: one with moving flaps, and one shaped in a way that should greatly increase the hydraulic losses during backflow. For comparison, the ordinary air grill was also tested. The results show that the grill with moving flaps works as intended. With only slightly higher hydraulic losses in the forward direction compared to ordinary grill, it shuts off the backflows almost completely. The other, diffuser-shaped grill doesn’t work as intended. It has very high hydraulic losses in both directions, and the effect of changing the air resistance with the reverse flow is barely noticeable.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"107 1","pages":"161 - 169"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86000065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The selection of appropriate technological processes for water treatment has a key impact on the qualitative safety of water intended for human consumption. The article analyzes water treatment processes used in a selected Water Treatment Plant (WTP) in terms of surface and ground water treatment. Five-year results of the research are presented on selected physico-chemical and bacteriological parameters of water quality before treatment processes, after individual stages of treatment (settling tanks, DynaSand® filters, ozonation, carbon filters, UV rays and chlorine gas disinfection). The reduction of key pollutants at individual stages of technological processes was calculated. The results of the analyzes demonstrated that the technological processes used in WTP effectively remove turbidity, color, UVA254nm, permanganatate oxygen demand, Fetotal, Mn, coliform bacteria, Enterococcus faecalis and Clostridium Perfringens from the surface and underground water. Studies have shown that infiltration in the ground effectively removes selected pollutants from water and its effectiveness is comparable to high-efficiency treatment processes.
{"title":"The Role of Selected Technological Processes in Drinking Water Treatment","authors":"Iwona Wiewiórska","doi":"10.2478/acee-2023-0028","DOIUrl":"https://doi.org/10.2478/acee-2023-0028","url":null,"abstract":"Abstract The selection of appropriate technological processes for water treatment has a key impact on the qualitative safety of water intended for human consumption. The article analyzes water treatment processes used in a selected Water Treatment Plant (WTP) in terms of surface and ground water treatment. Five-year results of the research are presented on selected physico-chemical and bacteriological parameters of water quality before treatment processes, after individual stages of treatment (settling tanks, DynaSand® filters, ozonation, carbon filters, UV rays and chlorine gas disinfection). The reduction of key pollutants at individual stages of technological processes was calculated. The results of the analyzes demonstrated that the technological processes used in WTP effectively remove turbidity, color, UVA254nm, permanganatate oxygen demand, Fetotal, Mn, coliform bacteria, Enterococcus faecalis and Clostridium Perfringens from the surface and underground water. Studies have shown that infiltration in the ground effectively removes selected pollutants from water and its effectiveness is comparable to high-efficiency treatment processes.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"1 1","pages":"189 - 200"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82046642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In this paper authors have described the analytical method of continuous static load test Q-s curve conversion for any given pile. Authors have used data sets from static load tests conducted by Energopol Szczecin S.A. in a full range of loads which allows to use of measured values of pile maximum bearing capacity and determine relation between it and pile length and diameter. All the piles used in this paper were CFA piles bored in mostly loam soil conditions. The research described in this work was based on the Meyer-Kowalow method (M-K method) of static load test interpretation. The M-K method allows for a full description of the load-settlement relation, as a continuous curve (M-K curve) using three parameters that described pile-soil interaction. As a result of conducted research relations between parameters describing M-K curve and pile dimensions were established, which allows for a practical application of the proposed method. In this paper, the authors presented an example of the practical use of curve conversion to analyze the impact of changes in geometric dimensions on pile-soil interaction. The proposed method allows for a curve conversion of the total resistance curve, as well as a curve describing base and skin resistances.
{"title":"An Attempt to Analytically Determine Course of the Continuous Q-S Curve in Case of Changed Pile Length or Diameter","authors":"Z. Meyer, Kamil Stachecki","doi":"10.2478/acee-2023-0021","DOIUrl":"https://doi.org/10.2478/acee-2023-0021","url":null,"abstract":"Abstract In this paper authors have described the analytical method of continuous static load test Q-s curve conversion for any given pile. Authors have used data sets from static load tests conducted by Energopol Szczecin S.A. in a full range of loads which allows to use of measured values of pile maximum bearing capacity and determine relation between it and pile length and diameter. All the piles used in this paper were CFA piles bored in mostly loam soil conditions. The research described in this work was based on the Meyer-Kowalow method (M-K method) of static load test interpretation. The M-K method allows for a full description of the load-settlement relation, as a continuous curve (M-K curve) using three parameters that described pile-soil interaction. As a result of conducted research relations between parameters describing M-K curve and pile dimensions were established, which allows for a practical application of the proposed method. In this paper, the authors presented an example of the practical use of curve conversion to analyze the impact of changes in geometric dimensions on pile-soil interaction. The proposed method allows for a curve conversion of the total resistance curve, as well as a curve describing base and skin resistances.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"5 1","pages":"119 - 126"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84929621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract A masonry basement wall was heavily dampened due to the lack of waterproofing in the ground contact area. Internal sand-lime wall plaster samples were subjected to chemical, physical and strength tests. The main phases of the damaged plaster were quartz and calcite. A measuring method of the tensile strength of plasters was proposed. A polar-symmetric deformation problem of a thick-walled spherical tank, allowing for the estimation of circumferential stresses in the spherical model was used for the analysis. It was found that the same values of porosity correspond to identical values of circumferential stresses, regardless of the values of the radii of the analyzed model. Thus the purpose of the presented research was to demonstrate that the mentioned dependence applied in the adopted model may be useful for the analysis of problems involving the resistance of internal plaster structure to the expansion caused by crystallization pressure.
{"title":"Analysis of the Degradation Process of Sand-Lime Plasters Under the Impact of Crystallization Pressure","authors":"J. Ślusarek, B. Słomka-Słupik, J. Bochen","doi":"10.2478/acee-2023-0023","DOIUrl":"https://doi.org/10.2478/acee-2023-0023","url":null,"abstract":"Abstract A masonry basement wall was heavily dampened due to the lack of waterproofing in the ground contact area. Internal sand-lime wall plaster samples were subjected to chemical, physical and strength tests. The main phases of the damaged plaster were quartz and calcite. A measuring method of the tensile strength of plasters was proposed. A polar-symmetric deformation problem of a thick-walled spherical tank, allowing for the estimation of circumferential stresses in the spherical model was used for the analysis. It was found that the same values of porosity correspond to identical values of circumferential stresses, regardless of the values of the radii of the analyzed model. Thus the purpose of the presented research was to demonstrate that the mentioned dependence applied in the adopted model may be useful for the analysis of problems involving the resistance of internal plaster structure to the expansion caused by crystallization pressure.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"70 1","pages":"137 - 149"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80929637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The article is devoted to important issues of perspective modern organizational tendencies of underground urban space. Innovative world experience of organization of underground space and its use by creating underground buildings and structures for optimal working, living, recreation and movement of the urban population, increasing the area of open green spaces on the surface, creating a comfortable and aesthetically attractive urban environment are reviewed. The ecological, economic, political and cultural features that influence the formation and development of underground space in terms of sustainable development are analyzed. The architectural and spatial structure and functional features of underground permanent cities are considered. The basic modern tendencies of the organization of underground urban space are defined in the town-planning architectural-spatial, functional aspects and aspects of sustainable development.
{"title":"Modern Trends of Organization of the Underground Urban Space","authors":"V.О. Praslova, Yuliia Riabets","doi":"10.2478/acee-2023-0014","DOIUrl":"https://doi.org/10.2478/acee-2023-0014","url":null,"abstract":"Abstract The article is devoted to important issues of perspective modern organizational tendencies of underground urban space. Innovative world experience of organization of underground space and its use by creating underground buildings and structures for optimal working, living, recreation and movement of the urban population, increasing the area of open green spaces on the surface, creating a comfortable and aesthetically attractive urban environment are reviewed. The ecological, economic, political and cultural features that influence the formation and development of underground space in terms of sustainable development are analyzed. The architectural and spatial structure and functional features of underground permanent cities are considered. The basic modern tendencies of the organization of underground urban space are defined in the town-planning architectural-spatial, functional aspects and aspects of sustainable development.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"121 1","pages":"45 - 51"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72699129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Halicioglu, Hande Betül Demirkapı, Kubra Gurel, Nurdan Kasul
Abstract Ensuring higher user satisfaction while reducing building energy consumption is one of the challenges faced by the green building industry since quality comes into view at the level of responding to the environmental and sustainable expectations, health, and comfort needs of green building users. The main objective of this study is to explore the quality indicators in green office buildings. It attempts to answer the question: What are the key quality indicators in evaluating user satisfaction during the operational stage of green office buildings? To that end, a systematic case study review and Pareto analysis are used as a methodological approach. Firstly, a literature review was conducted to determine the quality indicators. Following that, the Pareto analysis was used to find key quality indicators in the literature dataset according to their occurrence frequencies. Finally, the study identified a total of 37 quality indicators and concluded by presenting 23 key quality indicators (kQIs) affecting satisfaction in green office buildings. This study draws attention to the fact that user-oriented quality improvement by getting feedback from the user experiences is inevitable for achieving sustainability goals in green office buildings. It contributes to understanding quality indicators for assessing and enhancing user satisfaction in green office buildings and fills the knowledge gap in the quality improvement of green office buildings.
{"title":"Exploring Key Quality Indicators (KQIS) in Green Office Buildings Through Pareto Analysis","authors":"F. Halicioglu, Hande Betül Demirkapı, Kubra Gurel, Nurdan Kasul","doi":"10.2478/acee-2023-0012","DOIUrl":"https://doi.org/10.2478/acee-2023-0012","url":null,"abstract":"Abstract Ensuring higher user satisfaction while reducing building energy consumption is one of the challenges faced by the green building industry since quality comes into view at the level of responding to the environmental and sustainable expectations, health, and comfort needs of green building users. The main objective of this study is to explore the quality indicators in green office buildings. It attempts to answer the question: What are the key quality indicators in evaluating user satisfaction during the operational stage of green office buildings? To that end, a systematic case study review and Pareto analysis are used as a methodological approach. Firstly, a literature review was conducted to determine the quality indicators. Following that, the Pareto analysis was used to find key quality indicators in the literature dataset according to their occurrence frequencies. Finally, the study identified a total of 37 quality indicators and concluded by presenting 23 key quality indicators (kQIs) affecting satisfaction in green office buildings. This study draws attention to the fact that user-oriented quality improvement by getting feedback from the user experiences is inevitable for achieving sustainability goals in green office buildings. It contributes to understanding quality indicators for assessing and enhancing user satisfaction in green office buildings and fills the knowledge gap in the quality improvement of green office buildings.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"9 1","pages":"15 - 27"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84235406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract In recent years, the concept of developing sports cities has gained popularity and become a notable trend. Urban public spaces have played an important role as suitable venues for informal sporting activities in cities. Policymakers and scholars have come to realize that an aesthetically pleasing and well-designed public space can encourage and increase participation in sports. This systematic review aims to identify the factors that influence the shaping of public spaces for sports cities accessible to all. Ten electronic databases were searched to identify relevant studies published between 2010 and 2022. The data were independently assessed and extracted by two reviewers. Full-text copies of 68 articles were read, and 24 articles meeting the inclusion criteria were included in this review. A synthesized descriptive analysis of the data was then performed. The results of this review identified factors that influence the shaping of urban public spaces for sports cities, including spatial sports facilities, organizational and programmatic factors, and environmental factors. Some factors can facilitate sports and physical activity, while others may act as barriers and have a negative impact on participants. This study recommends summarizing the policy and practice implications of these results for promoting sports cities to address these barriers and make sporting activities more accessible to all.
{"title":"What Factors Influence the Shaping of Urban Public Spaces for Sports Cities? A Systematic Review","authors":"Najmaldin Al-Taesh, K. Ujma-Wąsowicz","doi":"10.2478/acee-2023-0011","DOIUrl":"https://doi.org/10.2478/acee-2023-0011","url":null,"abstract":"Abstract In recent years, the concept of developing sports cities has gained popularity and become a notable trend. Urban public spaces have played an important role as suitable venues for informal sporting activities in cities. Policymakers and scholars have come to realize that an aesthetically pleasing and well-designed public space can encourage and increase participation in sports. This systematic review aims to identify the factors that influence the shaping of public spaces for sports cities accessible to all. Ten electronic databases were searched to identify relevant studies published between 2010 and 2022. The data were independently assessed and extracted by two reviewers. Full-text copies of 68 articles were read, and 24 articles meeting the inclusion criteria were included in this review. A synthesized descriptive analysis of the data was then performed. The results of this review identified factors that influence the shaping of urban public spaces for sports cities, including spatial sports facilities, organizational and programmatic factors, and environmental factors. Some factors can facilitate sports and physical activity, while others may act as barriers and have a negative impact on participants. This study recommends summarizing the policy and practice implications of these results for promoting sports cities to address these barriers and make sporting activities more accessible to all.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"527 ","pages":"1 - 13"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72495398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The paper presents the influence of the quality of water subjected to treatment on the filtration process, using self-cleaning DynaSand filters with contact coagulation. Technological factors directly influencing the filtration process and filtrate quality were identified, e.g. variable flows, retention time on filter bed and filtration speed. In addition, the purification process of rinse water in the Lamella separator and its impact on the filtration process were investigated. The Lamella separator combined with the flocculation tank, in which the coagulation, flocculation and sedimentation processes are carried out, is an excellent solution to the problem involving the formation of large amounts of rinse water after washing the sand bed of DynaSand filters. The rinse water of fast filters is cleaned on the Lamella separator and returned to the beginning of the filtration system, before DynaSand filters. This solution allows to minimize water losses in the discussed WTP.
{"title":"Impact of Variable Technological and Quality Factors on the Efficiency of Filtration Processes Using Dynasand Filters and Lamella Separator","authors":"Iwona Wiewiórska","doi":"10.2478/acee-2023-0027","DOIUrl":"https://doi.org/10.2478/acee-2023-0027","url":null,"abstract":"Abstract The paper presents the influence of the quality of water subjected to treatment on the filtration process, using self-cleaning DynaSand filters with contact coagulation. Technological factors directly influencing the filtration process and filtrate quality were identified, e.g. variable flows, retention time on filter bed and filtration speed. In addition, the purification process of rinse water in the Lamella separator and its impact on the filtration process were investigated. The Lamella separator combined with the flocculation tank, in which the coagulation, flocculation and sedimentation processes are carried out, is an excellent solution to the problem involving the formation of large amounts of rinse water after washing the sand bed of DynaSand filters. The rinse water of fast filters is cleaned on the Lamella separator and returned to the beginning of the filtration system, before DynaSand filters. This solution allows to minimize water losses in the discussed WTP.","PeriodicalId":8117,"journal":{"name":"Architecture Civil Engineering Environment","volume":"22 1","pages":"177 - 187"},"PeriodicalIF":0.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86177902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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