Analysis of disinfectant decay in a water supply system based on mathematical model

Zimoch, Izabela; Bartkiewicz, Ewelina

doi:10.5004/dwt.2018.23036

Cited by 9 publications

(1 citation statement)

References 17 publications

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“…Innovative solutions, new technologies, and a variety of digital tools that can support the effective management and monitoring of oversized WSS operations have been developed, resulting in the improvement of the hydraulic conditions of the water pipe network and minimization of the risk of secondary water contamination during its distribution. Artificial neural networks (ANNs), numerical hydraulic and quality simulation models (e.g., EPANET, Piccolo, Mike Net, WaterCad) are increasingly used as forecasting tools in relation to water supply issues, including, for example, prediction of disinfection byproducts in the distribution network, modeling chlorine residuals in transported drinking water to the consumer, as well as energy management [18][19][20]. Energy efficiency management of oversized WSS requires the fulfillment of a number of functions such as planning, organizing, directing, and monitoring at different levels (strategic, operational, tactical).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Water Supply Systems Management for Energy Efficiency: A Case Study

et al. 2021

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A prerequisite for achieving high energy efficiency of water supply systems (understood as using less energy to perform the same task) is the appropriate selection of all elements and their rational use. Energy consumption in water supply systems (WSS) is closely connected with water demand. Especially in the case of oversized water supply systems for which consumers’ water demand is at least 50% less than previously planned and flow velocity in some parts of the system is below 0.01 m·s−1, this problem of excessive energy consumption can be observed. In the literature, it is difficult to find descriptions and methods of energy management for such a case. The purpose of this study was both an evaluation of the current demand of an oversized WSS and a preliminary technical analysis of the possibility for energy saving. Solutions are presented that resulted in improvements in energy management, thus increasing energy efficiency. The conducted analyses indicate the wide use of numerical, hydraulic models, among others, for the needs of the sustainable oversize water supply systems management in order to improve energy efficiency. Those simulations only give energy consumption results as a first step in the process of decision-making for the modernization process, in which investment costs should be taken into account as a second step. Thus, this paper emphasizes the crucial role of hydraulic models as a good analytical tool used in decision support systems (DSS), especially for large, oversized water supply systems.

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Section: Introductionmentioning

confidence: 99%

Sustainable Water Supply Systems Management for Energy Efficiency: A Case Study

et al. 2021

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Removal of organic matter from the underground water—a pilot scale technological research

Pruss

Komorowska-Kaufman

Pruss³

2021

Appl Water Sci

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The aim of the study was to select an appropriate technology for the treatment of groundwater with particular emphasis on the effectiveness of organic matter removal. The technological research was carried out on a pilot scale for 6 weeks. The pilot station was supplied with groundwater taken from two wells with different physical and chemical composition and mixtures of the two waters. The installation of the pilot station enabled different configuration of technological processes and continuous water sampling past each device. The following parameters were determined for the water samples: temperature, pH, alkalinity, colour, turbidity, COD KMnO4, TOC and dissolved oxygen, total and bivalent iron and manganese. On the basis of the analysis of the test results, it was found that the treatment technology based on natural aeration and rapid filtration processes was effective for water from well no. 2 and the mixtures of waters from well no. 1 and well no. 2, and the quality of treated water was in accordance with the limits specified in the Regulation of the Polish Minister of Health.

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Impact of the modernized technology on the quality of water supplied to the extended distribution system of the city of Poznań

Lasocka-Gomuła

Świetlik

2022

Appl Water Sci

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The paper presents the results of a long-term study covering the development, implementation and operation of the second stage of water treatment (i.e. ozonation and subsequent granular active carbon (GAC) filtration) in the “Mosina” water treatment station supplying drinking water to the city of Poznań. The basis for the modernisation of the system was the high reactivity of the natural organic matter (NOM) present in the treated water with the disinfectant (in this case chlorine dioxide) resulting in an increased demand for ClO2 and reduced microbiological stability of the water. During the study it was shown that simple carboxylic acids are generated during ozonation and their presence can be an indicator of the microbiological stability of the treated water. However, these compounds are effectively removed from water during filtration through biologically active GAC filters. It was also shown that the best and cheapest parameter allowing to control water quality at individual stages of its treatment is UV absorbance, which shows reactive components of NOM removal efficiency in the technological sequence. The effectiveness of the modernisation of the technological system was evaluated on the basis of the disinfectant demand as well as on the basis of selected carboxylic acids concentration in the intake points on the water supply network fed with water from the WTS “Mosina”. At the last stage of the study, it was observed that the concentration of carboxylic acids in the distribution network was significantly reduced and stabilised, and a low dose of chlorine dioxide did not cause their re-formation. As a result of the modernisation, a new balance was achieved between the disinfectants used and the NOM compounds present in the treated water. Thus, the results confirmed that properly conducted pilot studies are a required element in planning of modernisation changes for water supply facilities.

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Analysis of disinfectant decay in a water supply system based on mathematical model

Cited by 9 publications

References 17 publications

Sustainable Water Supply Systems Management for Energy Efficiency: A Case Study

Sustainable Water Supply Systems Management for Energy Efficiency: A Case Study

Removal of organic matter from the underground water—a pilot scale technological research

Impact of the modernized technology on the quality of water supplied to the extended distribution system of the city of Poznań

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