Optimization of inline coagulation in integrated membrane systems
Pivokonský, Martin; Prokopová, Michaela; Dytrych, Pavel; Krystyník, Pavel
2023 - Czech
The report summarizes the results of chemical coagulation and electrocoagulation optimisation tests as integrated membrane filtration methods. Optimization tests were performed with filtered water after alkalinisation using jar tests, based on which optimal reaction conditions such as the dose of the coagulation agent and the pH value were found. In addition to removing the non-coagulated portion of dissolved organic substances using electrocoagulation, the conditions for eliminating manganese were also tested. Zpráva shrnuje výsledky optimalizačních testů chemické koagulace a elektrokoagulace jako doprovodné metody k membránové filtraci. Optimalizační testy byly provedeny s filtrovanou vodou po alkalizaci pomocí koagulačních (sklenicových) zkoušek, na jejichž základě byly nalezeny optimální reakční podmínky (dávka koagulačního činidla a hodnota pH). Vedle odstraňování nezkoagulovaného podílu rozpuštěných organických látek pomocí elektrokoagulace byly testovány i podmínky eliminace manganu.
Keywords:
electrocoagulation; coagulation; drinking water treatment
Available at various institutes of the ASCR
Optimization of inline coagulation in integrated membrane systems
The report summarizes the results of chemical coagulation and electrocoagulation optimisation tests as integrated membrane filtration methods. Optimization tests were performed with filtered water ...
Digital twin skin of the drinking water treatment plant - development and use in practice
Sochorová, Helena; Andreides, D.; Hložanka, F.; Prokopová, Michaela; Stejskal, O.; Chalupa, L.; Šmejkalová, P.; Dolejš, P.
2023 - Czech
The contribution presents experiences with the development of a digital twin for optimizing the control of the DWTP within the pilot project in the Železná Ruda locality. The digital twin consists of two components, i.e. digital documentation in the object architecture processed by the reverse engineering process, which is data-connected with the real physical infrastructure (virtual replica of the infrastructure) and a simulation tool based on a mathematical model or a neural network (simulation of the water treatment process). Both components are accessible to the user via a web application, in which one can choose from three operating states (monitoring of the real state - default, simulation of scenarios of operating settings and prediction of pressure loss). Příspěvek představuje zkušenosti s vývojem digitálního dvojčete pro optimalizaci řízení ÚV v rámci pilotního projektu v lokalitě Železná Ruda. Digitální dvojče se skládá ze dvou komponent, a to digitální dokumentace v objektové architektuře zpracované postupem reverzního inženýrství, která je datově propojená s reálnou fyzickou infrastrukturou (virtuální replika infrastruktury) a ze simulačního nástroje na základě matematického modelu anebo neuronové sítě (simulace procesu úpravy vody). Obě komponenty jsou uživateli přístupné přes webovou aplikaci, ve které lze volit ze tří provozních stavů (monitoring reálného stavu - defaultní, simulace scénářů provozních nastavení a predikce tlakové ztráty).
Keywords:
digital twin; water quality; control optimization; reverse engineering; water treatment
Available at various institutes of the ASCR
Digital twin skin of the drinking water treatment plant - development and use in practice
The contribution presents experiences with the development of a digital twin for optimizing the control of the DWTP within the pilot project in the Železná Ruda locality. The digital twin consists of ...
Analysis of the flow of a bimodal suspension at the pipe wall
Chára, Zdeněk; Matoušek, Václav; Novotný, Jakub; Konfršt, Jiří
2022 - Czech
In the paper, the attention is focused on the flow of bimodal suspensions, where the coarse fraction is combined with the fine fraction with the resulting effect of reducing the total pressure losses. Using the PIV and PTV methods, the flow at the bottom of the pipe is analyzed. Using this approach, the velocities of both the bimodal mixture and the individual particle velocities of the coarse fraction were obtained. The velocities of the coarse particles were higher than the velocities of the fine fraction. V článku je pozornost zaměřena na proudění bimodálních suspenzí, kdy je kombinována hrubá frakce s jemnou s výsledným efektem snížení celkových tlakových ztrát. S využitím metod PIV a PTV je analyzováno proudění u dna potrubí. Tímto přístupem byly získány rychlosti jak bimodální směsi, tak také rychlosti jednotlivých částic hrubé frakce. Rychlosti hrubých částic byly vyšší než rychlosti jemné frakce.
Keywords:
bimodal suspensions; PIV method; PTV method
Available on request at various institutes of the ASCR
Analysis of the flow of a bimodal suspension at the pipe wall
In the paper, the attention is focused on the flow of bimodal suspensions, where the coarse fraction is combined with the fine fraction with the resulting effect of reducing the total pressure losses. ...
Experimental validation of granular flow kinetic theory under turbulent flow conditions
Haidl, Jan; Chára, Zdeněk; Matoušek, Václav
2022 - English
The mixed classical and extended kinetic theory of granular ows is used for modeling the characteristics of particles-water turbulent sheet ow. The open-source solver sedFoam v3.1 is used for the 1-D and 2-D ow simulations. The simulation results are compared to the experimental data measured in the open channel. After that, the simulation parameters are optimized to achieve the best possible agreement between the simulation and the experimental results. The unsatisfactory performance of the KT models and the observed simulation instabilities are discussed.
Keywords:
kinetic theory; granular flow; sedFoam
Available at various institutes of the ASCR
Experimental validation of granular flow kinetic theory under turbulent flow conditions
The mixed classical and extended kinetic theory of granular ows is used for modeling the characteristics of particles-water turbulent sheet ow. The open-source solver sedFoam v3.1 is used for the 1-D ...
Possibilities of perfluorinated organic compounds (PFCs) removal in drinking water treatment plants and their occurrence in drinking water sources in the Czech Republic
Čermáková, Lenka; Fialová, Kateřina; Prokopová, Michaela; Semerád, Jaroslav; Petříček, Radim; Pivokonská, Lenka; Cajthaml, Tomáš; Pivokonský, Martin
2022 - Czech
This summary research report was implemented within the project TAČR TJ04000212 program to support applied research ZÉTA „Possibilities of perfluorinated organic compounds (PFCs) removal in drinking water treatment plants and their occurrence in drinking water sources in the Czech Republic“. This report is addressed to water treatment plant operators and serves as a basic material for optimizing the coagulation / flocculation and adsorption process in water treatment. The report explains in detail the issue of removal of perfluorinated organic substances (PFCs) in water treatment, especially the process of adsorption in pilot plant conditions. This report will be used as a theoretical basis for the operation of the water treatment plant in Kutná Hora operated by the Water Management Company Vrchlice - Maleč, a. s. Tato souhrnná výzkumná zpráva byla realizována v rámci projektu TAČR TJ04000212 programu na podporu aplikovaného výzkumu ZÉTA „Možnosti odstraňování perfluorovaných organických sloučenin (PFCs) na úpravnách pitné vody a jejich výskyt ve zdrojích pitné vody v ČR“. Tato zpráva je určena provozovatelům úpraven vod a slouží jako základní materiál pro optimalizaci procesu koagulace/flokulace a adsorpce při úpravě vody. Zpráva podrobně vysvětluje problematiku odstraňování perfluorovaných organických látek (PFCs) při úpravě vody, zejména procesem adsorpce v poloprovozních podmínkách. Tato zpráva bude použita jako teoretický podklad pro provoz úpravny vody v Kutné Hoře provozovanou Vodohospodářskou společností Vrchlice – Maleč, a. s.
Keywords:
perfluorinated organic substances (PFCs); coagulation / flocculation; adsorption; monitoring
Available at various institutes of the ASCR
Possibilities of perfluorinated organic compounds (PFCs) removal in drinking water treatment plants and their occurrence in drinking water sources in the Czech Republic
This summary research report was implemented within the project TAČR TJ04000212 program to support applied research ZÉTA „Possibilities of perfluorinated organic compounds (PFCs) removal in drinking ...
34th Symposium on Anemometry: Proceedings
Chára, Zdeněk; Klaboch, L.
2022 - Czech
The main topic of the conference was focused on the experimental techniques applied in fluid mechanics. Conference took place after 3 years long break caused by COVID19. Tradiční konfenerce se konala až po třech letech od minulého ročníku z důvodu pandemických opatření v půsledku COVID19. Byla zaměřena na nové poznatky a experimenty na poli experimentální mechaniky tekutin.
Keywords:
proceedings; anemometry; turbulent flow; pipe flow; multiphase flow
Available on request at various institutes of the ASCR
34th Symposium on Anemometry: Proceedings
The main topic of the conference was focused on the experimental techniques applied in fluid mechanics. Conference took place after 3 years long break caused by COVID19.
Report on the hydroledological survey in the Černý Důl, Krkonoše Mts.
Šípek, Václav; Vlček, Lukáš; Zelíková, Nikol
2022 - Czech
The report documents results of hydropedological survey in the Černý Důl, Krkonoše Mts. Two experimental sites were selected based on the requirements of National Park Krkonoše with the aim to determine the effect of bark beetle outbreak on the soil water regime. The report contains description of soil hydraulic properties at two plots (healthy and impacted forest) for several soil horizons which will serve as a basis for hydropedological model.\n Zpráva shrnuje výsledky hydropedologického průzkumu z lokality Černý Důl v Krkonoších. Lokality byly s pracovníky Správy KRNAP vytipovány z důvodu objasnění vlivu gradace kůrovce a odumírání smrkových porostů na vodní režim půdy. Zpráva popisuje hydraulické vlasnoti půd pro několik půdních horizontů na dvou kontrastních lokalitách (zasažené a nezasažené kůrovcem) a bude v rámci projektu sloužit jako podklad pro hydropedologický model.
Keywords:
soil hydraulic properties; soil water retention curve; soil hydrology
Available at various institutes of the ASCR
Report on the hydroledological survey in the Černý Důl, Krkonoše Mts.
The report documents results of hydropedological survey in the Černý Důl, Krkonoše Mts. Two experimental sites were selected based on the requirements of National Park Krkonoše with the aim to ...
Chemical-technological audit of the WTP Tlumačov - assessment of the technology of suspension formation and separation
Pivokonský, Martin; Čermáková, Lenka; Prokopová, Michaela; Fialová, Kateřina; Sochorová, H.; Haidl, Jan
2021 - Czech
The report describes the assessment of the sludge formation and separation technology at the WTP Tlumačov in two measuring cycles (summer 2020 and spring 2021) in profiles: i) aeration, ii) effluent from the reaction tank, iii) flocculation, iv) sediment inflow, v) after sedimentation, vi) inflow to filtration, vii) after filtration, on the right and left line of ÚV Tlumačov. The report assessed the quality of raw and treated water and the effectiveness of destabilization and aggregation. The preparation of the suspension in the phase of fast and slow mixing and separation of flakes were evaluated. Aggregation tests (sedimentometric analysis) were used for this purpose. Předložená zpráva se zabývá posouzením technologie tvorby a separace suspenze na ÚV Tlumačov ve dvou měřících cyklech (léto 2020 a jaro 2021) v profilech: i) za aerací, ii) odtok z reakční nádrže, iii) za flokulací, iv) nátok do sedimentace, v) za sedimentací, vi) nátok na filtraci, vii) za filtrací, a to na pravé i levé lince ÚV Tlumačov. V rámci zprávy byly posouzeny kvalita surové a upravené vody a účinnosti destabilizace a agregace. Zhodnocena byla příprava suspenze ve fázi rychlého a pomalého míchaní a separace vloček. K posouzení uvedeného byly použity testy agregace (sedimentometrická analýza).
Keywords:
aggregation; susspension separation; drinking water treatment
Available at various institutes of the ASCR
Chemical-technological audit of the WTP Tlumačov - assessment of the technology of suspension formation and separation
The report describes the assessment of the sludge formation and separation technology at the WTP Tlumačov in two measuring cycles (summer 2020 and spring 2021) in profiles: i) aeration, ii) effluent ...
Antibacterial electrospun membrane prepared from poly(vinylidene fluoride)-co-hexafluoropropylene with lauric acid monoacylglycerol
Zelenková, Jana; Peer, Petra; Pleva, P.; Janalíková, M.; Sedlaříková, J.; Filip, Petr
2021 - English
The aim of this study was to prepare an antibacterial nanofibrous membrane using electrospinning technique. The nanofibrous membranes were spun from polymer solution of poly(vinylidne fluoride)-co-hexafluoropropylene (PVDF-co-HFP) dissolved in N,N´-dimethylformamide. Monoacylglycerol of lauric acid (MAG C12) was used as an antimicrobial agent at the concentrations ranging from 1 to 3 wt%. The impact of MAG C12 incorporation on the rheological, structural and antibacterial properties was investigated. The rheological tests of polymer solutions, as steady shear and oscillatory shear, proved that addition of MAG C12 changed marginally rheological quantities such as viscosity, elastic (storage) and viscous (loss) moduli. Measurement of mean nanofibres diameter indicated a slight decrease with increasing MAG C12 concentration. Antimicrobial activity of PVDF-co-HFP nanofibre membranes with incorporated MAG C12 against Gram-positive bacteria Staphylococcus aureus and Gram-negative Escherichia coli was studied. An antibacterial activity was revealed for the samples containing MAG C12 at all concentrations against Gram-positive bacteria Staphylococcus aureus by the disk diffusion method.
Keywords:
nanofibres; electrospinning; antibacterial memrane; rheology; polymer solution
Available at various institutes of the ASCR
Antibacterial electrospun membrane prepared from poly(vinylidene fluoride)-co-hexafluoropropylene with lauric acid monoacylglycerol
The aim of this study was to prepare an antibacterial nanofibrous membrane using electrospinning technique. The nanofibrous membranes were spun from polymer solution of poly(vinylidne ...
Optimization of the coagulation/flocculation process at the Myslivny water treatment plant
Pivokonský, Martin; Prokopová, Michaela; Petříček, Radim; Čermáková, Lenka
2021 - Czech
This report describes the raw water quality focusing on the content of natural organic substances, as well as laboratory optimization of coagulation operating parameters - especially the type and dose of coagulating agent and the value of reaction pH and proposing measures necessary to improve the current situation. Zpráva se zabývá popisem kvality surové vody zaměřujícím se především na charakter přítomných organických látek, dále pak laboratorní optimalizací provozních parametrů koagulace – především typem a dávkou koagulačního činidla a hodnotou reakčního pH, a návrhem opatření nutných ke zlepšení současného stavu.
Keywords:
coagulation; flocculation; drinking water treatment; natural organic matter
Available at various institutes of the ASCR
Optimization of the coagulation/flocculation process at the Myslivny water treatment plant
This report describes the raw water quality focusing on the content of natural organic substances, as well as laboratory optimization of coagulation operating parameters - especially the type and dose ...
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