National Repository of Grey Literature 53 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Optimization of laboratory procedures for effective water treatment plant operation
Pivokonský, Martin ; Vašatová, Petra ; Petříček, Radim ; Pivokonská, Lenka ; Novotná, Kateřina
This scientific report has been realized within a TACR project (no. TJ01000169) of the ZÉTA programme aimed at supporting applied research. The report is intended for water treatment plant (WTP) operators and serves as a basic guideline for optimization of the coagulation process in water treatment. In the first part of the report, a methodology of jar tests is briefly described. Conducting the jar test is fundamental for an effective control over the coagulation step in WTP operation. Jar tests are necessary for a determination of the optimum operating conditions of coagulation, i.e., type and dose of the coagulant and coagulation pH value, needed for reaching the highest treatment efficiency. The other part of the report summarizes and evaluates the results of jar test optimization conducted at the WTP in Kutná Hora, and recommendations for optimization of the WTP operation are suggested. Economic aspects of the optimization are then discussed in a separate section.
Adsorption of low molecular weight algal organic matter onto activated carbon during water treatment
Fialová, Kateřina ; Pivokonský, Martin (advisor) ; Kopecká, Ivana (referee)
This diploma thesis deals with the study of adsorption of low-molecular components of organic substances produced by phytoplankton - AOM (Algal Organic Matter) on AC (Activated Carbon) during drinking water treatment. For the experimental purpose in this thesis, there were used selected amino acids as low molecular substances of AOM that are difficult to remove by conventional water treatment process by coagulation. As adsorbent, there was used a detailed characterized of granulated activated carbon (GAC) - Filtrasorb TL 830 (FTL830) which is intended directly for the purpose of water treatment. There were realizing the equilibrium batch adsorption experiments with three different model amino acids - arginine (Arg), phenylalanine (Phe) and aspartic acid (Asp). There was investigated the efficiency of removing amino acid depending on the solution temperature and pH. Results of the adsorption experiments have shown that the temperature affects the adsorption efficiency. Adsorption is essentially described as an exothermic process but the adsorption of Arg and Phe from an aqueous solution to GAC occurs more efficiently at higher temperatures. It means that the adsorption is the endothermic process. In the case of Arg adsorption, the temperature was found to influence adsorption efficiency less than...
Detection of microplastics in water sources and drinking water at the water treatment plants Káraný, Želivka and Podolí
Pivokonský, Martin ; Pivokonská, Lenka ; Čermáková, Lenka ; Novotná, Kateřina
At the request of the company Pražské vodovody a kanalizace, a. s. samples of raw and treated water from three sources serving the Prague agglomeration with drinking water were analyzed. The subject of the analysis was the determination of the amount and composition of microplastic particles.
Microplastics in Drinking Water
Čermáková, Lenka ; Novotná, Kateřina ; Peer, Petra ; Janda, V. ; Pivokonský, Martin
The research was focused on microplastics occurring in water sources and in drinking water. Recently, the topic of microplastics in water is very up to date. However, most of the studies are focused on quantification of microplastics in sea water, sediments or surface waters, which are not a source of raw water for drinking water treatment, and at the same time the most of studies deal with the analysis of particles in the size range of 0.3 - 5 mm. The subject of the present study was to quantify microplastics from 0.2 μm in raw and treated water from three unnamed water treatment plants in the Czech Republic and to determine their size distribution, shape and material composition. It has been found that the number of microplastics ranged from 1414-7006 L-1 particles in raw water and 305-921 L-1 particles in treated water. Microplastics smaller than 10 μm were the most plentiful in both raw and treated water samples. Fragments clearly prevailed at two of the water treatment plants and fibres together with fragments predominated at one case.
Characterization of organic raw and drinking water on Želivka water treatment plant
Pivokonský, Martin ; Čermáková, Lenka ; Pivokonská, Lenka
Natural Organic Matter (NOM) is an important part of surface water. One of the suitable methods of the identification of the composition of NOM is their fractionation based on the principle of sorption of organic matter on ion-exchange resins.
Detection of microplastics in water sources and drinking water on the Káraný water treatment plant
Pivokonský, Martin ; Čermáková, Lenka ; Novotná, Kateřina
At the Káraný water treatment plant there were made water sampling for the detection of microplastic particles. Individual water samples were taken from various sources intended for drinking water production and also at different stages of the treatment process.
The influence of flocculation conditions (global shear rate and time) on the shape and structure of formed aggregates and the efficiency of their separation by sedimentation and filtration
Pivokonský, Martin ; Vašatová, Petra ; Pivokonská, Lenka ; Petříček, Radim ; Filipenská, Monika
A summary research report on the influence of hydrodynamic conditions of flocculation (the intensity of mixing, residence time, etc.) on the property of the aggregates (size, shape, structure, etc.), that have a major impact on the separation steps (sedimentation, filtration) during water treatment. The report will be used by the water treatment plants with the technology of high intensity flocculation.
Influence of preoxidation by potassium permanganate on coagulation of nonproteinaceous compounds produced by alga Chlorella vulgaris
Přech, Jiří ; Pivokonský, Martin (advisor) ; Novotná, Kateřina (referee)
6 Abstract: The presence of phytoplankton and its products (AOM) in source water is a current challenge in water treatment processes. The production of AOM increases with anthropogenic eutrophication of ecosystems. AOM impair the water treatment processes and may form harmful disinfection by-products. The traditional water treatment process is a coagulation, which is very efficient in removing phytoplankton cells, but this is not the case when removing some kinds of AOM. Especially its nonproteinaceous fraction with low molecular weight, which can represent majority of total organic carbon, is removed with very low efficiency. The removal of AOM by coagulation can be enhanced by preoxidation. This thesis examines the influence of preoxidation by potassium permanganate of nonproteinaceous fraction of COM of algae Chlorella vulgaris on its coagulation by aluminium sulphate and polyaluminiumchloride. To compare, solutions with nonproteinaceous COM were coagulated with and without preoxidation by five different doses of permanganate (0,025; 0,05; 0,1; 0,15 a 0,2 mg KMnO4 mg-1 DOC). The doses of permanganate and time need for oxidation (30 minutes) were determined by decreased DOC and permanganate during preoxidation experiments. The maximal DOC removals achieved both with and without preoxidation were 17 %...
Coagulation of different kinds of algal organic matter
Novotná, Kateřina ; Načeradská, Jana ; Barešová, Magdalena ; Janda, V. ; Pivokonský, Martin
This study focused on coagulation of different algal organic matter (AOM) fractions, especially on its non-proteinaceous fraction. It was derived from cellular organic matter of Chlorella vulgaris, a freshwater algae. Two different Al-based coagulants were employed, i.e. alum and pre-hydrolyzed polyaluminim chloride (PACl). The highest coagulation efficiency was obtained at pH around neutral (pH 7.1-7.5 for alum and pH 7.6-8.0 for PACl) at relatively high dosages of coagulant (8 and 10 mg·L-1 as Al for alum and PACl, resp.). However, the maximum removal reached under the optimized conditions was only approximately 20%. The coagulation behaviour and efficiency of non-proteinaceous matter greatly differ from AOM peptide-proteins, which is discussed in the study.

National Repository of Grey Literature : 53 records found   1 - 10nextend  jump to record:
Interested in being notified about new results for this query?
Subscribe to the RSS feed.