|
|
Monitoring of selected parameters in the wastewater treatment process in the various WWTP
Dalajková, Nikola ; Zlámalová Gargošová, Helena (referee) ; Repková, Martina (advisor)
This work is focused on wastewater treatment, specifically the WWTP Brno Modřice. Described herein are the general technological parameters of large and medium-sized wastewater treatment plants and wastewater treatment process in the WWTP Brno Modřice. The greatest emphasis is on biological phase of waste water treatment. Purification employs chemical, biological and physical cleaning processes. To determine the effectivness of the treatment plants various indicators are used such as COD, BOD, Ntotal and Ptotal whose the maximum permissible values are established in accordance to norm. The basis of biological treatment is the activated sludge containing microorganisms, by which the effectiveness of the cleaning process is determined. These microorganisms are determined qualitatively and quantitatively. To compare the efficiency measurements of activated sludge were also made at two other wastewater treatment plants. These values were then compared in the experimental part of the work.
|
|
|
Application of membrane technologies for the production of drinking water from the effluent from the WWTP
Minich, Marek ; Mergl, Václav (referee) ; Repková, Martina (advisor)
The Master’s Thesis deals with the application of membrane technologies in the production of drinking water from the effluent of a municipal wastewater treatment plant (WWTP). There were two types of pressure-driven membrane processes selected – ultrafiltration and reverse osmosis, to achieve water production of the required quality. For the needs of the diploma thesis, an already existing pilot-scale membrane unit of the ASIO TECH Company l.t.d. was used. There were 44 physical, chemical and microbiological parameters observed to assess the quality of the produced water and also the input water (effluent from the WWTP). None of the afore mentioned parameters exceeded the limit values, more specifically the highest limit values issued by the Decree 70/2018 Coll. However, the produced water cannot be considered as drinking water because of its low mineralisation. Before its potential application in practise, it is therefore necessary to choose an appropriate method of remineralisation as well as to follow all the other legislative requirements for the drinking water, which have already been out of the scope within the Master’s Thesis.
|
|
|
Evaluation of concentrate from pressure-driven membrane processes
Vejlupek, Petr ; Komendová, Renata (referee) ; Repková, Martina (advisor)
This bachelor thesis deals with the concentrate from the municipal wastewater treatment plant (MWTTP) and its disposal in the legislative power of the Czech Republic. The concentrate was sampled from UF-RO system. Common parameters such as chemical oxygen demand (COD), biochemical oxygen demand (BOD), dissolved and undissolved solids, nitrate anions, nitrite anions, ammonium cations and chloride anions were determined. In the RO concentrate COD were determined from 16 mg/l to 33 mg/l, BOD5 were determined from 5,04 mg/l to 5,43 mg/l, concentration of dissolved solids were in the range of 1,19 g/l – 1,61 g/l, concentration of undissolved solids were in the range of 5 mg/l – 17 mg/l, concentration of ammonium cations were in the range of 0,24 mg/l – 2,56 mg/l, concentration of nitrite anions were in range of 0,15 mg/l – 6,50 mg/l, concentration of nitrate anions were in the range of 50 mg/l – 175 mg/l and concentration of chloride anions were in the range of 100 mg/l to 300 mg/l. It was determined that the RO concentrate exceed limits set by Czech Republic Government Decree No. 445/2021 Coll. [1] cannot be discharged into surface waters. Also it cannot be discharged into groundwater because of RO concentrate composition.
|
|
|
Removal of selected organic pollutants from water using advanced oxidation processes
Dalajková, Nikola ; Vávrová, Milada (referee) ; Repková, Martina (advisor)
The aim of this diploma thesis is the determination of selected organic pollutants with a focus on artificial sweeteners in waste water from wastewater treatment plant (WWTP) Modřice and the subsequent degradation of the thus obtained concentrations in model water using advanced oxidation processes (AOP). Two sweeteners were determined, namely sucralose and saccharin found in waste water. Synthetic sweeteners are not sufficiently cleaned in the WWTP and penetrate the environment. Effective processes for removing organic substances, including alternative sweeteners, are AOP processes. These processes are based on reactions of highly reactive hydroxyl radical (OH·), which is produced by many chemical reactions. Generally, they use ozone (O3) and hydrogen peroxide (H2O2). On sampling, wastewater samples were treated with Solid Phase Extraction (SPE) and then evaluated by HPLC/MS (High Performance Liquid Chromatography). In observing the degradation of selected sweeteners, three AOP methods were used: O3/UV, H2O2/UV and O3/H2O2. For each of these methods, the efficiency of degradation of sucralose and saccharin was investigated. From the evaluated data it was found that the most efficient AOP process for removing artificial sweeteners from water is the O3/H2O2 method.
|
|
|
Development and testing of a laboratory unit of membrane distillation
Plachý, Petr ; Repková, Martina (referee) ; Kučerík, Jiří (advisor)
This thesis describes the development and testing of a membrane distillation laboratory unit based on microporous membranes made of polypropylene hollow fibers. For this purpose, a membrane module has been developed that allows easy and fast exchange of membrane bundles. Theoretically, this module enables direct (DCMD), air gap (AGMD), sweeping gas (SGMD) and vacuum (VMD) membrane distillation. The module was used in a laboratory unit that has been designed for testing of the membrane distillation process. This unit has been succesfully used for water distillation. In this work the influence of several operating parameters on distillate production in VMD and SGMD modes has been tested. In addition, the combined effect of feed temperature and flow and module pressure on distillate production has been described.
|
|
| |
|
|
Study of pesticide degradation using advanced oxidation processes
Vlach, Tomáš ; Repková, Martina (referee) ; Mravcová, Ludmila (advisor)
In the master’s thesis are expleined and described proceses and terms related by problematic degradation of pesticides using advenced oxidation proceses and their possibilities of determinations. The essence of the experimental work was development and validate created method for determination of chosen pesticides. Degradation of this pesticides by advenced oxidation proceses and their determination after degradation. The aim of the work was compare chosen oxidation methods and summary of results for designe of the most appropriate method.
|
|
| |
|
|
Use of Advanced Oxidation Processes to remove selected pollutants from the water matrix
Minich, Marek ; Landová, Pavlína (referee) ; Repková, Martina (advisor)
This bachelor’s thesis deals with the topic of using Advanced Oxidation Processes (AOP) to remove selected pollutants from the water matrix via food dye Brilliant Blue E133 removal. For the AOPs reactions systems 3 types were chosen: UV/H2O2, UV/TiO2 and UV/H2O2/TiO2 system. Although the AOP reactor prototype has been constructed only for the TiO2 system, there has been proven efficiency for the two remaining systems. All three of these systems exhibited dye degradation level from 63,29 ± 9,97 % for UV/TiO2 system to 77,06 ± 2,23 % for UV/H2O2 system in 240 minutes long experiments. This thesis offers complex and up to date view regarding AOP issue in wider context and demonstrates its usefulness in half controlled conditions.
|
|
|
Operation and optimization of a capacitive deionization unit
Vespalec, Jan ; Mergl, Václav (referee) ; Repková, Martina (advisor)
This bachelor thesis is focused on the extension of the information available so far on capacitive deionization within the framework of research activities in the field of separation methods. In the theoretical part, the laws of deionization, factors influencing the course of deionization, possible configurations of the capacitive deionization model, electrode corrosion issues, practical applications and future developments of capacitive deionization are discussed. The experimental part describes the capacitive deionization unit located at the FCH BUT, the procedure of electrode replacement, calibration of pH and conductivity probes and the optimal setting of factors influencing the course of deionization. In this bachelor thesis, a series of measurements were carried out to find the optimal setting of the unit.
|
guest ::
RSS feed.