First section of this master thesis is background research of energy demand of sewer systems. Intrudoctory chapter explains basic concepts. Second chapter is dealing with Czech and European legislation concerning energy consumption of water service. Third chapter describes energy demand of sewer systems. In this chapter there are described conventional gravity, vakuum and pressure sewer systems and components with major power consumption. Fourth chapter describes actual state of energy demand of WWTP and possible ways of improving power consumption of WWTP. Second section is a review of energy consumtion of vacuum systems of five different municipalities including one WWTP. Measured and evaluated outputs were used to create energy audit methodology for sewer systems.

This diploma thesis deals with the wastewater treatment technologies by means of which high quality of the treated wastewater is attained, especially with regard to removing nutrients. The introduction of the thesis contains, among others, descriptions of the reserves in the Czech Republic where it is extremely important to insist on the highest quality of the discharged wastewaters. Then follows a summary of the quality requirements on the discharged wastewaters as stipulated in the legislation. Furthermore, I analyse the impact of the nutrients – nitrogen and phosphorus – on the environment and the principles of their removal from the wastewaters. In the next section I concentrate on the technological processes by means of which the required quality of the wastewater is achieved. The conclusion includes a list of technologies used as the tertiary wastewater treatments with emphasis on membrane technologies. The second part of my thesis is a study of a project of a wastewater treatment plant (WWTP) with membrane technology for the villages of Sloup and Šošůvka located within the protected landscape area of Moravian Karst.

The research part of the diploma thesis is focused on an issue of energy consumption in sludge treatment at wastewater treatment plants divided by the number of population equivalent. The aim of the practical part is to set indicators and propose evaluative criteria concerning energy performance of urban wastewater treatment plants. The verification of proposed criteria and energetic analysis result from data of the wastewater treatment plant in Novy Jicin.

This work deals with factual building, which is a sewerage in the town of Rokytnice nad Rokytnou. The aim of this work is to propose measures to reduce inflow of redundant water to the local wastewater treatment plant. A method chosen to achieve it is an assesment the most problematic location and making a plan. This work includes among other outputs from the primary exploration and a condition survey, hydrological analysis and designing of two measures. These designs are complemented by the calculation of investment costs and their comparison. Appendix to this work contains drawings and the sheets from condition survey.

The reduction in energy consumption is nowadays of increasing importance also within the field of waste water treatment. In combination with increasing requirements for the WWTP (waste water treatment plant) outlet quality, the energy optimization becomes very challenging for the plants operators. This thesis presents possible approaches to the energy optimization and summarizes technologies and measures, where some of them are in the research phase while others are already implemented successfully. In particular, the contribution of the activation tanks aeration process to the overall energy consumption of a plant is highlighted. A change in the aeration control is tested using a mathematical model of WWTP in Mikulov, South Moravia in Czech Republic. In the new setting the aeration is regulated based on the concentration of nitrogen compounds in the activation tank. There is also a brief survey of the energy consumption of the plant and an outline of other possible energy conservation measures.

This thesis deals with the optimization of sewer heat recovery. For proper design and optimization it is necessary to use three basic methods: diagnostics, heat balance calculations and modeling. In 2D software Area Calculation are simulated different types of sewer exchangers arranged in sewer pipes. Using models of software CalA and simulations will be selected optimal variant. Using software BSim, which is based on more zone numerical simulation of the energy needs of buildings in relation to indoor climate, are detected heat needs of an office building. The optimal number of sewer exchanger is designed from the identified performance heat exchangers and supplies heat for the building.

The diploma thesis deals with the assessment of the existing condition of the sewerage system and the proposal of measures for disposal of sewage in the village Prasklice. Submits a proposal for three options for improving the condition of the drainage and resolve the disposal of sewage. Option 1. consists in the design of new separate system and reconstruction of existing stormwater, the original combined system. To this option, including the proposal of the central sewage treatment plant. Option 2. includes the design of the pumping station for the diversion of sewage effluent to wastewater treatment plant that is proposed in the next village Pačlavice. Option 3. describes the reconstruction of the existing combined system and design of the central sewage treatment plant. The individual proposed technological solutions to the drainage and treatment of waste, is created overview of the economic performance. The object is to determine what the least economically demanding variant and show how subsidies can be used. Economically least demanding option was evaluated option 3. From an operational point of view it is most advantageous to variant 1., which will prevent future operating costs. The diploma thesis brings the village Prasklice a convenient solution for sewerage and sewage disposal in the village.

The thesis deals with the annual assessment of trial operation of the wastewater treatment plant in Dolní Věstonice. Th e theoretical part focuses on ways wastewater services for municipalities sizes 2001 - 10 000 EO. The following are the most frequently observed indicators which are reported in the current legislation. The practical part is focused on describing the wastewater treatment plant and to assess its condition at the time of trial operation. Calculated parameters of volume and hydraulic loads are then compared with the original proposal in the project documentation. The values of substance loads are compared with current legislation on implementation of runoff. Below are caused failures and problems in the prior operation. A conclusion is determined by energy class watched cleaners in terms of energy consumption.

Antibiotics are one of the greatest discoveries in medicine, and emerged resistances have become a global threat. It is theorized that a big part of the antibiotic resistance genes come from the environment, and wastewater treatment plants and hospitals are considered a great breeding ground for the spread of these. The aim of this project is to analyse the microbiome and resistome of the wastewater of Uppsala and to evaluate the efficiency in the elimination of antibiotic resistance genes and bacteria. Samples from the University Hospital and the influents, sand filter and effluent of the Wastewater Treatment Plant were collected, DNA was extracted and sequenced to be analysed through metagenomics to explore them taxonomically and looking for resistance genes. Bacteria were also isolated, and their resistances were analysed. Taxonomical differences became noticeable in Order, Family, Genus and Species, with an increase of diversity in the Effluent samples. A total of 233 resistance genes were found in all the samples. There was a clear reduction in the number of resistance genes in the Effluent samples. However, there was an important number of genes carried in these and some prevail through all the path. Within all the isolates collected, from a total of 11, three E. coli isolates, one C. freundii and one E. cloacae presented resistances. Our study shows that the effluent of the wastewater treatment plant of Uppsala is potentially causing a negative impact on the environment, flushing out water not completely free of antibiotic resistance genes and resistant bacteria.

Préserver les ressources en eau est l’une des problématiques environnementales majeures du 21è siècle. Pour faire face à cette nécessité, il est essentiel de mettre en place une surveillance réglementée de la qualité des eaux et des rejets se déversant dans le milieu aquatique et de développer de nouveaux outils d’échantillonnage. L’échantillonnage ponctuel est la technique la plus facile à mettre en œuvre. Toutefois, elle n’est pas toujours représentative d’un milieu hétérogène parfois soumis à des variabilités spatiales et temporelles importantes. L’échantillonnage passif, notamment avec l’outil POCIS (Polar Organic Chemical Integrative Sampler), est une approche complémentaire aux techniques traditionnelles, qui permet de concentrer des molécules organiques semi-polaires directement sur site. La pertinence du résultat obtenu (la concentration moyennée sur la durée d’exposition), couplée à la simplicité de sa mise en œuvre en font a priori un outil de choix pour suivre des hydrosystèmes complexes.Dans ce contexte, des familles des composés diversifiées ont été sélectionnées : pesticides, composés pharmaceutiques, hormones stéroïdiennes et composés perfluorés. Au sein de chaque famille, plusieurs composés traceurs, présents dans l’environnement, comportant des propriétés physico-chimiques variées et aux statuts règlementaires différents (Directive Cadre sur l’Eau notamment), ont été choisis.Des essais d’optimisation de design du POCIS (quantité et nature de phase réceptrice, nature de la membrane) ont été conduits, menant à la validation de la configuration classique dans le cas général. L’influence de différents paramètres environnementaux pertinents : débit, température, matrice, présence de biofilm et dispositif de déploiement a été évaluée lors de calibrations de l’outil réalisées dans des systèmes de complexité croissante : au laboratoire, sur pilote et sur site.Les différents déploiements sur site (effluent de STEP et rivière) ont permis de valider l’utilisation de cet outil de prélèvement passif dans le cadre d’un suivi environnemental. Le potentiel du POCIS a été pleinement confirmé, tant en termes de logistique que de résultats (justesse par rapport aux concentrations mesurées par des techniques classiques, intégration d’événements ponctuels, limite de quantification…). / The protection of water resources is one of the major environmental stakes of 21st century. Regulation concerning water quality and effluents is therefore definitely needed, as well as new approaches regarding water sampling. Spot sampling is the easiest strategy. However, it may not be representative of a heterogeneous matrix, with sometimes important spatial and temporal variability. Passive sampling, including POCIS (Polar Organic Chemical Integrative Sampler) is a complementary approach, which enables an on-site pre-concentration of semi-polar organic compounds. The relevance of the result (time-weighted average concentrations) and the ease to implement POCIS make it an appropriate tool to monitor complex hydrosystems.Within this work, various compound classes were selected: pesticides, pharmaceuticals, steroid hormones and perfluorinated compounds. Among each family, several tracer molecules, widely encountered in the environment, with different physic-chemical properties and regulatory status (particularly in the Water Framework Directive), were chosen.POCIS design optimization (amount and nature of sorbent, nature of membrane) was carried out, leading to the validation of the standard configuration for general purposes. The impact of different relevant environmental parameters (flow-rate, temperature, matrix, biofouling and deployment device), was assessed during calibrations of POCIS conducted in systems of increasing complexity: in the laboratory, at pilot-scale and on-site.All on-site deployments (WWTP effluent and river) enabled to validate the use of this passive sampling tool in the framework of an environmental monitoring. The potential of this tool was fully confirmed, both logistically and in terms of results (trueness compared to concentrations measured with traditional techniques, integration of punctual events, quantification limit…).