Wastewater treatment is a worldwide problem humanity has been facing for thousands of years. Modern technologies of wastewater treatment are being used from the end of the 19th century onwards. Legislation on wastewater treatment in Europe is both at European and national level, and each of the European Union members has different laws and regulations governing this area.
Membrane bioreactors are just one of the many ways for wastewater treatment and the water purified in this way is usually very good quality. Membrane technology has undergone remarkable development over the past few decades and the price of the membranes has declined dramatically due to the development of manufacturing technology, making it more accessible for use in the wider field. The master's thesis presents the field of wastewater treatment and focuses on membrane technology. Membrane technology, types of membranes and important parameters in wastewater treatment with membrane bioreactor are being described in thesis. Within the scope of the thesis, a small purification plant with an MBR technology is constructed. A small MBR treatment plant is located in a small business facility with 10 employees. Using a pilot membrane small wastewater treatment plant, black waste water is treated. Dimensioning, composition and operation of the plant are described in thesis. The main problem in membrane technology – membrane fouling is also described. The operation of the pilot wastewater treatment plant with membrane bioreactor is analysed based on the cleaning efficiency and the value of the measured purified water parameters with border parameters given in the Slovenian regulation “Uredbi o odvajanju in čiščenju komunalne odpadne vode” and on some other parameters that are not limited in regulation. Values of the measured parameters are within permissible limits and the pilot wastewater treatment MBR plant meets the criteria. The shortcomings of the pilot MBR are also identified and possible improvements and solutions are proposed to achieve better results.