Due to the expansion of highways and expressways, there is a need to provide sanitary facilities for travelers. They can be located on so called Motor Rest Areas (MRA) equipped with parking spaces. The use of sanitary facilities is connected with the need of generated wastewater purification. One of the solution for MRA wastewater treatment is the use of local sewage treatment facilities when connection to the sewerage is not possible. Sewage from Motor Rest Areas cannot be treated as domestic wastewater because of their characteristics. The aim of this study was to assess the possibility of treatment of sewage generated on MRA with the use of traditional local wastewater treatment plant based on mechanical and biological treatment. Wastewater samples analyzed in this study were taken from 4 MRAs located on the expressway. The COD/BOD5 ratio higher than 1.8 might indicate lack of easily accessible organic matter and can negatively affect biological sewage treatment. Concentrations of total nitrogen (TN) and ammonium nitrogen presents very high ratio of N-NH4 to TN. The total nitrogen and phosphorus removal efficiency is very low. High ammonium concentrations in sewage strongly affects possibility of their biological treatment causing an increase in the alkalinity of wastewater and thus - disinfecting effect on microorganisms in the active sludge. Presented results of research conducted on MRAs shows that traditional local wastewater treatment plant does not provide a sufficient level of purification. The solution to this problem may be to separate the stream of urine. Purification of wastewater with high ammonium concentration is still a unsolved problem and requires the search for new solutions.

https://zoom.us/j/99261302467?pwd=TTBVbTUxaUdHSzNuQlFuOVF2NDVZUT09