The world is facing a growing shortage of water resources. With this problem, scientists are searching for solutions that would help us save as much water as possible and, above all, how to reuse water. One of the most effective ways to reuse water is to treat wastewater using municipal wastewater treatment plants. In my diploma thesis, I studied the efficiency of an infiltration small municipal wastewater treatment plant and the use of treated water in agriculture. The aforementioned treatment plant treats wastewater from a residential building. Then it is used for irrigating a nearby football field. In the future, that water could be used to water agricultural areas and lawns, thus contributing to water conservation at the local level. In the thesis I summarized the current state of water in the world, directives, legislation and regulation on wastewater, water reuse in agriculture and wastewater treatment worldwide, in Europe and in Slovenia. I reviewed the current parameters measured in wastewater and their limit values from a few years back and up till today. In the research part of my work, I sampled wastewater at a small infiltration municipal wastewater treatment plant. The effecting of the treatment was monitored by measurement of dissolved solids and chloride content.
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