THE INFLUENCE OF THE ANTHROPIC FACTOR ON THE WATER QUALITY OF THE BISTRITA RIVER
Journal Title: EcoTerra (Journal of Environmental Research and Protection) - Year 2009, Vol 21, Issue 21
Abstract
Rivers and lakes are drinking water supply sources for many human comunities. Unfortunately, these natural water reservoires are frequently submit to pollution. Water quality monitoring activity is focused on water resources’s quality depending on the values witch express this stage, hence the importance of water monitoring. The influence of Bistriţa wastewater treatment plant on water’s quality in section Sărata downstream also indicated the efficiency of biological treatment with activated sludge. Activated sludge is a commonly used biological treatment process that is performed by a variable and mixed community of microorganisms, in which bacteria constitute the majority. This study proved that Bistriţa wastewater treatment plant improvements are insufficient to maintain Bistriţa river quality. In the absence of the third step of wastewater treatment which involves nitrification/denitrification and phosphorus removal, it is required the parallel monitoring of the nitrifying and denitrifying bacteria at Bistriţa wastewater treatment plant for the capacity of NH4+, NO2- and NO3- removal from the treated water. The levels of ammonia and nitrates in section Sărata downstream indicated that activated sludge process is inefficient. In favourable climate conditions these nutrients will cause eutrophisation which has a negative impact on quality state of water, menacing the normal progress of trophic chain processes in river.
Authors and Affiliations
Viorel MÂNDRUŢ
Keywords
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