Evaluation of the Self-Purification in the Waters of the Micro-Dams in the Small Hydroelectric Power Plants (Hepps) Lakatnik and Svrazhen: Potential of the Bioalgorithms

Sofia University “St. Kliment Ohridski”, Departament of General and Applied Hydrobiology, Faculty of Biology, BG – 1164 Sofia, Bulgaria


Yotinov, I., S. Lincheva, L. Kenderov, I. Schneider and Y. Topalova, 2013. Evaluation of the self-purification in the waters of the micro-dams in the small hydroelectric power plants (HEPPs) Lakatnik and Svrazhen: potential of the bioalgorithms. Bulg. J. Agric. Sci., Supplement 2, 19: 135–138


Environmental management requires the solution of problems through a comprehensive and thorough examination of all levels – from biochemical analysis to bio managerial approaches. The chemical and microbiological parameters of water in depth in micro-dams Lakatnik and Svrazhen have been investigated in June and September, 2011. Linear correlations between microbiological and hydrochemical indicators have been found. They give key information about the biochemical processes underlying the self-purification. Moreover, these correlations create a highly effective indicator system. The information from this indicator device will enable the preparation of forecast bioalgorithms for the express diagnostics of risk events in the waters of the studied micro-dams in the small HEPPs Lakatnik and Svrazhen. Our results show that these small dams provide excellent conditions for the implementation of self-purification processes in the water because of slow speed of the water in these reservoirs. The dams can be considered as natural treatment reactors where the microbial communities, operating in different layers of water, play a key role.

Key words: bioalgorithms, correlations, self-purification, waters
Abbreviations: AeH – aerobic heterotrophic bacteria, COD – chemical oxygen demand, DSS – Dissolved Suspended Soils, Endo – endo-bacteria, HEPP – hydro electric power plant, TSS – total suspended soils, USS – Unsoluble Suspended Soils

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