L. Hably szerk.: Studia Botanica Hungarica 21. 1989 (Budapest, 1989)

Ács, Éva; Lakatos, Gyula: Preliminary algological study on biofouling in industrial water systems

- Decreasing the concentration of suspended matter (mud) in the supplemental water and thereby reduction of the nutrient supply in the cooling water systems. - Applying selective algistatic and algicide chemicals into the feed water to prevent the proliferation of algae in recycling systems. - Selection and treatment of substrates that impede the settlement and proliferation of algae and the application of such base and covering materials which, even if they do not stop the forming biofouling, significantly retard its formation. - Making the conditions unfavourable for the algae (e.g. selective discolouring, nutrient supply, etc.) and preventing the formation of scale and the corrosion processes (e.g. adding organic polyphosphate, etc.). - Using other biological protection measures (e.g. cyanophags, saprophytic fungi, etc.). SUMMARY This paper discusses the composition and possibilities of elimination of algal-fouling forming in the cooling water systems. In our opinion there is a need for chemical, bacteriological, algological and zoological analysis to reveal the condition of the biofouling formation and economic possibilities of its elimination. The samples were taken from cooling water systems of four Works (TVK, TIFO, MGM, LKM). Cluster analysis was used to compare the composition of the algal-fouling of different sampling sites. It was observed that the biofouling mainly consists of filamentous blue algae (Cyanophyta), but most species belong to the Pennales. In the biofouling, teratological form of algae can be found more frequently than in natural water bodies, because of the disturbance. In this paper we survey possibilities of protecting measures and problems. REFERENCES BIRCHALL, G. A. (1979): Control of fouling within cooling water systems. - Effluent and Water Treatment J., 79:571-552. CHARACKLIS, W. G., TRULEAR, M. G., BRIERS, J. D. and ZELVER, N. (1982): Dinamycs of biofilm processes: methods. - Water Res., /0:1-10. KIRPATRICK, J., MCINTIRE, L. V. and CHARACKLIS, W. G. (1980): Mass and heat transfer in a circular tube with biofouling. - Water Res., /4:117-127. LAKATOS, Gy., SZABÓ, J. and BALOGH, T. (1979): Vizsgálatok ipari hűtővíz-rendszerek hatásfokát csökkentő élőbevonat (biotekton) eliminálására (TVM, Szolnok). (Removal of biological encrustation [biotecton] impairing the efficiency of industrial cooling systems) [Tisza Chemical Industries, Szolnok]). - Vízminőségi és Víztechnológiai Konferencia, MHT, Budapest, 2a: 1-23. LAKATOS, Gy. and PAPP, L. (1982): Ipari hűtővízrendszer bevonata és annak eltávolítási lehetőségei (TVM). [Biofouling structure of the industrial cooling systems and the possibilities for its elimination (Tisza Chemical Industries).] - III. Országos Vándorgyűlés, MHT, Debrecen, J//:233-242.