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The objective of study was to define the removal rate of the indicator microorganisms on various types of trickling filters with regard to the influence of: magnetic stream and electric current passage, on the effectiveness of microorganisms adsorption onto the media. The hydraulic loading in the first eight variants were changing, variants 9-14 were peformed at a constant loading. The study results...
The inhibition of 23 strains of actinomycetes by 7 strains of fluorescent pseudomonads and vice versa, on 4 different media, was examined. The antagonism of pseudomonads was more frequent and more intense than that of actinomycetes. Inhibition was observed in pseudomonads and actinomycetes of both kinds of strains, antagonistic and non-antagonistic to Fusarium oxysporum. Some media were more favorable...
Among all the technologies of water treatment, membrane technology appears to be the most promising. The major advantage of this technology is its ability to produce water with a constant and well adjusted quality. Moreover, membranes remove a wide range of substances, ranging from particles to ions, including bacteria and viruses, and they can operate without any chemical addition to raw water. The...
A modified river water die-away test is developed for controlling the biodegradability of anionic surfactants (AS) and non-ionic surfactants (NS) of detergent powders. The tested powder undergoes a procedure replicating the washing process. An aliquot of the final solution is introduced into river water exhibiting good biodegradative ability. Primary biodegradation of both types of surfactant is monitored...
Methods that permit the sensitive detection of DNA damage and repair are of special significance in the field of environmental research due to the long latent period between exposure to environmental agent(s) and genetic effect(s) becoming apparent. Malathion is a commonly used organophosphorus insecticide reported to be genotoxic both in vivo and in vitro, but the reports are conflicting. In order...
Attempts at lake restoration by artificial aeration with the use of wind energy were made on the heavily eutrophic Lake Starodworskie. The lake is small - only 7 ha surface area but deep - 23 m. Artificial aeration was performed by destratification method. Compressed air, produced with the help of a wind turbine was subsequently delivered to the deepest site in the lake. As show the study results...
The experiment was conducted in order to determine the concentration of fluorine in cow's milk and human breast milk. Milk samples were tested for fluoride concentration. After fractioning, free fluorine and protein-bound fluorine was tested by using ion-selective electrode. It was determined that the concentration of fluorine in tested human breast milk was higher than in cow's milk. The fluorine...
This paper evaluates contamination and sanitary and bacteriological states of the waters in the Czarna Hancza River in the region of Suwalki and Wigry National Park, and treated wastes coming from an urban sewage treatment plant. Microbiological examinations were carried out every month, in three annual cycles, in 1994-1996. Water samples were taken at 11 stations situated in the most characteristic...
The immunological effects of the environmental and/or occupational exposure to NO2 and NO in air as polluting gases have been examined in groups of 16 men. The determina-tion of NO2 and NO concentrations in ambient air in the work enviroment as well as in ambient air in residential areas of these men was performed, always by use of an Amaya-Sugiura passive sampling spectrophotometric method. Mean...
Eight soils were studied for adsorption reactions of zinc and evaluated for their quantity, intensity and supply parameters for zinc. With the addition of increasing amounts of zinc there was a simultaneous increase in the equilibrium concentration, adsorption, percent saturation of adsorption capacity and supply parameter of zinc. Multiple regression analysis revealed that in all soils quantity,...
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