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A number of indicatory microorganisms are found in clean and lightly polluted surface water in the ditch in Słupy village and in the drainage ditch in the region of Barczewo; in the Elżbieta Canal and in Wójtowo stream - for clean (TVC 37°C), lightly (TC, FC, and FS), or strongly (TVC 20°C) polluted surface water; and for inconsiderably or noticeably (TVC 20°C and TVC 37°C) and strongly (TC, FC, FS...
The influence of solid retention time on cadmium uptake by activated sludge at different concentrations of the metal was studied. Activated sludge was cultivated in a lab-scale bioreactor with plug-flow pattern. Respirometric measurements were applied to evaluate the inhibitive effects of cadmium on activated sludge. The obtained values of the conditional adsorption constant indicate a similar affnity...
The results of experimental and mathematical modelling of simultaneous carbonization, nitrification and denitriiication processes in an industrial wastewater treatment plant are presented. Simplified dynamic mathematical models based on organic and nitrogen substrates, autotrophic and heterotrophic biomass material balances for complete-mixing and tank-in-series hydraulic regimes and Monod-type kinetics...
The nature of the interaction between some strong antifungal compounds and model membranes was studied. It was found that these compounds (N-dodecyl-N,N-dimethyl-N-/3- (β-methyl-β-nitrovinyl 1-6-methoxybenzyl/ammonium chloride and its derivatives) significantly change the properties of liposomes, planar lipid bilayers (BLM) and erythrocytes. The changes observed (i.e., release of praseodymium ions...
Determination of polynuclear aromatic hydrocarbons (PAH-s) in sewage sludges is necessary before utilizing the sludges in agriculture, especially in industrial regions. Separation of PAHs has been the most difficult step of analysis. In this work, PAHs were separated by extraction. The best extraction solvents were chosen after reviewing literature. A new method of determining the partition coefficient...
The interaction of lead and calcium assimilation was examined in the soft tissues, shell and faeces of the soft tissues, shell and faeces of the garden snail an induced calcium stress, shell wounding. This is known to mobilise Ca both from the shell and soft tissues, conditions which are likely to affect Pb assimilation by each component Following wounding, snails were fed an artificial diet for 7...
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