The removal of organic dyes from industrial wastewater remains a problem, both technically and

economically. In this study, Yarrowia lipolytica yeast cells were isolated from poultry meat and immobilized using

alginate. The immobilized Yarrowia lipolytica yeast was used as biosorbent to remove methylene blue (MB) dye

from synthetic effl uent water. The results show that maximum adsorption capacity under optimum conditions was

66.67 mg∙g-1. The equilibrium adsorption data fi tted well onto the Freundlich adsorption isotherms with R2

>0.99.

Adsorption kinetics was of pseudo-second order process suggesting that the adsorption was a chemisorption. FTIR

spectra identifi ed typical absorption bands of a biosorbent. Sorption of MB dye on Yarrowia lipolytica yeast cells

was exothermic with weak sorption interaction.

The paper presents the results of laboratory tests concerning the possibility of utilizing activated carbons produced in Poland, as well as of non-conventional adsorbents, such as modified Clarion clay and clinoptylolite, for removing methylene blue from water. The objective of tests carried out was a quantitative formulation of the adsorption process, as well as the determination of the effects of various factors on its course. The attempt was taken to solve the tasks defined in the objective of the study using model experimental systems. The methylene blue solution in concentration 20 mg/dm', prepared on the basis of distilled water, was used as adsorbate. Adsorption processes, conducted in batch mode (in no-flow conditions), were best described by the Freundlich isotherms. On the basis of the isotherms the adsorptive capacity of tested adsorbents was calculated. The throughflow conditions were realized by a columnar filtration method. On the basis of obtained results the breakthrough curves (isoplanes) were plotted. The adsorptive capacities, determined on the basis of isoplanes reached 27--41 mg/g, 14.89 mg/g and 5.54 mg/g for activated carbons, modified Clarion clay and clinoptylolite, respectively. Exit curves (isoplanes) served for defining the mass transfer zone (the adsorption front height), a., well as for calculating the mass-exchange-zone moving rate. Despite their inferior adsorptive characteristics the modified Clarion clay and clinoptylolite may be taken into account as shielding materials in relation to activated carbons.