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Metal-complex dyes form complex compounds with metal ions. In practice, these dyes shows very good level dyeing, have better penetration properties, can cover up for the irregularities in the substrates, are more resistant to washing processes, and are more stable to light. In molecules of metal complex dyes, pigments and inks, metals are bound that pose a serious risk to the environment in wastewater from textile and leather production. Despite the fact that today most EU countries have strict limits on the content of these dyes in discharged sewage, toxic waste metals above the permitted limits are still present in waste water from the production and processing of textiles. The article deals with the possibility of using microorganisms - bacteria and microscopic fibrous fungi for removal of metal residues from textile production waste water. With the use of Atomic Absorption Spectroscopy (AAS), the higher efficiency of Pseudomonas heterotrophic bacteria was confirmed compared with Aspergillus fungi strains for the remediation of selected metals from textile waste water. [ABSTRACT FROM AUTHOR]

The diversity of sites with a high proportion of metals is characterized by the occurrence of specifically adapted microorganisms. Their identification and subsequent accurate genotypic and phenotypic characteristics are a prerequisite for further practical applications, especially in bioremediation processes. The article deals with evaluation of biochemical features for fenotypic identification of bacterial microorganisms. 30 new isolates of gram-positive microorganisms of genus Arthrobacter, Bacillus, Brevibacterium and Paenibacillus from the sludge lagoon after extraction and treatment of polymetallic ores showed variable biochemical features (arbutin, α-cyclodextrin and β-cyclodextrin, m-inositol, salicin, uridine) that make identification of these isolates more difficult due to their phenotypic characteristics using a BiologTM MicroStation system. The results of the study are related to the unstable genomic regions, especially with the verification of the presence of metal resistance genes in operons of isolated bacterial microorganisms. [ABSTRACT FROM AUTHOR]