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The effect of soluble fluorine species in different concentrations on the catabolic activity of Desulfotomaculum ruminis bacteria has been studied. The fluoride concentrations tolerated by and toxic to the bacteria have been determined. The degree of fluorine species toxicity was found to depend on the form in which fluorine is introduced into the medium and increases in the following order: NaF
The effect of glutaraldehyde (GA) in different concentrations on microbiological activities of Bacillus licheniformis, Desulfotomaculum ruminis and Thiobacillus ferrooxidans bacteria used in the processes of denitrification, desulfurication and iron (II) oxidation, respectively, has been tested. For the sake of comparison, the effect of formaldehyde (FA) on the activities of the same organisms in...
The effect of sodium dodecylsulphate (SDS), sodium alkilbenzenesulphonate (ABSNa) and sulphosuccinates IOP5 and N5, present in different concentrations, on the kinetics of desulfurication conducted with the use of Desulfotomaculum ruminis bacteria was analysed. As follows from the determined activity of the microorganisms, the presence of SDS and ABSNa inhibits the process of desulfurication. The...
The effect of oxidising microbiocides (DCDMH and BCDMH) on the activity of bacteria in the processes of denitrification (Bacillus licheniformis) and desulfurication (Desulfotomaculum ruminis) is studied. Desulfotomaculum ruminis bacteria have been found more resistant than the Bacillus licheniformis bacteria to the inhibiting effect of active halogen released from the studied halogenodimethylhydantoines...
The effect of concentration of N,N-Bis(3-aminepropyl)dodecylamine (APDA) used in disinfectants (Lonzabac) on the kinetics of denitrification and desulfurication processes proceeding with the use of Bacillus licheniformis and Desulfotomaculum ruminis bacteria, was studied. The kinetic equation for denitrification in a medium containing the microbiocide tested was derived, the parameters of the process...
The subject of study was the effect of trichloroisocyanuric acid (TCICA) and sodium salt of dichloroisocyanuric acid (NaDCIC) - the compounds used as disinfectant, on the kinetic of denitrification and desulfurication run with the use of bacteria from the Bacillus and Desulfatomaculum genera. The inhibitory effect of the compounds tested on microbiological activity of the bacteria was evidenced and...
These studies concern the effect of the concentration of MMPP (magnesium monoperoxyphtalate), a compound used (among others) in hygiene products (Lonzabac-MP) on the kinetics of microbiological processes involving the following species of bacteria: Bacillus licheniformis (denitrification), Desulfotomaculum ruminis (desulfurication) and Thiobacillus ferrooxidans (oxidation of iron II ions and reduced...
The influence of didecyldimethylammonium chloride (DDDM) on the processes of denitrification - occurring with a contribution of Bacillus licheniformis bacteria, and desulfurication - with a contribution of Desulfotomaculum ruminis bacteria, was studied. It has been shown in laboratory conditions that the compound tested is not assimilable by the cultures of the above mentioned heterotrophic bacteria...
The effect of heavy metal ions (both biogenic Mn2+, Ni2+, Zn1+ and abiogenic Hg2+, Pb2+, Cd2+) on the growth of Bacillus licheniformis bacteria, and the kinetics of denitrification were studied. Rate constants and induction times of denitrification taking place in the media containing metal ions at different concentrations were determined. The order of toxicity of the metals and their maximum tolerable...
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