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1

Application of biological processes in manganese elimination from ground water

100%
Olnczuk-Neyman K., Prejzner J.
Biotechnologia
|
1994
|
issue 4
154-163
EN
The role of microorganisms in manganese oxidation and reduction precessing taking part in ground water enviroment is presented.Manganese oxidation catalysed by bacteria takes place in presence of dissolved oxygen, at relatively high Eh conditions about 600 mV and pH 6,5-7 and this process proceeds more rapidly than any non-biological reaction.Chemical oxidation of manganese could be achieved only by raising the pH to 8,5 0r over.Manganese (IV) is reduced already at the Eh value +300 nV and pH values between 6 and 7.The reduction process can be catalysed by bacterial enzymatic systems and coupled with oxidtion of organic matter or indirectly by bacterial metabolites.Occurrence of manganese oxidizing bacteria in ground waters as well as effect of environmantal factors on manganese removal by slow sand filtration is described
2

Anaerobic digestion of municipal wastewater with biocatlytic addition

81%
Olanczuk-Neyman K., Prejzner J., Czerwionka K., Bray R.
Biotechnologia
|
1995
|
issue 1
176-191
EN
The results of laboratory and field investigations concerning the influence of biocatalytic additions on anaerobic digestion of wastewater in septic tanks are presented.Commercially prepared bacterial cultures (Bio-7, Digest) and mixtures of bacterial cultures with enzymes (Bioenzyclar, Enzybac) were applied.It was concluded that biocatlytic additions to septic tanks influenced the secondary chemical and bacteriological pollution of the mixed loquor over the primary sludge.The particular commercial biocatalysts did not improve the odour of wastewater.The effluent from septic tanks with biocatalytic additions did not meet the standards for wastewater to be drained off the soil or to natural waters.
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