Mieczysław Błaszczyk

Removal of nitrates from ground water by a hybrid process of biological denitrification and microfiltration membrane

Abstract Removal of nitrates from ground water in a hybrid process of biological denitrification and microfiltration is discussed. The most favourable parameters for a culture of denitrifying bacteria with respect to organic carbon/nitrate nitrogen (C/N) ratio and nitrate loading have been determined. A capillary module was selected on the basis of the amount of biomass retained during microfiltration. The optimum operational parameters of microfiltration on the selected membrane module were determined. The installation used for denitrification consisted of a bioreactor and a membrane module made of capillary fibres. This was fed continuously for several months with a fluid medium containing organic carbon (methanol), nitrates and biogenic elements.

Removal of nitrate ions from natural water using a membrane bioreactor

The research aimed at determining effectiveness of nitrates removal from natural ground water in a membrane bioreactor (MBR) with capillary polymer membranes. The paper presents an influence of nitrate loading on denitrification in an anaerobic packed-bed reactor, a sanitary and epidemiological analysis in a culture apparatus and effectiveness in removal of microorganisms from a post-culture effluent during microfiltration. The installation used for denitrification, which contained a bioreactor and membrane module made of capillary fibers, was fed continuously for several months with natural ground water enriched with organic carbon (methanol).