The use of bacteria attached to Lewatit M600 for denitrification of the Cetina surface water (CROSBI ID 160635)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Foglar, Lucija ; Babić, Ana-Marija ; Šiljeg, Mario
engleski
The use of bacteria attached to Lewatit M600 for denitrification of the Cetina surface water
The selected mixed bacterial culture was attached to the nitrate selective ion exchange resin - Lewatit M600 (NSI) and used for investigation of nitrate removal from the surface Cetina water (SCW). The investigated system enables bonding of nitrate ions and simultaneously, the degradation of bonded nitrate. The nitrate adsorption on NSI was studied and described with the Freundlich isotherm. With the use of bacterial cells attached on NSI, the nitrate (50 - 200 mg NO3- N/L) was completely removed from the SCW, at a methanol to nitrate-N mass (C/N) ratio of 4.5:1, during 4-7 hours at pH = 7.2 and 25 °C under static anoxic conditions. The influence of initially present methanol on the denitrification process was investigated and the required C/N ratio of 2.5:1 was determined, although the denitrification process was faster in the presence of increased C/N ratios. The applicability of the bacteria attached to the NSI for fast and efficient nitrate removal from the surface Cetina water at different temperatures was further investigated. The denitrification rates were calculated according to the zero -order reaction model. The activation energy, EA and Arrenius factor, Ar for denitrification were 11.40 kJ/mol and 1790.05 mg NO3-N/Lh, respectively.
bacteria ; immobilization ; ion exchanger ; nitrate ; nitrite ; denitrification
nije evidentirano
nije evidentirano
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nije evidentirano
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Podaci o izdanju
6 (2)
2010.
113-122
objavljeno
1790-5079
2224-3496