Original scientific paper

Nitrate Removal in aContinuous-Flow Stirred Reactor

L. Foglar orcid.org/0000-0003-1407-381X ; Faculty of Chemical Engineering and Technology, University of Zagreb, Maruliæev trg 19, 10000 Zagreb, Croatia

Abstract

The presence of excess nitrate in natural water resources is determined worldwide and therefore the methods for reduction and prevention of water pollution are still being investigated. The main objective of the present study was the use of natural zeolite that
was interacted with bacterial cells to obtain biozeolite particles (Bio-ZPs). The resulting Bio-ZPs were applied for nitrate removal from the surface water (SW) in a continuous-flow stirred reactor. In the first set of experiments, the nitrate removal was monitored
at dilution rates (D) of 0.027, 0.043, 0.095, 0.429, and 0.755 h–1 in order to achieve the optimal dilution rate. During the second test set, the removal of 100 mg NO3–-NL–1 from the SW with Bio-ZPs was monitored at 0.429 and 0.755 h–1 during 21 days. The use of Bio-ZPs in the continuous-flow stirred reactor was demonstrated as an efficient method for nitrate removal from the SW.

Keywords

Clinoptilolite; continuous-flow stirred reactor; denitrification; mixed bacterial culture; nitrite accumulation

Hrčak ID:

99431

URI

https://hrcak.srce.hr/99431

Publication date:

29.3.2013.

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