Nitrate removal in a continuous-flow stirred reactor

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...

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Bibliographic Details
Published in:Chemical and biochemical engineering quarterly 2013, Vol.27 (1), p.7
Main Author: Foglar, L
Format: Article
Language:English
Subjects:
Chemical properties
Chemical reactors
Chemical research
Identification and classification
Nitrates
Properties
Water chemistry
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Summary: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.sup.-1] in order to achieve the optimal dilution rate. During the second test set, the removal of 100 mg N[O.sub.3.sup.-]-N[L.sup.-1] from the SW with Bio-ZPs was monitored at 0.429 and 0.755 [h.sup.-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. Key words: Clinoptilolite, continuous-flow stirred reactor, denitrification, mixed bacterial culture, nitrite accumulation
ISSN:0352-9568