Nitrate Removal from Wastewater through Biological Denitrification with OGA 24 in a Batch Reactor

Water

Federico Rossi¹  Oriana Motta²  Simona Matrella¹  Antonio Proto¹  Giovanni Vigliotta¹ 

[1] Department of Chemistry and Biology, University of Salerno, via Giovanni Paolo II 132, Fisciano (SA) 84084, Italy; E-Mails:;Department of Human, Philosophical and Educational Science, University of Salerno, via Giovanni Paolo II 132, Fisciano (SA) 84084, Italy

关键词: bacterial denitrification;    Azospira sp. OGA 24;    wastewater treatment plants;    CSTR;   

DOI  :  10.3390/w7010051

来源: mdpi

【 摘 要 】

Nitrates pollution of waters is a worldwide problem and its remediation is a big challenge from the technical and the scientific point of view. One of the most used and promising cleaning techniques is the biological treatment of wastewaters operated by denitrifying bacteria. In this paper we begin a thorough study of denitrifying performances of the bacterium Azospira sp. OGA 24, recently isolated from the highly polluted Sarno river in the south of Italy. Here, the kinetics of nitrates consumption operated by bacteria in a specifically devised batch bioreactor, in anoxic condition and with acetate as the organic substrate, has been characterized. Experimental data were then used in a simplified model of a real wastewater treatment plant to find that OGA 24 can clean water with efficiency up to 90%. The denitrifying performances of OGA 24 match the requirements of Italian laws and make the bacterium suitable for its employment in treatment plants.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.