19.  Preliminary Ecological Risk Assessment to Aquatic Environment of Bega River Due to Presence of Nitrates in Treated Sewage Effluent

Authors: Marius Gheju, Corneliu Bogatu, Dimitrie Botau, Elena Savescu, Dalila Marsavina, Mihaela Puiulet


Abstract:

This paper presents the occurrence of nitrate ions in effluent from Timisoara sewage treatment plant and the assessment of risk it may pose to aquatic environment of Bega River. An average concentration of 13.33 mg NO3-/L was reported in Timisoara sewage treatment plant effluent. The risk assessment to aquatic environment due to presence of nitrate in treated sewage was evaluated according to the procedure laid down in European Union. Because a RQ < 1 was obtained, this indicates that nitrates ions from effluent of Timisoara sewage treatment plant do not pose any risk to the aquatic environment of Bega River.


Keywords: risk assessment, nitrate toxicity, aquatic environment, surface waters, sewage treatment

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