PARENT SESSION
4H Ecological risk assessment for the marine environment
9:00 AM to 7:00 PM, Wednesday, 09 May 2001

(W/EH086) MONITORING TOXICITY IN IRO RIVER DUE TO WASTEWATER DISCHARGES.

Rodríguez, Rocío¹, Garrido, Carmen¹, Acevedo, Asuncion¹, Nebot, Enrique¹, Sales, Diego¹, ¹

ABSTRACT- River Iro is a effluent of water that pours to a pipe of seawater like Sancti-Petri. This river is being contaminated for the discharges of wastewater of the sewage treatment plant (STPs) of the population of the town of Chiclana, in the south of Spain. From the year 1998 is carrying out a study of toxicity caused by the wastewater discharges in different points of the river. Likewise, they have taken marine sediments for their analysis and for extract elutriates to study their toxicity. In this elutriates were made the same analysis of toxicity, with the purpose of comparing the results of the waters of the river and the sediments. Different technical of determination of toxicity have been compared, like the bacterias bioluminiscentes bioassay (Photobacteria phosphoreum), DIN/ EN/ ISO 11348-2. As well as unicellular algae bioassay unicellular like Dunaliella saline, Chaetoceros gracillis, Tetraselmis suecica. The results show a correlation of the toxicity mainly in the point of wastewater discharges next to the sewage treatment plants (STPs) much for the bioassay of luminescent bacterias like the unicellular algae bioassay

Key words: wastewater, algal bioassay, discharges, Photobacterium phosphoreum