February 15-18, 2009 Washington State Convention Center Seattle ...

30
STUDY OF CAPABILITY OF BIVALVE Anodonta cygnea IN ORGANIC COMPOUNDS OF
WATER INDIRECT REMOVAL
Lalik Sarikhani, Arash Javanshir, Masoud Ounagh and Abdoolah Haghpanah
Grad.Student of Fishery
Faculty of Natural Resources
University of Tehran
In this study, filtration rate of water born- Nitrogen and phosphorus was evaluated in C.fluminea. This system has made of one
main tank (capacity of 100 liter) and four tanks (capacity of 2/5 liter) for standing of clams (one of them as control) and one tank
for returning of water. In this research, three different treatments of Nitrogen (80, 100 and 200 ppm) and Phosphorus (20, 40 and
60 ppm) were separately examined. Three times sampled at all treatments . Our observations showed that filtration rates of pollutant
material from the beginning of experiments were decreased at tree treatments and also filtration rates of clams increased
by increasing of Nitrogen concentrations so that filtration rates have reached from 6/53 in low treatment to 7/15 in medium
treatment and 8/07 ml.min -1 .gr -1 (AFDW) in high treatment. Filtration rates of Phosphorus were also increased as filtration rates
have reached from 5/61 in low treatment to 6/5 in medium treatment and 7/58 ml.min -1 .gr -1 (AFDW) in high treatment. Comparison
between filtration rate of Nitrogen and Phosphorus showed that clam’s efficiency in absorbing of Nitrogen compounds
is more than Phosphorus compositions.