The Assessment Of Swan - Arash - Iran
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INTERNATIONAL SEMINAR ON WETLANDS AND SUSTAINABILITY 2007
THE ASSESSMENT OF SWAN MUSSEL ANODONTA CYGNEA (UNIONIDAE), ZEBRA MUSSEL DREISSENA POLYMORPHA AND MUD SNAIL LIMNEA SPP. COMBINED CHLORELLA SP. AND SCENEDESMUS SP. CAPABILITIES IN DISSOLVED PHOSPHATE AND NITRATE RETENTION IN URBAN WASTE WATER (A CLOSED SYSTEM APPROACH) Arash Javanshir, Afshin Danekar and Gholamreza Rafii Natural Sciences Faculty Fisheries and Environment Department University of Tehran [email protected]
Abstract In order to demonstrate reduction of this dissolved party in urban waste water by a biological issue and utilization of swan mussel Anodonta cygnea, Zebra mussel, Dreissena Polymorpha and the mud snail Limnea sp , in reduction of Nitrate & phosphate in urban wastewater, individuals, were placed in a closed system at 1920ยบ C. Their filtration rate (ml.min-1.g-1 (Ash Free Dry Weight (AFDW)) and retention of dissolved phosphate and nitrate salts was measured. Estimation of water volume processed through gills was calculated with the help of dixenic culture of chlorella sp. and Scenedesmus sp. Algae developed in Guillard and Rhyter (1962) media. The algae population was used when its concentration arrived to about 400.103 cells. ml1
.
Our results showed that fresh algae is capable to remove an important part of dissolved materials as it develops in order to subvention its vital needs. Also there was a positive correlation between weight (AFDW) and specific filtration rates of mussels. Furthermore results showed that increase of pollutants concentrations caused an increase of specific filtration rate by mussels. Considering to our results we can take account on Anodonta cygnea as a natural water purification agent in urban waste waters treatment. This work allows thinking about this agent in other in situ applicable experiments.
Key words: Waste Water Treatment, Filtration Rate, Anodonta Cygnea, Phosphate And Nitrate Removal, Chlorella Sp., Scenedesmus Sp.
THE ASSESSMENT OF SWAN MUSSEL ANODONTA CYGNEA (UNIONIDAE), ZEBRA MUSSEL DREISSENA POLYMORPHA AND MUD SNAIL LIMNEA SPP. COMBINED CHLORELLA SP. AND SCENEDESMUS SP. CAPABILITIES IN DISSOLVED PHOSPHATE AND NITRATE RETENTION IN URBAN WASTE WATER (A CLOSED SYSTEM APPROACH) Arash Javanshir, Afshin Danekar and Gholamreza Rafii Natural Sciences Faculty Fisheries and Environment Department University of Tehran [email protected]
Abstract In order to demonstrate reduction of this dissolved party in urban waste water by a biological issue and utilization of swan mussel Anodonta cygnea, Zebra mussel, Dreissena Polymorpha and the mud snail Limnea sp , in reduction of Nitrate & phosphate in urban wastewater, individuals, were placed in a closed system at 1920ยบ C. Their filtration rate (ml.min-1.g-1 (Ash Free Dry Weight (AFDW)) and retention of dissolved phosphate and nitrate salts was measured. Estimation of water volume processed through gills was calculated with the help of dixenic culture of chlorella sp. and Scenedesmus sp. Algae developed in Guillard and Rhyter (1962) media. The algae population was used when its concentration arrived to about 400.103 cells. ml1
.
Our results showed that fresh algae is capable to remove an important part of dissolved materials as it develops in order to subvention its vital needs. Also there was a positive correlation between weight (AFDW) and specific filtration rates of mussels. Furthermore results showed that increase of pollutants concentrations caused an increase of specific filtration rate by mussels. Considering to our results we can take account on Anodonta cygnea as a natural water purification agent in urban waste waters treatment. This work allows thinking about this agent in other in situ applicable experiments.
Key words: Waste Water Treatment, Filtration Rate, Anodonta Cygnea, Phosphate And Nitrate Removal, Chlorella Sp., Scenedesmus Sp.
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