Potential of Echinodorus Cordifolius and Vallisneria Natans in Constructed Wetlands for the Removal of Water Pollution from Shrimp Farm Effluent

Abstract

Management of shrimp aquaculture wastewater is still the major problems in fisheries. Objectives of this study are to set up laboratory-scale wetlands to evaluate the phytoremediator performance of Echinodorus Cordifolius and Vallisneria Natans in improving aquaculture wastewater as a treatment technology from the first day, 3 days, 7 days, 10 days, 14 days, 17 days and 21 days. The controlled and experimental design setup describes both constructed wetland by glass tank sizes with a circulation system. The controlled wetland dones’t have plants and an experimental wetland have plants with details as follows: Echinodorus Cordifolius had fresh weight 193.05±13.502 g, length of plant 55.5±2.081 cm, length of root 30.25 ±6.344 cm. Vallisneria Natans had fresh weight 57.58±0.05 g, length of plant 15cm, length of root 4cm. The results showed that the survival rate (SVR) of both aquatic plants in the experiment was 100% for Echinodorus Cordifolius and 16.7% for Vallisneria Natan in the 21-day experiment. Furthermore, the experimental wetland can be considered as an effective solution in reducing 95.68% of ammonium-nitrogen, 98.86% of nitrate-nitrogen, 60.02% of phosphate, 46,72% of chemical oxygen demand, 100% of iron, 97,4% of copper when compared with the concentration at the beginning of the experiment. To be concluded, the growth and development of Echinodorus Cordifolius and Vallisneria Natans in this wetland has a positive effect on reducing pollutants of shrimp aquaculture effluents in all the 21day experiment.