Constructed Wetland with Flow Water Surface Type for Elimination of Aquaculture Wastewater from Catfish (Clarias gariepinus, Var)

Abstract

The increased of aquaculture activity have a negative impact for the environment, these activities will result pollutants from aquaculture wastewater. Therefore, aquaculture wastewater must be treatment. One technology that is cheap, easy and effective in controlling aquaculture wastewater is constructed wetlands system. The constructed wetlands system combines plants and microbes activity in treating wastewater. The purpose of this study is to determine the ability of vetiver grass (Chrysopogon zizanioides, L), cyperus plant (Cyperus alternifolius) and water hyacinth (Eichhornia crassipes) at the constructed wetlands system to removing pollutants (NH3 and PO43) of Catfish (Clarias gariepinus, var) wastewater aquaculture. In this study, the constructed wetlands system used Flow Water Surface type and the plants is planted with a floating system using steyrofoam in four treatments, i.e.control (bioball without plant), vetiver grass (C. zizanioides, L), cyperus plant (C. alternifolius) and water hyacinth (E. crassipes). The results showed that the each plant have a different ability to eliminate NH3 and PO43-. Vetiver showed NH3 and PO43- removal was 2 - 66.7% and 0 - 75.4%, cyperus was 0 - 66.7% and 42.4 - 71.2% and water hyacinth was 0 - 15.8% and 33.1 - 89.7%.