Efficiency of Various Ornamental Aquatic Plants for Frog Farming Effluent Treatment

Abstract

Studied on wastes removal from frog-farm wastewater by using various ornamental aquatic plants i.e. Hydrilla (Hydrilla verticillata), Green Cabomba (Cabomba caroliniana), Blyxa (Blyxa echinosperma) and Wisteria (Hygrophila difformis) for 15 days, a part of aquatic animal waste water treatment, the aim of study was also focus on the utilize waste water for the cultivation of economically ornamental aquatic plants. Initial concentration of ammonia, nitrite, nitrate and orthophosphate were 23.06, 0.01,11.76 and 1.05 mg/L respectively. Ammonia and nitrate removal efficiency in Green Cabomba were 100.00±0.00%and 54.79±13.57% within 6 days and showed a higher removal efficiency than other treatments (p<0.05). Whereas, the highest nitrite removal efficiency (26.95±5.01%) was found in Blyxa on day-6. Orthophosphate removal efficiency of Hydrilla, Green Cabomba and Wisteria on day-9 were 66.12±10.33 %, 53.51±4.77 % and 42.05±6.16 % respectively. At the end of the experiment, Blyxa cannot survive within 15 days of the experimental period, the final biomass of Green Cabomba and Wisteria lower than the initial value, but Hydrilla increased biomass during all experimental period.
In conclusion, Green Cabomba had a high potential for application as plant phytoremediation in frog farm effluent treatment systems. But, reductions of plant growth are observed over a longer period of the experiment.