Conclusions
Based on the results presented, the system
with lotus showed the best removal efficiency for
pollutant removal in domestic wastewater as post
treatment while the hydrilla unit was troubled with
high pH in the effluent and under suspicion with
SS removal. Hydrilla might not be suitable for
effluent polishing. However, constructed ponds
with aquatic plants could result in higher efficiency
and greater advantage than a system without plant.
Lotus and hydrilla, especially lotus, could provide
an alternative plant in aquatic plant systems.