COD AND NITROGEN REMOVAL FROM FERTILIZER WASTEWATER EFFLUENT BY USING AN ENGINEERED WETLAND

This project presents the analysis of the effectiveness of engineered wetland to tmat
the effluent from the Wastewater Treatment Plant (WWTP) of Fertilizer Plant. The Chemical
Oxygen Demand (COD) level of the fertilizer wastewater effluent is high, ranging from 89 to
200 mg/L with the average of 140 mg/L. This is higher than the specified discharge standard
oflOO mg/L.
The objective of using this wetland system is to remove nutrients as well as other
contaminants. The constructed wetland was planted with Eichhornia crassipes (floating type
of plant). The model was found to be able to remove COD to 45 mg/L after 27 days of
treatment (meet the discharge standard A).
The methodology of this project involves the analysis of Chemical Oxygen Demand
(COD), ammonia, nitrate, nitrite and phosphorus. The flow rate for the treatment system is
set at 8Liday, and the detention time is about 10 days. The result from this project shows that
the wetland system with floating plant (Eichhornia crassipes) is able to remove 47% COD,
78% ammonia, 83% nitrate, 80% nitrite and 81% phosphorus after 27 days of treatment.