The effectiveness of phytoremediation using water lettuce (Pistia stratiotes) in liquid waste treatment

This study aims to analyze the effectiveness of phytoremediation using water lettuce (Pistia stratiotes) in domestic wastewater treatment at Kualanamu International Airport. Based on the hierarchy, Kualanamu International Airport has a hub type essential for transportation connectivity for domestic and international routes. Therefore Kualanamu International Airport is an airport that is very important not only in a short period but for a very long period, so handling the liquid waste problem needs to be done. In this study, improvement of waste treatment methods with phytoremediation with Pistia stratiotes with the addition of aeration, nutrients and time. Based on the result obtained, the longer the contact time and the increasing accumulation of aeration and nutrition can increase the effectiveness of phytoremediation in Pistia stratiotes. In this study, BOD, COD, Fe, Oil and Fat level will be decreased with the addition of the aeration variation of 3 L/min and the addition of 3 g of nutrients with a contact time of 48 hours, but for decrease Zn level optimum with the addition of 3 L/min aerations and the addition of 2 g of nutrition with a contact time of 48 hours and the optimum decrease ammonia level with the addition of contact time to 24 hours with 3 g of NPK fertilizer because some plants to die and settle in the water which causes excess ammonia.