Author:Zehra YILMAZ, Kemal GÜR, Esra TARLAN
Publishing Date: 2005
Volume 20 Issue 4
Characterization of domestic wastewater from Selcuk University Campus and the effectiveness of duckweed (Lemna Minor L.) in wastewater treatment was searched in lab scale system. In wastewater characterization, grab and composite samples were taken from the S.Ü. Campus during one year and parameter analyses were performed. Wastewater treatment was applied on composite samples in batch and continuous operation in tanks with dimensions of 50*50*20 cm, placed in a climate room where temperature, lightening and humidity were under control. pH, turbidity, suspended solids (SS), dissolved oxygen (DO), chemical oxygen demand (COD), nitrate-N, ammonia-N, total P and heavy metal variations in the influent and effluent were analysed. Control tanks were also processed in parallel with the experimental tanks. The results indicate that, despite the fluctuating quality, duckweed is effective in treatment of Campus wastewater, which is a medium strength domestic wastewater. Aquatic plant is able to reach its ultimate removal efficiency in 7 days with growth rate of 4.5 g/d. Considering all parameters, it can be stated that in batch system, 65 – 90%, in continuous system 72 – 95% removal efficiencies were achieved. Therefore, utilization of Lemna Minor L. can be suggested for small-scale treatment facilities with fluctuating quality influent.
Key Words: Treatment; characterization; Lemna Minor L.; duckweed; S.U. Campus wastewater.