A homeowner asked you to design a wetland to treat her family’s greywater for garden irrigation. She estimated that the average greywater flow is about 500 L/day. An analysis of the greywater found the following characteristics: TSS ~269 mg/L, BOD5 ~305 mg/L, EC ~1.03 ds/m, pH 7.4, Fecal coliforms 2.5* CFU/100 mL. The
regulation requirements are: TSS less than 20 mg/L, BOD less than 30mg/L, and fecal coliform count less than 10 CFU/100 mL. What area is needed for the vertical flow constructed wetland based on the BOD (use KBOD of 0.22).