TREATMENT OF POLLUTED SURFACE WATER BY Dracaena sanderiana IN FLOATING CONSTRUCTED WETLAND

Abstract

Floating constructed wetland (FCW) is an ecological measure that is somewhat superior to surface water treatment compared to other types of wetlands because it can be applied in situ, is flexible to fluctuating water levels, and does not require additional land. Applying ornamental plants to FCW adds to its landscaping advantages and can create economic value. Therefore, the study evaluates the ability to treat polluted surface water of Dracaena sanderiana in the laboratory-scale FCW to provide a scientific basis for practical application. Experimental FCW is made of plastic carrier to support experimental plants floating on the surface of a 22 L water tank with a cross  diameter of 300 mm. The changes of water quality parameters including COD, TSS, , ,  in two phases lasting for 13-17 days showed that the treatment efficiency of lucky bamboo plant did not have a big difference compared to the control system which was unvegetated (< 20%) and was significantly lower than that of Cyperus alterfonius (> 27%) in the FCW. Lucky bamboo plant is a beautiful ornamental plant with economic value but does not show its superiority in treating polluted surface water in FCW.