Studies on the Abilities of Vetiveria zizanioides and Cyperus alternifolius for Pig Farm Wastewater Treatment

摘要

Vetiveria zizanioides and Cyperus alternifolius were measured for their ability to decontaminate pig farm wastewater in 50 × 38.5 × 23 cm (L × W × H) plastic boxes. These plants were grown in pig farm wastewater with COD_(Cr) at 825 mg/L, BOD_5 at 500 mg/L, NH_3-N at 130 mg/L and TP 23 at mg/L, C. alternifolius and V. zizanioides could cut down those index to 64% ,68% ,20% and 18% respectively by hydraulic retention time (HRT) of 4days. Statistical result showed that there were significant differences in COD,BOD and TP between treatments with plants and those without plants.