Sewage Water Treatment in Constructed Wetlands With Vetiver Grass

Abstract

Untreated sewage is the main reason for soil and water pollution. Constructed wetland technology is an emerging and acceptable wastewater treatment method as it can effectively remove almost all types of pollutants without harming the environment. The aim of this study was to find the effectiveness of constructed wetland technology using the vetiver plants (vetiveria zizanioides l. Nash) in sewage treatment. The vetiver plants were planted in the constructed wetland. After 90 days, the test groups were treated with 250ml of sewage on alternate days and are allowed to grow for further 15 days. After the experiment, the treated sewage from the tank was collected and the changes in physico-chemical characteristics were examined. The results show that more than 65% of the total pollution load including heavy metals in the sewage was eliminated within 15 days of treatment in the constructed wetland. So, the vetiver-constructed wetland can be considered as an effective, low-cost, eco-friendly technology for sewage treatment.