Pollution Treatment

Vetiver can adapt to the soil with high acidity, salinity and alum. The grass has a large root system but the roots are very small and smooth (average diameter is only about 0.5-1.0mm) which is very favorable for the growth of bacteria and fungi; it is necessary for absorbing the decomposition of pollutants. Initially, vetiver is proven the ability to stop spreading dioxin to surrounding land.

Vetiver is used for erosion control and sediment (silt) control. The incredibly tough and deep fibrous roots hold the soil together and reduce erosion.  Where the vetiver clumps are planted close together in a hedge trapping silt particles. The paper describes how to establish VS on minesites effectively. 

The use of Vetiver grass replaces the need for a concrete block lined pit, creates privacy and actively helps decompose the waste. The paper gives a completed guide to make a vetiver latrine.

Processing effluent with very high nutrient and salt contents are stored in two storage ponds. The effluent was used to irrigate Vetiver planting on the banks of the ponds and treated in situ with Vetiver floats on the ponds. 

Vetiver could be used as an integrated technique for environmental management of mining activities. First, solid mining wastes could be stabilized not to release to surroundings. Second, wastewater including acid mine drainage (AMD) could be purified by phytofiltration. Third, the surrounding lands contaminated by heavy metals could be cleaned up by phytoextraction.

Project Manager: Dr.Ngo Thi Thuy Huong _ The VietNam Institute of Geosciences and Mineral Resources (VIGMR) The results shows that Vetiver – Monto ecotype could grow well and normally on soil polluted by Dioxin and Dioxin-Like Compounds in light and medium levels. The growth monitoring data indicated that the best growth period of Vetiver was eight months after planted when the stems reached up to 2.5 m, over 30 new […]

How to set up a wetland model with Vetiver:   1. Substrate and Collection Tanks   2. Filter Layers Large broken stones   Small broken stones   Small gravel layer   Sand layer 3. Vetiver Plantation               – Wastewater is led into the system through the distribution pipelines – Keep pumping until the ground is flooded – Leave Vetiver 2 hours to treat – […]