For the growth of vetiver grass species found to Songkhla 2 can grow in water flushed waste concentration formaldehyde 4,000 mg/l. Section 3-genetic line Songkhla vetiver and Royal varieties with growth of up to 30 days.
For the growth of the grass. Songkhla found two species can thrive in waste leachate COD concentration of 4000 mg / l. The grass species and Songkhla three variants confer a growth of up to 30 days.
For the growth of grass, it was found that the species can grow in Songkhla 2 leachate leachate COD concentration, 4 000 mg / L). The vetiver varieties and genetic line Songkhla 3 Royal has grown up to date 30.