The water hyacinth growth rates in the 3-tank system
and 2-tank system are listed in Tables 2 and 3, respectively.
The overall average daily growth rate of the water
hyacinth was 0.164 kg wet wt./m2 (600 ton wet wt./ha annually or
30 ton dry wt./ha annually) in the 3-tank system and a daily
growth of 0.297 kg wet wt./m2 (1084 ton wet wt./ha annually or
54 ton dry wt./ha annually) in the 2-tank system. It was found that
the growth rate in the larger tanks was significantly higher, 80%,
than that found in the smaller tanks