The study analyzed mainly the carbon balance and economic
feasibilities of using water hyacinth to reduce nutrient stock at
a eutrophic water body and to produce biogas. However, the
determination of the optimal processing scale requires further
study on the dynamics of water hyacinth in a given aquatic system.
Moreover, the possibility of using water hyacinth to move a lake
from a eutrophic state to a clean state is affected by both the
dynamics of water hyacinth and that of nutrient stock in the water
body. In turn, the latter is affected by the inflow and the outflow of
nutrients, as well as the stock of water hyacinth. Further studies
should investigate the effect of harvesting water hyacinth on the
regime shift of a water body.