72
R.H. Charlier and Th. Lonhienne
and one for professional use. In addition, a Belgian company (SOPEX)
has tested a digester in Morocco which extracts methane from processed
algal residues. Other experiments were conducted on Sein Island.
Methanization remains one of the best modes of utilization of algae.
To assign a commercial value to green tide algae has been discussed for
the specific case of Brittany in the frame of a biotechnical seminar in
Morocco (Brault and Briand 1984).
2.8 Conclusion
Obviously, processing plants for algae vie for space along coasts with
other industries whose economic return is far better. However, because
they act as a water cleanser, and because their removal and subsequent
use enhances the touristic and recreational worth of a given coastline, a
sound management plan should include such facilities.
Research is needed to assess what degree of benefit is gained from
biomass harvesting and what is due to the whole ecosystem in nutrient
removal. No treatment plant will see the day before it is established
clearly whether seaweeds are an efficient tool for removal of nutrients.
Stabilization of Ulva green tides has been proposed and tested for
Hillion Bay (France). Composting with a minimum of ligno-cellulosic
substrates was successful and a pilot plant for the treatment of algal
biomass is being considered for the area. (Morand et al. 1992).
As indirect effects of blooms on the ecosystem are far from well
understood (e.g. energy transfer and production of calcifying organisms), elucidation of factors that determine the occurrence and species
composition of phytoplankton blooms (flagellates proliferation) and
their impact on the microbial food web should be pursued. Therefore we
should search for the causes of the geographical spread of bloom-forming species. Systems ought to be developed to detect triggering conditions and to warn of their impact.
Removal of "nutrients production" at the source will reduce the load
carried fluvially to the sea and thus treatment of used industrial waters,
and action on domestic wastes should be an integral part of a management plan for "eutrophication control". In the Inland Sea of Japan, a
reduction of organic input drastically reduced red tides. Obviously such
prophylaxis is indicated.
The Commission of the European Communities (now European
Union) sponsored under its BRIDGE (COST 48) program a Symposium-
R.H. Charlier and Th. Lonhienne
and one for professional use. In addition, a Belgian company (SOPEX)
has tested a digester in Morocco which extracts methane from processed
algal residues. Other experiments were conducted on Sein Island.
Methanization remains one of the best modes of utilization of algae.
To assign a commercial value to green tide algae has been discussed for
the specific case of Brittany in the frame of a biotechnical seminar in
Morocco (Brault and Briand 1984).
2.8 Conclusion
Obviously, processing plants for algae vie for space along coasts with
other industries whose economic return is far better. However, because
they act as a water cleanser, and because their removal and subsequent
use enhances the touristic and recreational worth of a given coastline, a
sound management plan should include such facilities.
Research is needed to assess what degree of benefit is gained from
biomass harvesting and what is due to the whole ecosystem in nutrient
removal. No treatment plant will see the day before it is established
clearly whether seaweeds are an efficient tool for removal of nutrients.
Stabilization of Ulva green tides has been proposed and tested for
Hillion Bay (France). Composting with a minimum of ligno-cellulosic
substrates was successful and a pilot plant for the treatment of algal
biomass is being considered for the area. (Morand et al. 1992).
As indirect effects of blooms on the ecosystem are far from well
understood (e.g. energy transfer and production of calcifying organisms), elucidation of factors that determine the occurrence and species
composition of phytoplankton blooms (flagellates proliferation) and
their impact on the microbial food web should be pursued. Therefore we
should search for the causes of the geographical spread of bloom-forming species. Systems ought to be developed to detect triggering conditions and to warn of their impact.
Removal of "nutrients production" at the source will reduce the load
carried fluvially to the sea and thus treatment of used industrial waters,
and action on domestic wastes should be an integral part of a management plan for "eutrophication control". In the Inland Sea of Japan, a
reduction of organic input drastically reduced red tides. Obviously such
prophylaxis is indicated.
The Commission of the European Communities (now European
Union) sponsored under its BRIDGE (COST 48) program a Symposium-