TEREDO NAVALIS E LIMNORIA
TEREDO NAVALIS and LIMNORIA , - in daily use called SHIPWORM and GRIBBLE, - are two wellknown problemmakers to all mariners and port autorities.
In the lagoon of Venice, Italy, - where both shipworm and gribble have very good life conditions,- experiments with THE ANTI TEREDO SYSTEMsince 1988 has prooved extreemly satisfying protection of wooden pilings in salt water.
THE ANTI TEREDO SYSTEM- a short introduction
The ANTI TEREDO SYSTEM is based upon research and tests carried out in various ports in Denmark. Described in detail in the report (danish language): Beskyttelsesmidler mod pælekrebs og pæleorm.Dansk ingeniør forening, København 1956.
When using the ANTI TEREDO SYSTEM one very interesting fact is THAT NOTHING IS BEING KILLED , but the wood has been made uninteresting for the woodborers to digest.
When using the ANTI TEREDO SYSTEM a service life of 35 to 40 years of normal pilings can be expected in waters that freeze during winter. In waters where ice is not common during winter a longer lifespan can be expected.
Further can be said :
The astetic look of the pilings are not being changed.
Same piledriving companies can do the job as usual.
No toxic waste.
Local timber can be used as usual.
The steel nail system is well known in scandinavian waters, but the experience from the lagoon of Venice , Italy, are the first known to be made in warm climates where shipworm (Teredo navalis) and gribble (Limnoria) seems to have even better lifepossibilities than in the north.
According to below mentioned report the marineborers present in the lagoon of Venice are:
Felix Rock 1959 (ostr. Akad. Wiss. 1957)
Field tests using the ANTI TEREDO SYSTEM has been carried out since 1988 in the lagoon of Venice, Italy, under the supervision of Michael Kiersgaard, Marine surveyor of wooden vessels.
Michael Kiersgaard Marine Surveyor of Wooden Vessels