HEERLEN – THE NETHERLANDSadmin
Context & Project Description
The infested materials at the treatment site contains Japanese knotweed rhizomes, known as a parasitic plant species in Europe. The site is located on the roadside in the municipality of Heerlen in the Netherlands where a small plant of Japanese knotweed was growing.
The treatment objective is to reach a certain temperature to prevent the growth of new plants through these rhizomes and stop its invasion. There are two specificities in this project: no vapor tubes since no polluted vapor and secondary tubes to minimize the number of burners but optimize the heating in the complete area. The area was about 25m² and the depth of treatment was 4 meters.
8 Gas Smart Burners working with propane gas and 16 heating tubes.
- 80°C at cold points for 1 day
- 50°C at cold points for 3 days.
• 6 temperature probe wells at cold points (at depths 1.5m and 3m),
• Gas reading at the vent for exhaust gases.
End of May to mid-July 2022.
Haemers Technologies’ thermal treatment of the Japanese knotweed plant has proven so far to have worked. No new plant can be seen on site or in samples in good regrowth condition. The regrowth will continue to be monitored during the next weeks.
Nb of Heating Tubes (in total)
16 heating tubes
80°C for 1 day or 50°C for 3 days
Prevents the growth of new plants
Heerlen, The Netherlands
Municipality of Heerlen
Thermal Clean Shift