HEERLEN – THE NETHERLANDS

HEERLEN – THE NETHERLANDS

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.

Equipment

8 Gas Smart Burners working with propane gas and 16 heating tubes.

Treatment target

  • 80°C at cold points for 1 day
    or
  • 50°C at cold points for 3 days.

Monitoring

• 6 temperature probe wells at cold points (at depths 1.5m and 3m),
• Gas reading at the vent for exhaust gases.

Planning

End of May to mid-July 2022.

Conclusion

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.

Key Data

Contaminants
Japanese Knotweed

Max. Concentration
/

Volume
94m³

Tonnage
169 Tons

Nb of Heating Tubes (in total)
16 heating tubes
8 burners

Temperature Target
80°C for 1 day or 50°C for 3 days

Project Duration
14 days

Treatment Targets
Prevents the growth of new plants

Location
Heerlen, The Netherlands

Client
Municipality of Heerlen

Partner
Thermal Clean Shift

Consultant
Plantengezondheidsdienst

Date
2022

social position
elementum ante. efficitur. commodo id vulputate,