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Lobbe - 18.05.2012

URL: http://www.lobbe.de/en/solutions-services/site-clean-up/tar-remediation/chemnitz-gas-works/index.html

CHEMNITZ GAS WORKS

Task: Empty and clean up the Chemnitz gas works pit complex

Time frame: June 1999 to April 2000

Substances: 2,050 m³ solid tar sediment as well as viscose tar residues and 4,400 m³ of water

Chemnitz gas works

The former gas works at Chemnitz included a pit complex containing tar and contaminated water that had to be cleaned out.
Lobbe did treatability testing and predesign investigation to analyse the situation to determine the magnitude of the contamination as well as to establish the most expedient and appropriate clean-up methodologies.

  • Abriß des Stahlbetons
  • Abriß des Deckenbereichs
  • Kleinbagger bei Konditionierung

Information

The lightly contaminated water was purified on-site before returning it to the local sewage sys-tem. Heavily contaminated water required off-site treatment. Tar mixtures with viscosities allo-wing material to be pumped could be thermally conditioned. For this process, a modular heating system was set up at the site. Heavy viscous materials were dug out using normal excavation equipment.

Removal of the partially fluidised residues required special treatment: Foam mortar was added to the material as a binding substance. This increased the viscosity of the material, allowing it to be normally excavated. The recovered material was moved on special conveying ramps and hauled away in covered vehicle