General Cleanup Technology

The development of coupled in-situ reactors and the optimisation of the geochemical processes in the outflow from various in-situ reactor systems

Two new technologies have been developed to clean mixture contaminations with the aid of in-situ reaction walls. When used in combination, the reactor materials iron and activated carbon filter proved to be the most effective and the most economical. This technology is available to potential users.

 

Summary

Because of previous chemical industry activities in the Bitterfeld area, the ground water there is extensively contaminated with hazardous materials. 

The purpose of this project was to examine the appropriateness of implementing in-situ reactor walls as passive cleaning processes, since they use practically no energy and therefore are much more economical than active cleaning processes.The studies took place in the laboratory and at the pilot plant with regard to suitability, effectiveness, and costing. The tests combined known and proven reaction materials with one another. In addition, the effects of the cleaning measures on the aquifer in the outflow were examined. 

Results: 

  • Two new measures for cleaning mixture contaminations could be developed by showing that iron and an activated carbon filter allow themselves to be combined without any difficulty and that the iron and ORC  (Oxygen Release Compound) are partially usable in combination. This technology is available to potential users. 
  • A preliminary cost estimate of the examined cleaning alternatives showed that the combination of iron and activated carbon filter is in general more cost-effective than the combination of iron and ORC. 
  • The studies of the outflow prove that maintaining the quality of drinking water is possible after a relatively short reaction period. The spreading of a pH-front in the outflow of a reaction wall is to a large degree dependent on the composition of the sediment.

More Project Informations

Project title:  The development of coupled in-situ reactors and the optimisation of the geochemical processes in the outflow from various in-situ reactor systems

Project number:  02WT9938/0

Project period:  1999 - 2002

Project region:  Germany (Schleswig-Holstein)

Project contact:

Herr Dr. Schäfer

+49 (0)431 880 4361

+49 (0)431 880 7606

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Source: German National Library of Science and Technology Hannover (TIB)