Tar Remediation

Tar Remediation

New possibilities

With the development of the vertical mill, Lobbe opened up new possibilities to remediate tar disposal sites economically, and above all quickly. Among the major environmental major projects on the territory of the former GDR were “Teerdeponie Neue Sorge”, “Teerdeponien Terpe / Zerre”, “VEB Teerverarbeitungswerk Rositz”, “Teerteiche Lauta” and “Großgaserei Magdeburg-Rothensee”. These were all successfully completed under the direction of Lobbe, and no longer pose an environmental threat today. The amount of tars and tar-oil solids (Toef) extracted comes more than one million tonnes.

Lobbe-Live “Remediation of tar disposal site Neue Sorge”

lobbe live

The name fit: “Neue Sorge” (New Concern). The landfill, an opencast mine in Rositz (county Altenburg) filled with an estimated 300,000 tonnes of tar, was at the time the largest contaminated site problem in the state of Thuringia. In the first phase, more than 50,000 tonnes of tar were remediated within six months. The closing balance sheet showed about 250,000 tonnes. On 17 September, in the presence of the political community and the citizenry, the remediation of Neue Sorge was officially declared complete by the Thuringian state government. The actual tar remediation was completed in mid-2008.

The documentary video was made during the “hottest” phase of the project. Due to ignorance of the facts, it was initially accompanied by scolding from the media and civil protests. Supported by a targeted information campaign in the immediate vicinity and surrounding communities, the existing bias, especially against Lobbe, was completely dispelled.

Here you can read about one of the successful remediation projects:

The remediation of the tar disposal sites “Terpe/Zerre”

In the ARGE VTL (Arbeitsgemeinschaft “Verwertung Teerdeponien Lausitz”), Lobbe was commissioned to collect and recycle tar-laden residues from the Terpe waste dump and the Zerre storage area (close to Schwarze Pumpe, Brandenburg/ Sachsen state border at Spremberg). Within six years, 585,000 tonnes of tar and tar oil solids were remediated. The sediments involved tar oil residues (tar oil solids) containing a variety of tar oils, water and solids in various consistencies. Lobbe was tasked with not only designing and planning the project, but with restoring and conditioning the tar oil solids as well. This included the construction and commissioning of a facility for accepting and processing liquefied tar oil solids.
For the liquefied tar oil solids, Lobbe was able to make use of a floating dredger already on hand at the Zerre site to recover some 200 tonnes of residues each day, pumped under 100-bar pressure through pipes to the storage area. Starting in autumn 2000, a facility was brought online to pelletize some 300,000 tonnes of tar oil residues for later recycling in the secondary raw material recycling centre.

Main achievements

  • Recovery of 120,000 tons of liquid/pasty tar oil solids from the Zerre storage site using a floating dredger, as well as 20,000 tons of liquid/pasty tar-oil solids from the Terpe waste product heap; heating and homogenisation of the recovered tar oil solids.
  • Recovery of 360,000 tons of solid/pasty tar-oil solids, as well as 69,000 tons of coal dross and mud using excavating technology.
  • Pelletization of the solid/pasty tar oil solids and of the coal dross and recycling of the pellets using a fixed bed gasifier.
  • Purification of approximately 1 million m3 of ground water, as well as the disposal of 40,000 m3 of heavily contaminated surface water
  • Use of qualified, specially equipped locations.
  • Temporary storage and refilling of approximately 300,000 m3 of soil, construction debris and slag using mobile earth moving technology; backfilling including certification of compaction

The use of the existing facilities for backfilling and disposal and the construction of the new storage and loading facilities provided for a significant improvement in the quality of the product. The pelletisation facility, which opened in the second half of 2000, fulfilled the requirements for the recycling capabilities of solid/pasty products. Once all investments were made available, the two landfills were dismantled parallel to one another, including recycling of the recovered product volumes.