Remediation and disposal for Manfredonia, Italy

PROJECT DATA

Region: Puglia/Italy
Client: Syndial Spa (ENI Group)
Participants Bilfinger Berger Ambiente Srl, ARE Deutzen GmbH, Bilfinger Berger Entsorgung Nord GmbH
Period: November 2006/ September 2008
Project value: €18.0 million

WORK PERFORMED

Excavation, transport, thermal treatment and disposal of 100,000 tons of soils contaminated with caprolactam

PROJECT BACKGROUND

Enichem Agricoltura SpA, a 100% subsidiary of the Italian state-owned holding ENI, operated a chemicals plans in Manfredonia, southern Italy, from 1970 to 1980. The process residues containing caprolactam that accumulated regularly during production were placed in several landfills on the company grounds.
The site and landfills required remediation when the chemicals plant shut down in the early 1980s.

PROJECT COMPLETION

Bilfinger Berger Ambiente Srl bewarb sich im Jahr 2006 erfolgreich mit einem schlüsselfertigen Sanierungskonzept, welches die gesamte Prozesskette der Sanierung beginnend mit der kostenoptimalen Trennung der kontaminierten Massen direkt beim Aushub, über die Sicherstellung der Transportlogistik zu verschiedenen italienischen und deutschen Behandlungs- und Entsorgungsanlagen, bis hin zur Behandlung und finalen Entsorgung umfasste. Der Startschuss zur Sanierung der Werksdeponie „Isola 12“ fiel im September 2006 mit Erhalt des Auftrags.

In 2006, Bilfinger Berger Ambiente Srl placed a successful bid with its turnkey remediation concept, which addressed the entire process chain, from cost-optimised separation of the contaminated masses directly during excavation, assurance of transport logistics to various treatment and disposal facilities in Italy and Germany, through to its treatment and final disposal. Remediation of the plant landfill Isola 12 began in September 2006 when the contracts were placed.

Immediately after excavation, the contaminated material was tested directly at the building site and then transported on covered lorries to the designated disposal facilities in specially designed containers. In order to guarantee the large number of necessary transports in the set project period, Bilfinger Berger Ambiente designed an efficient and just-in-time logistics chain. Intermodal (road-rail-road) transport was used to bring the highly contaminated materials to the thermal treatment facilities at ARE Deutzen GmbH in Deutzen and Bilfinger Berger Entsorgung Nord GmbH in Bremen, where it was thermally purified and disposed of finally. Besides the logistical challenges, the material’s strong odour emissions caused by highly volatile organic constituents required management in particular. Some of the treatment facilities at der ARE Deutzen GmbH have multiply encapsulated storage spaces and encased thermal systems and were therefore able to provide a resilient solution to this problem.