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Pipe laying

Activated-carbon filters and
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Case study Adsorption

Wide-ranging Semi-Volatile Halogenated Hydrocarbon (SVHH) contamination in groundwater was discovered on a site where a former industrial-scale dry cleaners was in operation.

Three distinct contaminated areas were accounted for with varying SVHH concentrations:

Treatment Plant Specifications:

Progress of contaminant concentration:

Trichloroethylene contributed to the majority of the contamination (~90%), while roughly 5% of total contamination was determined to be cis-Dichloroethene. Other SVHH species and Vinylchloride appear only on particular sampling locations and in secondary concentrations.

ARGUS operates groundwater remediation and downstream groundwater contain-ment on the site since 2002. Downstream groundwater flow is contained by a row of 13 groundwater extraction wells over a distance of approx. 500m.

Groundwater is cleaned using a staged-activated carbon installation and is then di-rected into the receiving waters of the Uchte River. The Installation is equipped with a remote monitoring unit.

Number of Wells

13

Flow rate

10 - 20 m³/h

Inflow Concentrations (2002)

10.700 µg/l

Discharge Limit

200 µg/l

Adsorption stage

3 x 2 m³ Water Activated Carbon

Inflow Concentrations (2010)

Durchsatz

8,5 m³/h

Biologische Stufe

2 x 2 m³ Bio-Festbettreaktoren

Aktivkohle

2 x 2 m³ Wasseraktivkohle

Fernüberwachung

2.900 µg/l

Areal 1:

5.000

-

11.000

µg/l

Areal 2:

13.000

-

83.000

µg/l

Areal 3:

3.000

-

10.000

µg/l