Bioremediation Case Studies

Use of BSI PAS 100 compost in contaminated groundwater:

Contamination of groundwater by hexavalent chromium Cr(VI) is of concern due to it being toxic, carcinogenic and mutagenic in nature, as well as highly mobile in soil and aquatic systems. This study assesses the potential of BSI PAS 100 accredited composts, derived from green and green/food waste sources, for the remediation of Cr(VI) contaminated groundwater. A series of batch and column experiments were conducted, followed by a pilot trial on a contaminated site. 

New Cut canal restoration project, Warrington:

A section of contaminated silted up canal is being restored to create an Urban Ecology Park. Compost socks and compost-filled gabions are being used to enhance biodiversity and their effectiveness will be compared to traditional gabion designs that incorporate rock fill and coir matting.  Contamination pathways within both the content of the compost-filled gabions and through the compost amended substrates covering contaminated canal dredgings will be assessed. 

Metal mine water remediation, Newcastle:

This laboratory trial examines the use of BSI PAS 100 compost to remediate mine water from metal contamination from zinc, lead, cadmium and copper. Findings so far show promising results in terms of the potential for the BSI PAS 100 compost to attenuate metals and will feed into field trials once completed.

Remediating Ebbw Vale:

A trial at Ebbw Vale assessed the treatment of soil contaminated with polyaromatic hydrocarbons (PAH) and total petroleum hydrocarbons (TPH) using ex situ bioremediation. BSI PAS 100 green compost and contaminated soil were mixed at a ratio of 3:1 (contaminated soil to compost) and placed in a biopile . The biopile was covered with a geo-synthetic membrane and the remediation process was monitored for 11 weeks.