Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

Let's eat at home

ENVIRONMENTAL GEOTECHNICS CONTRACTS

A GEL THAT nourishes bacteria has been used in the bioremediation of an industrial site in Old Stratford, Warwickshire.

The site, formerly occupied by Anglian Water, is being redeveloped for housing.

Contractor Response Bioremediation used its Response Bio Gel to treat 3,900m 3of soil containing high concentrations of diesel range organics, benzene, toluene, ethylbenzene, xylene and volatile organic compounds.

Consultant Joynes Pike & Associates commissioned the work on behalf of McClean Homes. Response worked with the Environment Agency to develop a remediation strategy and a sitespecific mobile plant licence working plan.

Bio-Gel was injected into the treatment area to 3.7m depth using 19mm diameter hand-held lances on a 1.5m grid. The nontoxic organic food grade substance is used as a carrier, insulator and initial source of nourishment for the bacteria used in bioremediation of soils and water with high levels of hydrocarbon contamination.

The gel contains the optimum mix of non-pathogenic bacteria (found naturally in soils), nutrients and dissolved oxygen. This promotes colonisation of biomass and assists bioremediation. As part of the process, the Response Bio-Gel is consumed and converted into carbon dioxide and water.

Chemical analysis of soil sampled four, eight and 12 weeks after injection finished confirmed target values had been reached, with injections reducing contamination to acceptable levels 12 weeks after work was completed.

Groundwater, surface water and soil gas were monitored during bioremediation and results used as part of the validation programme submitted to the Environment Agency. House construction began immediately injection had finished.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.