HMVT finishes bioscreens with innovative injection-unit at Vanderlande Industries

HMVT recently constructed three bioscreens at Vanderlande Industries in Veghel. The bioscreens were installed in the VOCl contamination present on the site for stimulating the biological decomposition. A new injection unit, the so-called biostimulator, has been introduced for the biological decontamination process. HMVT developed the biostimulator for stimulating the break-down in case of a large VOCl contamination. The start of the biological remediation operations is shown in the following video clip.

Commissioned by Vanderlande Industries, HMVT has installed three bioscreens in Veghel. The bioscreens consist of more than 100 injection filters, installed at a depth of 6, 10, 15 and 20 metres in the VOCl contamination. The injection filters in the bioscreens are filled with an emulsion of soy bean oil. This slow-release substrate serves as nutrition for the micro-organisms that will cause the biological break-down of the contamination.

Injection lances

HMVT has introduced a new injection unit, the so-called biostimulator, for the biological decontamination process. Using this innovative injection unit, large quantities of soya bean oil are mixed with the groundwater at the location. The biostimulator has two mixing tanks holding eight cubic metres, as well as a special mixing pump. Using a fire hose, the prepared emulsion is pumped hundreds of metres away to a distributor unit on a trailer. From here, the emulsion is injected via 10 to 20 filters at once. One injection cycle will be able to stimulate the biological decomposition of VOCl for a period of approximately five years. Thanks to the biostimulator, HMVT has been able to triple the production and injection speed. This improvement has made the stimulation of the break-down process even more cost-effective.

In the next five years, HMVT will take care of monitoring the process for Vanderlande Industries in Veghel. As part of our duties, we will perform 6-monthly field probes on the site of the bioscreens to monitor the break-down process. CSO Consultants will check the situation of the groundwater contamination once every six months. The ultimate goal of the soil remediation process is to stop the further spread of contaminated groundwater. This will result in a stable situation around the contamination in the end.

mobiele injectie-unit

Link:

Also have a look at our webinar (in Dutch) of oktober 18, 2011.

More information:

Christian Soeter and/or Klaas de Jong