Laundry facility as a pollution source
One of the remediation projects Doranova conducted in 2020 was a former laundry facility situated in Southern Finland, Hyvinkää. The groundwater of the area had been contaminated by chlorinated solvents used in laundry operations. The laundry facility was operational from 1960’s to 1995. Solvents had leaked to the ground at least during a fire that took place in 1970’s.
The contaminated area has been classified important for the water supply and therefore the aim of the treatment project was to reduce pollutants in groundwater to the level that the safe usage of groundwater could be started again. In situ was selected as a main remediation technology so that the need of excavating and disturbances to near-by residents could be minimized.
Active remediation phase lasted only for a month
In this project tetrachloroethylene and its decomposition products were treated with Anaerobic Reductive Dehalogenation (ARD) in where contaminants decompose with a help of anaerobic microbes in reductive conditions.
The actual work on the site was conducted with DoAct® DIRECT -direct push injection technology, in where remediation chemicals were injected to the ground by utilizing high pressure pumps and augers.
The main benefit of the direct injection technology is the speed of the process. In this case the active remediation process only took for a month but the reactions in the ground will continue from on to two years.
A video from the remediation project can be seen here.