Remediation of contaminated sites

Bioremediation of aquifers

Treating in-situ aquifers without extracting groundwater

SIAD’s remediation technologies act directly on the groundwater, without pumping out the water. Dissolved oxygen and reducing gases stimulate the biodegradation of organic contamination by indigenous microorganisms.

The action of the gases also removes inorganic contaminants, such as dissolved metals, through the oxidation and precipitation of iron, arsenic and manganese, or the reduction of hexavalent chromium.

Remediation directly into the aquifer, without excavation or pumping

No waste to dispose of

Your site will remain up and running whilst the work is being carried out

The site is always up and running

Micro-injection acts directly on the aquifer without the need to pump out groundwater, allowing remediation to be carried out without disrupting site operations. The systems are compact, easy to install and operate, require little or no energy, and generate no waste or contaminant stripping.

Patented technologies

For every type of contamination, the SIAD Research Laboratory offers patented micro-injection technologies: pure oxygen for aerobic bioremediation (GROUND BIO2®), reducing gases for anaerobic processes (GROUND ReD®) and ozone for chemical oxidation in groundwater (GROUND O3+®).

Targeted measures

Each treatment is precisely scaled using tracer gases, which measure its radius of influence: GROUND MIX® combines pure oxygen and tracers for O₂ technology, whilst GROUND SPY® uses noble gases for other remediation technologies. This approach prevents systems from being oversized and optimises treatment costs.

The GROUND line and the Laboratory’s services

SIAD combines its micro-injection technologies with the expertise of its Environmental Biology and Chemistry Laboratory, from feasibility assessments through to the installation and operation of the systems, right through to data analysis and verification of the effectiveness of site-specific remediation.

GROUND BIO2®: oxygen for bioremediation

With GROUND BIO2®, pure oxygen is micro-injected directly into the aquifer, where it stimulates the aerobic biodegradation of organic contamination by indigenous microorganisms. This increases the dissolved oxygen in the aquifer without causing the contaminants to volatilise, using a compact system with low electricity consumption.

GROUND ReD®: reducing gases in groundwater

When the aquifer requires reducing conditions, GROUND ReD comes into play: reducing gases dissolved in water that promote anaerobic biodegradation and the chemical removal of inorganic contaminants, such as the reduction of hexavalent chromium. An eco-sustainable alternative for the most complex sites.

GROUND O3+®: ozone for oxidation

For the most stubborn organic contaminants, GROUND O3+® delivers ozone directly into the groundwater for chemical oxidation. It rapidly degrades a wide range of recalcitrant substances, increases the biodegradable fraction and facilitates the subsequent bioremediation phase, with evidence of its effectiveness even in the unsaturated zone.

GROUND MIX® and GROUND SPY®: tracer gases

To ensure interventions are correctly scaled, SIAD uses noble gases as tracers to determine the range of influence of its technologies. GroundMix combines pure oxygen or reducing gases with noble gases for the saturated zone, whilst GroundSpy uses noble gases for the unsaturated zone.

Explore SIAD’s other water technologies

Gases and processes for water treatment

Ozone Treatments

CO₂ treatments

Aqua Freed®

Would you like to assess the feasibility of in-situ remediation at your contaminated site?

Our experts at the Environmental Biology and Chemistry Laboratory assess the feasibility of the treatment, select the most suitable gas micro-injection technology and oversee the installation, management and verification of the remediation’s effectiveness at your site.

Request a consultation