With the right temperature and amount of oxygen and nutrients, microbes can do their work to 'bioremediate' the harmful chemicals. Sometimes mixing soil can cause harmful chemicals to evaporate before the microbes can eat them. To prevent these chemicals from polluting the air, we mix the soil inside a special tank or building where chemicals that evaporate can be collected and treated. Microbes can help clean polluted groundwater as well as soil. To do this, we drill wells and pump some of the groundwater into tanks. Here, the water is mixed with nutrients and air before it is pumped back into the ground. The added nutrients and air help the microbes bioremediate the groundwater. Groundwater can also be mixed underground by pumping nutrients and air into the wells. Once harmful chemicals are cleaned up and microbes have eaten their available 'food,' the microbes die.
The Adventus Bioremediation Advantage
The time it takes to bioremediate a site depends on several factors:
- types and amounts of harmful chemicals present
- size and depth of the polluted area
- type of soil and the conditions present
- whether cleanup occurs above ground or underground
These factors vary from site to site. Adventus products are 50% less expensive than Regenesis offerings, such HRC, HRC-X, and ORC. They are also longer lasting, and do not allow the creation of problematic intermediates. It can take a few months or even several years for microbes to eat enough of the harmful chemicals to clean up the site. EPA uses bioremediation because it takes advantage of natural processes. Polluted soil and groundwater can be cleaned at the site without having to move them somewhere else. If the right conditions exist or can be created underground, soil and groundwater can be cleaned without having to dig or pump it up at all. This allows cleanup workers to avoid contact with polluted soil and groundwater. It also prevents the release of harmful gases into the air. Because microbes change the harmful chemicals into water and harmless gases, few if any wastes are created. Often bioremediation does not require as much equipment or labor as most other methods. Therefore, it is usually cheaper. Bioremediation has successfully cleaned up many polluted sites and is being used at 50 Superfund sites across the country.
Adventus Bioremediation Solutions and Products
DARAMEND® and TERRAMEND™ for ex situ, on-site treatment of soil and sediment impacted by recalcitrant organic compounds (high molecular weight PAHs, pesticides). Performance guaranteed.
EHC® technologies for in situ chemical reduction (ISCR) of chlorinated solvents, pesticides and heavy metals.
mGCW systems for in situ treatment of groundwater impacted by volatile organic compounds (refined petroleum hydrocarbons, chlorinated solvents).
Permeable reactive barrier (PRB) technology using zero-valent iron (ZVI) for the remediation of groundwater impacted by chlorinated solvents.
ISBS for in situ biogeochemical stabilization of DNAPL for the purposes of source removal and flux reduction to facilitate enhanced passive remediation (accelerated natural attenuation) of dissolved plumes.
AQUAMEND® for in situ or ex situ bioreactor treatment of inorganic compounds (e.g., nitrate, perchlorate) and persistent organics.
Adventus Bioremediation Case Studies
Adventus has successfully treated sites contamination with the following hazardous materials:
- Carbon Tetrachloride
- TPHs (entire range)
- Total Chlorophenols
- Total PAHs
- HMW PAHs2
- Total HCHs
- Endrin Ketone