Pesticide Bioremediation – Landfarming Application for DDD, DDE and Toxaphene

Petrox® bioremediation was used to remediate pesticide-contaminated soil at an industrial location in California.

Soil Remediation

The soil contamination consisted of pesticides including 4,4-DDD, 4’4-DDE and toxaphene.  Soil samples were sent to CL Solutions for bench-scale treatability studies.   The following table shows the  maximum detected concentrations and the treatment results.

Contaminant
Untreated Concentrations (ug/Kg)
Post-treatment concentrations (ug/Kg)
4,4-DDD
390
250
4,4-DDE
380
220
Toxaphene
8,500
440

After the bench-scale verification, full-scale bioremediation was implemented.  The contaminated soil was placed in two stockpiles and treated with Petrox. The following table shows the pre- and post-treatment results.

Contaminant Concentrations (ug/Kg)
Contaminant
Pile 1
Pile 2
Before
After
Before
After
4,4-DDD
310
170
14
nd ( <5)
4,4-DDE
810
300
8.7
nd  (<5)
Toxaphene
12,000
7,300
380
nd (<5)

Conclusions

The Petrox treatment successfully reduced the concentrations of pesticide contaminants in the soil stockpiles.  For additional information or assessment of applicability to your site contact CL Solutions.

Bioremediation Product Safety

CL Solutions wants to assure you that our products are safe for human health.  All of our products are manufactured under strict health and safety protocols.  Starting with seed cultures, that are known to be safe, from known sources the cultures are grown in sterile sealed tanks.  The finished products are also stored in laboratory-clean areas.  Manufacturing and laboratory areas have separate ventilation systems to prevent product contamination.

Some other manufacturers of bioremediation products use open-top growing tanks that can be contaminated by atmospheric organisms.  These manufactures do not control the type of organisms that may be present in their products.

CL Solutions’ products are tested for viability and the absence of pathogens prior to shipping.  Not all bioremediation manufacturers follow the high QA/QC protocols of our manufacturer.

You can be confident with our bioremediation products that you will get only beneficial microbes and the products will be pathogen free.  These safety measures protect our workers, your workers, and people who live or work at the site.

 

 

 

New Custom Blend Available for Denitrification

CL Solutions has provided Petrox DN for denitrification for many years.  Petrox DN is a freeze-dried consortium that requires hydration before application.  CL Solutions now provides a custom blend of microbes in a dry powdered form with denitrification capabilities. This dry blend makes for more convenient storage and use.  Additional organisms in the consortium can degrade ammonium and organics including petroleum hydrocarbons, fats, carbohydrates, proteins, starches and cellulose.  These benefits make the custom blend a powerful tool for bioremediation of liquid waste in fixed facility treatment or environmental applications.

Call CL Solutions for more infomation or a site evaluation at 513-284-5940.

Perchlorate Remediation Receives Greener Cleanup Leadership Award

The Massachusetts Department of Environmental Protection awarded Irwin Engineering of Natick, Massachusetts the 2016 Greener Cleanup Leadership Award for the innovative in situ bioremediation of perchorate contamination of soil and ground water at the Concord Road Site in Billerica, Massachusetts. The award honors LSPs and their clients for promoting greener cleanup principles and practices to reduce the overall net environmental footprint of hazardous waste site cleanup response actions under the Massachusetts Contingency Plan.

In addition to implementing best practices, Irwin Engineers was able to close the site at least 5 years sooner and saving their client over $5 million. The site cleanup achieved residential soil standards without site use limitations and achieved ground water levels protective of drinking water.

Land Farming Application Reduces TPH by 90% to 99%

Petrox microbes were added to excavated petroleum-contaminated soil to accelerate the degradation of DRO and ERO total petroleum hydrocarbons. Petrox was added by spraying the surface of the soil with a hydrated Petrox solution.  The microbes were mixed into the soil using a tractor-mounted disc tiller.  photo-2              photo-1

After approximately 60 days, soil samples were taken for testing.  The soils showed 90% to 99% petroleum removal.  The following chart shows the range of DRO and ERO concentrations before and after Petrox treatment.

land-farming-results