Todd Herrington and Paul Erickson, PhD from REGENESIS presented a webinar hosted by Microbial Insights, Inc. on how to apply and evaluate the effectiveness of PetroFix™, a dual-action treatment remediation product consisting of micron-scale activated carbon for contaminant adsorption and electron acceptors to stimulate biodegradation. The following Q&A include questions from the audience, with answers from Dr. Erickson and Mr. Herrington of REGENESIS, as well as Dora Taggart, President of Microbial Insights.
Questions about PetroFix include:
- What is the difference between the PetroFix technology and PlumeStop/ISCO?
- How do you derive your design calculations?
- How do you know that petroleum hydrocarbons are being biodegraded versus only sorbed?
- Can PetroFix be injected at the same event as other REGENESIS products such as RegenOx®, or would it require an additional injection event?
PetroFix is an activated carbon remediation technology that is easily injected in situ under low pressure, distributes in the subsurface without fracturing, and includes electron acceptors to stimulate biodegradation of petroleum contaminants in soil and groundwater. Along with design considerations, the presentation by Dr. Erickson and Mr. Herrington discussed a former bulk petroleum storage facility where PetroFix was injected in an area with over 50 ppm total petroleum hydrocarbons. Multiple lines of evidence were used to evaluate performance: contaminant concentrations to evaluate contaminant adsorption and removal from groundwater, geochemical parameters to document microbial utilization of added electron acceptors, and QuantArray®-Petro and mRNA analyses to evaluate biodegradation of BTEX and other hydrocarbons.
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