Antimethanogenic Reagents (AMR) to Control Excessive Methanogenesis During Remedial Actions
Approach/Activities: Antimethanogenic reagents (AMRs) have been developed to specifically and proactively control Archaea growth during ERD and ISCR remedial actions. In various trials, the AMRs were effective at rapidly reducing ORP, stimulating reductive dechlorination reactions, maintaining pH, and reducing methane production as compared to their controls. The AMRs have been integrated into various remedial amendments (e.g., liquid ERD, solid ISCR, EZVI materials, sediment capping materials) and are currently the subject of independent laboratory and field studies evaluating performance, efficacy, longevity and impacts on environmental microbiology. Information on the reagents modes of action, dosing / application requirements, and lessons learned during their field implementation will be presented along with results of field performance monitoring and application costs.