1,4Dioxane and PAH removal with Ozone Peroxide Advanced Oxidation Process
Existing granular media filtration is utilized for iron and radium removal. Manganese removal is incomplete due to competition with ammonia for oxidant within the system.
VOC removal including cis-1,2-dichloroethene (DCE), Trans-1,2- DCE, Dichlorofluroomethane, Trichloroethene (TCE), and vinyl chloride was successful with the air stripping process.
The advanced oxidation process testing resulted in 99% reduction in 1,4 dioxane from 23 ppb to 0.13 ppb with ozone and hydrogen peroxide AOP, meeting the state treatment requirements. Various doses of ozone and hydrogen peroxide were used with varying results in the pilot testing process and will be discussed. PAH reduction was also reviewed with 94% reduction in the preliminary iron and manganese filtration process. Additional review is currently underway for PAH reduction in the AOP process and results will be available at the time of the conference.
This presentation summarizes testing objectives, layout, and results from initial bench scale testing, pilot testing at the well sites, and additional bench scale testing for chemical dose optimization.