01
Heavy TPH soil remediation
US refinery site
Background
Approximately 1,000 tons of soil contaminated with heavy petroleum hydrocarbons required treatment, with TPH concentrations exceeding 55,000 ppm (5.5% by weight).
Technology Used
Self-activated persulfate oxidation system combined with P-ABR microbial nutrient additive
Approach
Chemical oxidation stimulated indigenous microorganisms while the nutrient amendment promoted their growth — combining chemical and biological degradation pathways.
Results
- TPH reduced from 55,000 ppm to below 500 ppm (0.05%)
- Treatment cost approximately $32.50 per ton of soil