Case Study 3: Trial on PAH Impacted Sediment from Creosote Site

Challenge: 200,000 tonnes of PAH impacted high clay content sediment located in an ecologically sensitive area
Client(s): Verde Environmental Ltd.
Location: Monard, Co.Tipperary, Ireland
Duration: 3 months
Technology and Product: EcoPile™ and site-specific product
Results: 80% degradation rate
Impact: Provide our client with an efficient, cost effective and green sustainable solutions

Services Provided: Soil pollutant analysis; microbial isolation screening and selection; inoculum design, testing and bioaugmentation; Ecopile design, consultancy during construction, inoculation and monitoring (core sampling, moisture, nitrite, sulfate, ammonium, organic matter, BOD/COD, surface and ground water monitoring); phytocap selection, implementation and monitoring (biomass, root and shoot analysis, total viable counts), TPH and PAH reduction, GC-FID analysis and monitoring.

Result: 80% of PAH were degraded after 3 months. The last monitor after 20 months, PAH was bioremediated to safe levels and all monitoring parameters measured returned to their optimal pre-contamination levels including soil pH and normal microbial populations. As the selected inoculum consisted of natural isolates and as TPH degraders reduced in consistence with as pollutant reduction this was the ideal treatment process in an environmentally sensitive area.