|
Sorptionsmaterialer til on-site rensning af MTBE-forurenet grundvand - screening SummaryPurpose The purpose of this project is to evaluate the technical and economical potential for on-site treatment of MTBE-contaminated groundwater using different commercially available sorption products. The potential of the different products is evaluated through a comparative series of laboratory experiments conducted under Danish conditions. 15 products tested A total of 15 commercially available products have been compared with regard to their sorption capacity for MTBE; 6 types of activated carbon, 7 synthetic products, and 2 natural-fibre products. Experimental conditions The screening has been performed on intact products in Aalborg tapwater at 20 – 23°C. According to Danish conditions, the used water type can be characterized as representative of water from non-polluted limestone aquifers. 7 products technically unsuitable On the basis of the screening, 7 of the tested products are found technically unsuitable for treatment of MTBE-contaminated groundwater; these are 5 of the synthetic products and the 2 natural-fibre products. All of the six types of activated carbons tested are found technically suitable for treatment of MTBE-contaminated groundwater. 2 synthetic products technically superior to activated carbon The two remaining synthetic products (Ambersorb® 563 and 572) are technically superior to the types of activated carbon tested. These synthetic products, however, are no longer commercially available since, during the course of this project, the manufacturer decided to discontinue the production of these products. Economic comparison of technically suitable products A technical-economic comparison of the 8 products that were found technically suitable for treatment of MTBE-contaminated groundwater has been carried out. The comparison was based on a calculation of the operating costs associated with consumption of sorption material and was used for an overall evaluation of the product types that realistically can be applied in treatment of MTBE-contaminated groundwater. Filtrasorb® 400 is the most cost-effective On the basis of the technical-economical comparison it is concluded that activated carbon of the type Filtrasorb® 400 is the most cost-effective of the technically suitable products investigated (including Ambersorb® 563 and 572). The price for treatment of MTBE-contaminated groundwater is approximately between 4.5 and 9.6 DKK/m3 (at 1 and 10 mg MTBE/l, respectively). These prices are based on carbon consumption alone. Further investigation of Filtrasorb® 400 A series of supplementary technical and economical analyses were carried out for Filtrasorb® 400 in the second phase of the project (Miljøstyrelsen, 2000). These synthetic products, however, are no longer commercially available since, during the course of this project, the manufacturer decided to discontinue the production of these products. Economic comparison of technically suitable products A technical-economic comparison of the 8 products that were found technically suitable for treatment of MTBE-contaminated groundwater has been carried out. The comparison was based on a calculation of the operating costs associated with consumption of sorption material and was used for an overall evaluation of the product types that realistically can be applied in treatment of MTBE-contaminated groundwater. Filtrasorb® 400 is the most cost-effective On the basis of the technical-economical comparison it is concluded that activated carbon of the type Filtrasorb® 400 is the most cost-effective of the investigated technically suitable products (including Ambersorb® 563 and 572). The price for treatment of MTBE-contaminated groundwater is approximately between 4.5 and 9.6 DKK/m3 (at 1 and 10 mg MTBE/L, respectively). These prices are based on carbon consumption alone. Further investigation of Filtrasorb® 400 A series of supplementary technical and economic analyses have been carried out for Filtrasorb® 400 in the second phase of the project (Miljøstyrelsen, 2000).
|