Remediation technology performance

Performance Data for the Completed MTBE Remediation Technology Applications (105 Projects)... 

SDP systems require a gaseous feed, but they can be used in combination with another remediation technology, such as a packed-bed reactor, to treat other waste streams. SDP performance and cost are contaminant specific. 

Allows for fractures to be filled with amendments that improve the performance of remediation technologies. 

According to the vendor, the geologic formation is a limiting factor in the depth at which horizontal drilhng is performed. Formations with vertical fractures that can extend to the surface can pose limitations because driUing fluid can breakout at the surface. Horizontal drilling only improves access to the contaminants and must be combined with a remediation technology. 

Surtek s surfactant remediation is limited by the same factors that affect any pump-and-treat technology. Performance may be reduced in areas with low hydraulic conductivity or high soil heterogeneity. Incorrect formulation and application of the Surtek method can also make NAPLs more mobile, thereby increasing their potential to migrate to previously uncontaminated areas. In addition, no complete process for the treatment of fiuid extracted by the process has been identified. 

Each PAH bioremediation strategy has its own unique characteristics. In general, it can be stated that PAH biodegradation will be most rapid and extensive with bioslurry reactors, followed by solid-phase applications and in situ strategies, respectively. Of course there is a direct relationship between rate and extent of PAH biodegradation and cost of the remedial technology. As described below, site-specific criteria impact the applicability of each strategy as well as the predicted performance criteria. 

Tratnyek, RG. and M.M. Scherer. 1998. Kinetic controls on the performance of remediation technologies based on zero-valent iron, Proceedings of the 1998 National Environmental Engineering Conference Water Resources in the Urban Environment, Chicago, IL, American Society of Civil Engineers, pp. 110-115. 

Applying this soil remediation technology requires special expertise this chapter describes the technology and its applications, indicating the materials and decontamination methods that can be used and how the system should be initiated and controlled. It also specifies the samples that need to be taken in order to monitor the decontamination process. Before remediation can commence, however, it is first necessary to clarify where contamination is present in the area of soil concerned and in what form. It is furthermore necessary to perform electrokinetic laboratory tests with one or preferably more representative soil samples. Finally, it is explained how the data are analyzed and used for carrying out the design of the remediation system. 

Several remediation technologies have been considered for removal of As, F and U from water. RO appears to be the most effective processes to remove these contaminants from aqueous solution. Thus, an application of this technique is reviewed in this chapter along with experimental observations to support the reported performances. 

Evans, M.L., Porges, R.E., Coghlan, G.H., Eilers, R.G., and Glazer, A.G., Methodology and model for performance and cost comparison of innovative treatment technologies at wood preserving sites, Remediation J., 12, 37-54, 2001. 

As shown in Table 24.3, performance data were available for all 323 of the MTBE remediation projects in the dataset. However, most of these projects with performance data are ongoing. To evaluate the performance of specific technologies and projects, 105 completed projects with performance data were identified, along with the minimum, median, and maximum of the highest... 

The treatment performance data for the 19 completed projects presented in Table 24.9 show that SVE (either alone or in combination with other technologies) has been used to remediate MTBE in groundwater from concentrations >100,000 to <50 pg/L and has achieved MTBE concentration reductions >99%. The median project duration for the 19 completed sites ranged from 3 months to 5 years. 

---