AFCEE/ESTCP TECHNICAL PROTOCOL FOR ENHANCED REDUCTIVE DECHLORINATION USING SOLUBLE CARBOHYDRATES

摘要

A protocol document for enhanced reductive dechlorination of chlorinated aliphatic compounds (CAHs) using soluble carbohydrates (Suthersan et al., 2002) has been prepared under funding from ESTCP and AFCEE. The protocol is based on our experience at field pilot and full scale at more than 130 commercial and federal sites and on the experiences of others as presented in the literature. A detailed dataset collected from demonstration sites at Hanscom and Vandenberg Air Force Bases contributed to the development of the protocol. Detailed engineering guidance for implementation of the technology using a variety of food grade soluble carbohydrate substrates is presented. The protocol was modeled on the widely used AFCEE protocols for natural attenuation and bioventing, and includes guidance on the following: Site selection Selection of a suitable carbon substrate for a given set of site conditions Delivery system design, including allowances for heterogeneity Quantitative factors to consider in calculating the initial carbon substrate dose Process monitoring feedback that can be used to optimize substrate delivery System modifications to address site-specific issues of pH, salinity, etc.