Bergendahl, John Andrew
This project studied the feasibility of different options for treatment of Acid Rock Drainage (ARD) at the Cooledge Brook site in Northborough, MA. The feasibility of several treatment alternatives was systematically evaluated, and an ex situ active treatment system and an in situ permeable reactive barrier were chosen for bench testing to measure their effectiveness at treating site water. Both tests neutralized pH of the drainage water from 4.23 to above 6, reduced dissolved aluminum concentrations from 40,280 ppb to below 500 ppb, and reduced dissolved nickel concentrations from 422.2 ppb to below 50 ppb. A pilot-scale design for ex situ active treatment and in situ PRB was developed and recommendations for future ARD treatment were presented for the Cooledge Brook site.
Worcester Polytechnic Institute
Major Qualifying Project
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