Beneficial Use of Waste Streams for Mine Site Rehabilitation, New Zealand

Okane have investigated waste products for beneficial reuse at mining operations, which involved detailed geochemical assessments. This includes the refinement of passive treatment strategies for acid metalliferous drainage (AMD) impacted waters using waste mussel shells from the seafood industry. Treatment using mussel shells include both carbonate neutralization of acidity and benefits derived from sulfate reducing bacteria. Cement kiln dust, a by-product of the cement industry, has also been investigated for cover design of acid forming waste rock. Such solutions often deliver very attractive cost benefit outcomes.

Photos below from Dave and Matt’s presentation at North America Gathering in February 2019, Lessons Learned from 10 Years of Project Work at Boliden’s Aitik