Column testing can be conducted by BioHeap using either 1m or 5m columns. This phase of testwork consists of some verification work, agglomeration trials, column leaching trials to investigate leach kinetics and recoveries as well as ancillary work such as crusher and abrasion index determination.

BioHeap have standard testwork and reporting procedures for this work and this work is performed either on a cost plus basis or via a fixed price arrangement. A more in depth design criteria can be developed from this test work and a detailed report is prepared.

Large scale, on-site column trials can also be conducted or managed by BioHeap via a consultant arrangement.