Thermoplastic Techniques

In thermoplastic processes, the waste is dried, heated, and then dispersed through a heated plastic system. Bitumen is the most common matrix material. However, paraffin and polyethylene have also been employed. The final mixture is then cooled and is usually embedded in a containment system. Organic chemicals that could react with the plastic matrix, leading to physical deterioration, cannot be disposed of with this technique. The process employs specialized equipment, is energy-intensive, and requires trained operators. The elevated temperatures of the process limit the types of materials that can be incorporated into the matrix (e.g., citrates). Typically, the associated leach rates are low. Also, the binders tend to perform well in resisting water and microbial attack.

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