5. Bioslurry

Another keyword: bioreactor

The "bioslurry" technique involves treating the soil in a reactor with sufficient water to keep the soil particles (pulp) in suspension (figure 5 ). Prior excavation of the soil is mandatory. This technique is already in use on major construction sites, and provides greater control over biological treatment processes. Bioslurry is the most expensive of the biological treatment techniques and therefore remains somewhat marginal.

• Principle

  Both names (bioslurry, bioreactor) refer to the same ex situ process. The first stage consists in creating a thick slurry by suspending the fine part of the soil in water. Solid percentages are generally between 10 and 50% (by weight). Nutrients are...