Does not treat metals. Selenium in uranium wastewater reduced from 0.58 to 0.03 ppm in 48 hours. Activated carbon or sand serves as growth surface for bacteria. Wastewater and nutrient pumped through bed. Selenium is precipitated and removed by flushing or cross-flow filtration Uranium wastewaters may be treatable.
Technology involves biostimulation of indigenous or introduced selenium- reducing bacteria.
140 ppm chlorobenzene. The process can be adapted to treat neutral and basic tailings solutions. Constructed Wetlands Ground water Nitrate and Uranium Principal components - pea gravel and various species of emergent aquatic plants. Cell pump powered by solar panels. Other measured parameters are pH, dissolved oxygen concen- tration, and water temperature.