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Reedbed filters: a solution for treatment of drainage water from soilless cultures

Reedbed filters: a solution for treatment of drainage water from soilless cultures

Infos Ctifl 216: 33-37

One of the options under investigation as a means of limiting nitrogenous discharge from soilless cultures is a denitrification process being evaluated in southern France, which uses filter beds planted with reeds or Scirpus (Tule reeds). In these installations, denitrification is mediated by bacteria which transform nitrates into gaseous nitrogen. A carbon supply is needed to ensure sufficient activity of the denitrifying bacteria.

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