Process for decreasing the nitrate content in water

Details Process for decreasing the nitrate content in water Process for decreasing the nitrate content in water

C - Chemistry, Metallurgy

02

F

362/9

C02F 1/72 (2006.01) C02F 1/64 (2006.01) C02F 3/30 (2006.01)

Patent

CA 1255817

Abstract The invention relates to a process for decreasing the content of nitrate in ground water, artificial ground water, that is infiltrated surface water, or surface water flowing through an aquifer or through a basin or a filter containing naturally occurring filter material. Water containing denitrification organisms and/or substrate there- fore is introduced intermittently through a number of injection wells or injection pipes arranged around one or more extraction wells or extraction pipes for purified water. During each introduction of water containing de- nitrification organisms and/or substrate therefore said water is fed to only some of said injection wells or pipes and simultaneously water is drawn from nearby, adjacent or intervening injection wells or pipes for the purpose of creating a denitrification zone at a distance sufficient- ly far from the extraction well or extraction pipe.

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