COMBINED CHEMICAL AND BIOLOGICAL WATER TREATMENT PROCESS

摘要

The disclosure is of a process capable of continuous operation for eliminating or reducing the nitrate and/or nitrite content of nitrate and/or nitrite-contaminated water and for selective nitrogen formation by a combined biological/chemical-catalytic process for reducing nitrate and/or nitrite. In a first reactor in an advantageously designed reactor cascade, oxygen is removed from the water by chemical-catalytic means to produce anoxic conditions; in a second reactor, a selected highly efficient microbiological flora is deliberately introduced and allowed to colonise; and in a third reactor (and, if necessary, further reactors), further chemical-catalytic treatment is carried out.