METHOD AND PLANT FOR DEEP PURIFICATION AND DECONTAMINATION OF EFFLUENTS Russian patent published in 2014 - IPC C02F3/00 C02F1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to treatment of effluents. Initial effluent flows via pipe 1 into primary settler 2 to be clarified. From said settler 2, water is fed to aeration tank 3 composed by intermediate settler with activated sludge for deep purification of water from contaminants. Then, effluent flows through thin-bed bio-filter 4 with biofilm arranged at its walls to add to filtration of effluent. From bio-filter 4, it flows into secondary settler 5 to settle activated sludge and suspended particles. This sediment is fed back into aeration tank 3 via pipe 10. Note here that this sediment is subjected to treatment by constant electric field of intensity of 2 kV/m. Moreover, it is treated by plates 11 supplied by constant voltage source 12. From settler 5, effluent flows to filter 6 for final removal of suspended particles. Cleaned and decontaminated effluent in discharge pipe 7 is subjected to treatment by constant electric field of intensity of 2 kV/m. Moreover, it is treated by plates 8 supplied by constant voltage source 9. Excess activated sludge from secondary settler 5 and primary settler 2 sediment are removed from the plant via pipe 13.

EFFECT: high-intensity treatment, lower power input, decreased area of treatment plants.

7 cl, 1 dwg, 2 ex