METHOD OF TREATING WASTE WATER WITH COMPACTED SLUDGE IN SERIES-PERIODIC REACTOR Russian patent published in 2025 - IPC C02F3/12 C02F3/30 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of treating waste water (20) contaminated with carbon, nitrogen and phosphorus compounds in a series-periodic reactor (SBR). SBR includes: a chamber which may contain a mixture of wastewater and sludge having different levels; a sludge layer containing polyphosphate-accumulating organisms (PAO) at the bottom of the chamber, above which the level of the suspended sludge layer is determined; means for determining minimum level and maximum level of sludge removal in chamber; removal means suitable for removing sludge at different levels between the minimum removal level and the maximum removal level; wherein said method includes steps of: filling (101) with SBR is carried out, during which a certain amount of waste water (20) to be treated is fed into the region near the bottom of the chamber into the sludge layer; reaction sequence (102) is carried out, comprising: at least first anaerobic step (103), during which radioactive wastes capture contaminating carbon compounds and release phosphorus compounds; optionally second denitrification step (104) under oxygen-free conditions; third aeration step (105), at which it is possible to perform dephosphatisation of waste water with radioactive wastes; performing decantation (106), during which the sludge is deposited on the bottom of the chamber and the contents of the chamber near the surface are clarified; diverting (107) the clarified fraction of the contents of the chamber, wherein said diversion steps (107) and filling (101) are carried out simultaneously; and removal (108) of at least a portion of the light sludge at a predetermined level.

EFFECT: possibility of treating a large amount of waste water with a smaller footprint, high rate of decantation.

8 cl, 7 dwg