| 摘要 |
The invention relates to treating waste waters. The inventive method for biologically treating waste waters and for recycling sludge consists in sorbing and oxidising waste waters in an activated sludge biocenosis with the aid of a biological film, wherein said method is carried out successively in three stages which differ from each other by the use of activated sludge biocenosis and a biological film, in mixing the active sludge with a treatable waste water in an ascending-descending flow formed in an aerotank by turbulising a water-air mixture obtainable by low-intensity cavitation and aeration, in separating the caught sludge into parts,one of which is supplied to one of the aerotanks for sludge regeneration, whilst the other part is supplied for treating recycled sludge, which is treated by high- and low-intensity cavitation in several cycles whose number is equal to or greater than two, in compacting the sludge during clarification and in supplying supernatant ferment-enriched water to a the initial stage of the water treating process. The advanced treatment, the separation of treated water and the retention of swelled sludge and biofilm particles are carried out gradually in two-three steps. |
