The performance of a multi-stage activated-sludge plant with partial biomass recirculation was examined. The system, which was designed to treat domestic sewage, consists of four stages and has two recirculation flows: (a) directly into the anoxic stage, and (b) distributed over all the aerobic stages from the secondary settlement tank. Different values of recirculation flow to each aerobic stage were adopted during the experiments, and the optimal configuration for removing both ammoniacal nitrogen and carbonaceous substrate was determined. The configuration which gave the best performance also improved the sludge settleability.
UPGRADING OF A CONVENTIONAL ACTIVATED-SLUDGE PLANT BY MEANS OF A MULTISTAGE AEROBIC SYSTEM WITH STEP SLUDGE RECIRCULATION (SSR) / DI PALMA, Luca; Medici, Franco. - In: JOURNAL OF THE CHARTERED INSTITUTION OF WATER AND ENVIRONMENTAL MANAGEMENT. - ISSN 1360-4015. - STAMPA. - 15:2(2001), pp. 122-124. [10.1111/j.1747-6593.2001.tb00317.x]
UPGRADING OF A CONVENTIONAL ACTIVATED-SLUDGE PLANT BY MEANS OF A MULTISTAGE AEROBIC SYSTEM WITH STEP SLUDGE RECIRCULATION (SSR)
DI PALMA, Luca;MEDICI, Franco
2001
Abstract
The performance of a multi-stage activated-sludge plant with partial biomass recirculation was examined. The system, which was designed to treat domestic sewage, consists of four stages and has two recirculation flows: (a) directly into the anoxic stage, and (b) distributed over all the aerobic stages from the secondary settlement tank. Different values of recirculation flow to each aerobic stage were adopted during the experiments, and the optimal configuration for removing both ammoniacal nitrogen and carbonaceous substrate was determined. The configuration which gave the best performance also improved the sludge settleability.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
