The paper reports the results of an investigation carried out at lab scale to assess the effectiveness of an innovative technology (SUPERBIO) for treating municipal and/or industrial wastewater. When this technology was applied for treating municipal wastewater, the results showed that even at maximum organic load (i.e., 7 kg COD m-3 d-1), the COD in the treated effluent was lower than 50 mg l-1. In addition, both ammonia and TKN removal efficiencies resulted higher than 87% up to an organic load of 5.7 kg COD m-3 d-1 corresponding to a nitrogen load of 0.8 kg TKN m-3 d-1. Process performances resulted very satisfactory also during tannery wastewater treatment, when a chemical oxidation step (i.e., ozonation) was inserted in the treatment cycle of SUPERBIO. In such an instance, at organic and nitrogen loadings of 3 kgCOD m-3 d-1and 0.20 kg N m-3 d-1, COD, NH4+-N and TSS average removals were (96%), (99%) and (98%) respectively. Finally, during the whole experimentation, SUPERBIO was always characterised by a very low sludge production. Such a result was ascribed mainly to the characteristics of biomass that grew in the form of very dense granules (i.e., 130 gVSS lbiomass-1) allowing to achieve a biomass concentration such high as 50-60 gTSS lbed-1.
AN INNOVATIVE TECHNOLOGY BASED ON AEROBIC GRANULAR BIOMASS FOR TREATING MUNICIPAL AND/OR INDUSTRIAL WASTEWATER WITH LOW ENVIRONMENTAL IMPACT
DI IACONI C;LOPEZ A;RAMADORI R;
2005
Abstract
The paper reports the results of an investigation carried out at lab scale to assess the effectiveness of an innovative technology (SUPERBIO) for treating municipal and/or industrial wastewater. When this technology was applied for treating municipal wastewater, the results showed that even at maximum organic load (i.e., 7 kg COD m-3 d-1), the COD in the treated effluent was lower than 50 mg l-1. In addition, both ammonia and TKN removal efficiencies resulted higher than 87% up to an organic load of 5.7 kg COD m-3 d-1 corresponding to a nitrogen load of 0.8 kg TKN m-3 d-1. Process performances resulted very satisfactory also during tannery wastewater treatment, when a chemical oxidation step (i.e., ozonation) was inserted in the treatment cycle of SUPERBIO. In such an instance, at organic and nitrogen loadings of 3 kgCOD m-3 d-1and 0.20 kg N m-3 d-1, COD, NH4+-N and TSS average removals were (96%), (99%) and (98%) respectively. Finally, during the whole experimentation, SUPERBIO was always characterised by a very low sludge production. Such a result was ascribed mainly to the characteristics of biomass that grew in the form of very dense granules (i.e., 130 gVSS lbiomass-1) allowing to achieve a biomass concentration such high as 50-60 gTSS lbed-1.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
