Biological phosphorus and nitrogen removal in a full scale sequencing batch reactor treating piggery wastewater

Research activities carried out at ENEA during the last few years allowed t he development of a Sequencing Batch Reactor (SBR) that is able to remove b iologically,organic waste, nitrogen and phosphorus and that was shown to be particularly suited to obtaining low effluent nutrient concentrations even starting from concentrated wastes. Research on optimisation of time cycles and on process modelling, allowed an advanced comprehension of reactor beh aviour and the development of a process able to obtain more than 98% remova l of nitrogen, phosphorus and GOD, and therefore almost capable of matching effluent standards with a wie biological process. On the basis of laboratory results and process modelling, a full scale SBR plant has been designed and realised. This plant, in ten months of operatio n, is achieving even better results compared to the laboratory ones. (C) 19 99 IAWQ Published by Elsevier Science. All rights reserved.