Referring to single activated sludge pre-denitrification systems, a new model for the coupled design of biological reactors and settling tanks is presented. Both soluble and particulate biodegradable organic substrates are considered, together with ammonia and nitrate-nitrogen substrates. Biological processes are modelled using expressions obtained by mean mass balance equations, whereas limiting flux theory is adopted to simulate sedimentation phase. Explicit expressions of biological reactors volumes and settling tank surface are obtained. The effect on volume values caused by influent wastewater characteristics variations, which are typical of small wastewater treatment plants, are illustrated and discussed.
A New Coupled Model for the Design of Biological Reactors and Settling Tanks in Pre-Denitrification Systems
FABBRICINO, MASSIMILIANO;PIROZZI, FRANCESCO
2002
Abstract
Referring to single activated sludge pre-denitrification systems, a new model for the coupled design of biological reactors and settling tanks is presented. Both soluble and particulate biodegradable organic substrates are considered, together with ammonia and nitrate-nitrogen substrates. Biological processes are modelled using expressions obtained by mean mass balance equations, whereas limiting flux theory is adopted to simulate sedimentation phase. Explicit expressions of biological reactors volumes and settling tank surface are obtained. The effect on volume values caused by influent wastewater characteristics variations, which are typical of small wastewater treatment plants, are illustrated and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
