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CE 421/521- Environmental Biotechnology

A Review on the Development of Modeling and Design of Biological Nutrient Removal Activated Sludge Systems 

Yu-Ting Huang

ABSTRACT

A literature review on the significant biological processes in activated sludge systems that affect carbon, nitrogen and phosphorus removal from municipal wastewater is reported in this paper. It delineates the progress in developing a general kinetic model which is able to simulate carbonaceous energy (COD), nitrification and denitrification, and biological excess phosphorus removal under wide range of activated sludge systems, from aerobic systems to anoxic/aerobic systems. Effort has also been made to compare the general model proposed by the IAWPRC (now IWA) Task Group with the model described in this article. The both models are acceptable insofar as modeling of COD and N removal in activated sludge systems. The kinetic model of biological excess phosphorus removal developed so far is established and the simulated outcome is satisfied as well.

KEYWORDS

biological nutrient removal (BNR), model development, kinetic model, activated sludge system, simulation, biological process