Operational cost reduction of an activated sludge system: Correlation between setpoint and growth substrate

George Simion Ostace, Anca Gal, Vasile Mircea Cristea, Paul Şerban Agachi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This work presents the optimization of two control strategies of the wastewater treatment plant. The control architectures are assessed from an operational costs point of view, and improved by adding an upper, supervisory level of control. The upper control level dictates the optimal set-point for the two control structures by taking into consideration the quantity of ammonia nitrogen that enters the wastewater treatment plant. The relationship between the quantity of ammonia nitrogen that enters the WWTP and the optimal setpoint was established by means of linear and polynomial interpolations. The study is based on the modified Benchmark Simulation Model No. 1 (BSM1). Two modifications were made to the BSM1. The first one is the implementation of an enhanced Activated Sludge Model No. 3. This model includes two additional processes that describe the direct growth of the heterotrophic biomass on readily biodegradable substrate, in both anoxic and oxic conditions. The 2nd modification of the BSM1 regards the secondary settler, which is considered to be reactive. The simulation results show that by using the supervisory level of control the total operational cost can be reduced with almost 15.5 %, while effluent standards are maintained.

Original languageEnglish
Title of host publicationIAENG Transactions on Engineering Technologies - Special Edition of the World Congress on Engineering and Computer Science 2011
Pages71-84
Number of pages14
Volume170 LNEE
DOIs
Publication statusPublished - 2013
EventWorld Congress on Engineering and Computer Science, WCES 2011 - San Francisco, CA, United States
Duration: Oct 19 2011Oct 21 2011

Publication series

NameLecture Notes in Electrical Engineering
Volume170 LNEE
ISSN (Print)18761100
ISSN (Electronic)18761119

Other

OtherWorld Congress on Engineering and Computer Science, WCES 2011
CountryUnited States
CitySan Francisco, CA
Period10/19/1110/21/11

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All Science Journal Classification (ASJC) codes

  • Industrial and Manufacturing Engineering

Cite this

Ostace, G. S., Gal, A., Cristea, V. M., & Agachi, P. Ş. (2013). Operational cost reduction of an activated sludge system: Correlation between setpoint and growth substrate. In IAENG Transactions on Engineering Technologies - Special Edition of the World Congress on Engineering and Computer Science 2011 (Vol. 170 LNEE, pp. 71-84). (Lecture Notes in Electrical Engineering; Vol. 170 LNEE). https://doi.org/10.1007/978-94-007-4786-9_6