Skip to main content

Operational Cost Optimization Modeling for Conventional Activated Sludge Process

The full text article is not available for purchase.

The publisher only permits individual articles to be downloaded by subscribers.

or click here to sign up for a free trial

Abstract:

Energy and solids processing cost accounts for 40% of the total operation and maintenance costs in wastewater treatment facilities. This indicates the potential for saving operation and maintenance costs through the process optimization. The limitations of most cost optimization studies carried out in the past are either these studies could not be applied to existing facilities as the objective function includes both construction and operational cost or the operational costs ignores pumping or solids processing costs or operational cost uses empirical cost curves ignoring actual equipment data. In this study an optimization model was developed to minimize the total operational cost of a conventional activated sludge system taking into consideration energy costs associated with pumping and aeration, solids processing cost, and the equipment system data while satisfying the effluent requirements and process stability criteria.

The cost optimization model developed has been minimized using an optimization technique called, the simulated annealing (SA) method. In order to demonstrate the usefulness of the model, a case study has been presented for a typical hypothetical conventional activated sludge treatment system 18,900 m3/d (5 Mgal/d) in size, and the cost savings have been compared with the operational costs of the traditional operation of the plant under standard rules. A sensitivity analysis was also performed to study the impact of the variation in unit energy and sludge processing costs on optimum operational parameters.

Keywords: ACTIVATED SLUDGE; O and M COSTS; OPTIMIZATION; SIMULATED ANNEALING; WASTEWATER

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864707787452417

Publication date: October 13, 2007

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Partial Open Access Content
Partial Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more