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An Integer Program for Optimizing Sanitary Sewer Rehabilitation Over a Planning Horizon

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Abstract:

Inflow and infiltration (I/I) associated with sanitary sewer pipeline and manhole defects have been known to cause unnecessary treatment expenditures. It is estimated that 10% or more of treated wastewater sources can be attributed to extraneous I/I. This paper documents an optimization model that analyzed costs and benefits of reducing the amount of I/I through selected rehabilitation methods recommended following a closed-circuit TV inspection over a 20-year planning horizon. An integer program was formulated using the General Algebraic Modeling System to optimize the sewer rehabilitation schedule and present value costs of repairs and I/I treatment. Results of a detailed analysis and the optimal rehabilitation schedule for a subshed of the Little Huntington Creek sewer system in Fairfax County, Virginia, are presented.

Keywords: CLOSED-CIRCUIT TELEVISION INSPECTION; COLLECTION SYSTEM; INFILTRATION; INFLOW; INTEGER PROGRAMMING; MODELING; OPTIMIZATION; SEWER REHABILITATION; SEWER SYSTEM EVALUATION SURVEY (SSES)

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143096X122429

Publication date: November 1, 1999

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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