Multiobjective Optimization Models : For Distributing Biosolids to Reuse Fields

ISBN-13: 9783639162288 / Angielski / Miękka / 2009 / 252 str.

Prawat Sahakij

Opis

We develop multiobjective optimization models tosimultaneously minimize biosolids odors as well aswastewater treatment process and biosolidsdistribution costs. A weighting method and constraintmethod were employed to find tradeoff, so calledPareto optimal, points between costs and odors. Schur s decomposition and special order set type twovariables were used to approximate the product of twodecision variables. A Dantzig-Wolfe decompositiontechnique was successfully applied to break apart andsolve a large optimization model encountered in thisdissertation.Using the Blue Plains advancedwastewater treatment plant located in Washington, DCas a case study, we find several Pareto optimalpoints between costs and odors where differenttreatments (e.g., lime addition) and biosolidsdistribution (e.g., to what reuse fields biosolidsshould be applied) strategies should be employed.This model can be used proactively by any typicaladvanced wastewater treatment plants to produce theleast malodorous biosolids at minimal costs.

O autorze

Dr. Prawat Sahakij earned his Ph.D. in Project Management from
the University of Maryland at College Park in USA. Currently, he
works for the Royal Thai Army, Thailand. His current appointment
is at the Engineer School where he teaches field fortifications
and obstacles subject.