Wastewater Collection System Optimization for Cost-Effective and Sustainable Capital Improvement Planning

Abstract

One of the greatest challenges facing water utilities when developing wastewater planning strategies is to find solutions that are not only cost effective in the short term but that also provide the desired level of service over the life of the infrastructure. Uncertainties in future population forecasts, climate change impacts, rates of system deterioration and accuracy of hydraulic model calibration can have a significant impact on planning solutions. A powerful new decision-support approach is now being used to evaluate wastewater collection system improvement alternatives and select cost effective inflow and infiltration (I/I) reduction targets. This planning approach assists wastewater management professionals in developing capital improvement plans which meet affordability constraints while maintaining sufficient flexibility to accommodate future uncertainties. This paper describes the application of genetic algorithm (GA) optimization to collection system master planning and gives an overview of how it has been used by Johnson County Wastewater (JCW) since 2007 for planning upgrades to the Turkey Creek wastewater collection system in Kansas, USA.

Sewerage Pumping Station Optimization Under Real Conditions

“…Spotreba energie tvorí často najväčšiu nákladovú položkou celkových nákladov generovaných počas životného cyklu čerpadla. Náklady na energiu môžu dominovať ostatným nákladom, hlavne ak je čerpadlo v chode viac ako 2000 hodín za rok (Wilson et al, 2010).…”

“…Problems occur in case of multiple serial, parallel or combined connections of PSs. Energy costs can outweigh other costs, especially if the PS runs more than 2000 hours per year (Wilson et al, 2010). It has been shown that there is a large technical and economic potential for energy savings in sewage pumping.…”

“…Uncertainties in predictions of future population size, climate change impacts, rates of system deterioration and accuracy of hydraulic model calibration can have a significant impact on planning solutions. (Wilson et al, 2010). In the course of nonlinear climate processes in nature where extreme events occur increasingly, solving the problem is indispensable.…”

“…Spotreba energie tvorí často najväčšiu nákladovú položkou celkových nákladov generovaných počas životného cyklu čerpadla. Náklady na energiu môžu dominovať ostatným nákladom, hlavne ak je čerpadlo v chode viac ako 2000 hodín za rok (Wilson et al, 2010).Bolo dokázané, že existuje veľký technický a ekonomický potenciál úspor energie pri čerpaní splaškových vôd. V praxi sa môžeme veľmi často stretnúť s predimenzovaním čerpadiel.…”

A Review of Wastewater Treatment Techniques

“…The wastewater can divided depending on the source of it into four main groups: municipal wastewater, industrial wastewater, hospital wastewater and agriculture wastewater [2][3]. The produced wastewater from the difference resources is collecting and conveying through sewerage systems (also known as sewers systems) to the wastewater treatment plant for treatment before disposal or reuse it [4].…”