A decision support system (DSS) tool for the assessment of intervention strategies (Alternatives) in an urban water system (UWS) with an integral simulation model called ‘WaterMet2’ is presented. The DSS permits the user to identify one or more optimal Alternatives over a fixed long-term planning horizon using performance metrics mapped to the TRUST sustainability criteria. The DSS exposes lists of in-built intervention options and system performance metrics for the user to compose new Alternatives. The quantitative metrics are calculated by the WaterMet2 model, and further qualitative or user-defined metrics may be specified by the user or by external tools feeding into the DSS. A multi-criteria decision analysis approach is employed within the DSS to compare the defined Alternatives and to rank them with respect to a pre-specified weighting scheme for different Scenarios. Two rich, interactive graphical user interfaces, one desktop and one web-based, are employed to assist with guiding the end user through the stages of defining the problem, evaluating and ranking Alternatives. This mechanism provides a useful tool for decision makers to compare different strategies for the planning of UWS with respect to multiple Scenarios. The efficacy of the DSS is demonstrated on a northern European case study inspired by a real-life UWS for a mixture of quantitative and qualitative criteria. The results demonstrate how the DSS, integrated with an UWS modelling approach, can be used to assist planners in meeting their long-term, strategic-level sustainability objectives.
On-site Oil Analysis to extend oil drain intervals
Fleets demonstrate ROI on do it yourself oil analysis “If the oil is good, why would you change it?” Gary Lentsch, CAFM, fleet manager for Eugene Water & Electric Board (EWEB), asked himself. And more importantly, how much was it costing him to change oil when it wasn’t needed? Lentsch began asking himself this after he saw an oil analysis machine at a fleet conference. He had been sending out oil for analysis periodically, but an in-house unit would speed up the process and allow him to...
Real Time TOC Analysis in Steam and Condensate
Executive Summary Steam in petro/chemical plants could be contaminated with hydrocarbons (TOC = Total Organic Carbons) from various sources. In any case this is a sign for defects in the process, whether it they occur in the heat exchanger, the blow down vessel, the condensate recovery or other parts of the system. Conventional solutions to monitor such contaminations use TOC- analyzers that have been developed for water (drinking water, wastewater, boiler feed water,...). This paper presents a solution that...
Ten Ways to Conserve Water This Holiday Season
The holiday seasonis almost here, which to us at WaterSignal means even more opportunities to conservewater! As you gear up for the holidays, save water and money with these ten water saving tips: 1.) Buy recycled paper products: Products made from 100 percent recycled paper require much less water in their manufacturing than those made from virgin paper. 2.) Inspectbathroom fixtures before family and friends arrive.During the holidays, your bathrooms are likely to experience heavier than normal usage and, in...
PeCOD Case Study – Industrial Waste Water
Clean Harbors is an industrial wastewater treatment facility in Guelph, Ontario. The facility utilizes highly refined, chemical precipitation processes, which remove heavy metals, suspended solids, and organics to generate safe effluent for discharge into municipal sewer systems. Wastewater is treated to meet municipal discharge requirements for biochemical oxygen demand (BOD5). Since BOD is a 5-day test, the results cannot be used to continuously monitor organic load. Chemical oxygen demand (COD) is used as a...
Freezing Temperatures Could Place Commercial Properties in Hot Water
With another frigid winter on the way, frozen cooling tower valves andpipe leaks are likely to wreak havoc on commercial property water usage. “As temperatures dropped below zero last year, we began receiving dozens of calls from property managers about their cooling tower’s solenoid valve freezing in thefill position and water continuously flowing out,” states David Taylor, Senior Vice President of WaterSignal, an Atlanta-based green technology company focused on water conversation and leak...