AWWA MTC69756 Digital PDF

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Wildfire and Membranes: An Economic and Risk Analysis Framework for the Evaluation of Membrane Pretreatment Options
Conference Proceeding by American Water Works Association, 11/01/2009

Document Format: PDF

Description

This powerpoint presentation begins by presenting the concept of sustainable membrane operation, and the devastating impacts of wildfires to watersheds, and to membrane operations including: every wildfire is different and the impact to watershed isalso different;no membrane plant in North America has experiencedsevere water quality due to wildfire (limited experience);high turbidity carry over (especially fine colloids) andorganics in membrane feed water could causeirreversible fouling; and,high Fe and Mn could be troublesome. Challenges to membrane processes are presented and include:mitigating membrane fouling; augmented pretreatment (coagulation, sedimentation, powdered activated carbon [PAC],permanganate, fine screen, granular activated carbon [GAC], ozone, etc.);intensified cleaning regime;reduced flux;maintain minimum production to satisfy emergencydemand;membrane warranty;will be voided once membrane feed water quality is out ofspec; and,vendors may not want to warrant a wildfire scenario. An economic analysis framework for membranepretreatment process selection is presented and includes the following topics:Capital Cost;Annual O&M Cost;Direct Financial Impact;Indirect Financial Impact; and,Non-Financial Factors. Presentation summary includes the following:Sustainable Membrane Operation is the Key to aSuccessful Membrane WTP;Wildfire Poses a Significant Threat to Membranes;a combination of Emergency Operation withEnhanced Pretreatment could reduce theImpact from Wildfire; and,an Economical Analysis Framework is Developedto Assist the Selection of AppropriatePretreatment Processes to Balance Risk, Cost,and Non-Financial Factors. Includes tables.

Product Details

Edition:
Vol. – No.
Published:
11/01/2009
Number of Pages:
27
File Size:
1 file , 1.1 MB
Note:
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