Title

Assessing And Maintaining Membrane Performance In A Postsedimentation Ultrafiltration Process

Keywords

Flux; Membrane; Permeate; Sedimentation; Ultrafiltration

Abstract

A pilot test program was conducted to evaluate methods for maintaining the productivity of a hollow fiber ultrafiltration membrane operating at constant flux values of 49.2 and 62.3 gallons/ft2-day. The ultrafiltration pilot filtered settled water from a conventional surface water treatment plant in Florida. The testing assessed the impact of different chemical maintenance protocols on UF membrane performance. Seasonal variations in water quality necessitated changes in the type and combination of cleaning agents used to maintain membrane performance. Sodium hypochlorite, citric acid and sodium hydroxide were used during pilot testing as the fouling characteristics of the water changed with time. Pilot results were used to develop alternative chemically enhanced backwash strategies that varied with seasonally-impacted changes in feed water quality. Citric acid, with a target pH of <3, was found to be effective in August and September; whereas, a combination of citric acid and high pH sodium hydroxide chemically enhanced backwashes successfully maintained performance between November, 2010 and May, 2011. © IWA Publishing 2012.

Publication Date

7-2-2012

Publication Title

Water Practice and Technology

Volume

7

Issue

2

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.2166/wpt.2012.041

Socpus ID

84862839041 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84862839041

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