Title

The Effect Of Monochloramine On Membrane Degradation

Abstract

Correlation between monochloramines (NH2Cl) and membrane solute rejection and productivity based on data from an extensive pilot study are summarized in this paper. Decreasing salt rejection was observed during selection of CSF pretreatment, which included Actiflo-Rapid Sand Filtration (RSF), Super Pulsator (SP)-RSF and Zenon submersed micro-filter. Decreasing productivity was observed in the long term phase of the project. Varying salt rejection and productivity indicated loss of membrane integrity and was correlated to NH2Cl mass loading. During phase II, 4 LPRO membranes were tested using Actiflo-RSF and Zenon microfiltration and chloramination. The performance of eight membranes performance was monitored continuously over 6 months. Membrane productivity and solute mass transfer mass loading models were developed from this data set and incorporated NH2Cl mass loading in an overall mass transfer coefficient that incorporates time of operation and chloramine dose. Productivity and solute mass transfer coefficient changed with time due to natural film degradation, oxidation (NH2Cl), fouling (NPDOC or UV-254) turbidity). NH2Cl were found statistically significant correlation to membrane slow degradation. © 2007 American Water Works Association Membrane Technology Conference All Rights Reserved.

Publication Date

12-1-2007

Publication Title

2007 Membrane Technology Conference and Exposition Proceedings

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84874734175 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84874734175

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