Description
Correlation between monochloramines (NH<sub>2</sub>Cl) and membrane solute rejection andproductivity based on data from an extensive pilot study are summarized in this paper.Decreasing salt rejection was observed during selection of CSF pretreatment, whichincluded Actiflo-Rapid Sand Filtration (RSF), Super Pulsator (SP)-RSF and Zenonsubmersed micro-filter. Decreasing productivity was observed in the long term phase ofthe project. Varying salt rejection and productivity indicated loss of membrane integrityand was correlated to NH<sub>2</sub>Cl mass loading.During phase II, 4 LPRO membranes were tested using Actiflo-RSF and Zenon microfiltrationand chloramination. The performance of eight membranes wasmonitored continuously over 6 months. Membrane productivity and solute mass transfermass loading models were developed from this data set and incorporated NH<sub>2</sub>Cl massloading in an overall mass transfer coefficient that incorporates time of operation andchloramine dose. Productivity and solute mass transfer coefficient changed with timedue to natural film degradation, oxidation (NH<sub>2</sub>Cl), fouling (NPDOC or UV-254)turbidity). NH<sub>2</sub>Cl were found statistically significant correlation to membrane slowdegradation. Includes 3 references, tables, figures.
Product Details
- Edition:
- Vol. – No.
- Published:
- 03/01/2007
- Number of Pages:
- 10
- File Size:
- 1 file , 400 KB
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
