AWWA MTC69727

The Deep Aquifer Treatment System (DATS) is an 8-million gallon per day (mgd)nanofiltration (NF) color removal treatment plant that has operated for the past six years. When theplant was initially put in operation monthly membrane profiles for conductivity (EC) and UV₂₅₄absorbance were routinely conducted on permeate samples from each of the three treatment trainspressure vessels to monitor for potential membrane system integrity including permeate waterquality degradation due to compromised interconnectors, brine seals, end adaptors, o-rings and themembranes.A reduced membrane integrity sampling regime was adopted in 2004 based upon the excellentperformance of the membrane system. Towards the end of 2006 and through the spring of 2008membrane performance had degraded and it appeared that membrane replacement in severalpressure vessels may have been warranted. Staff then renewed its membrane profiling to identify theapparent membrane performance "breeches" that resulted in significant savings over the membranereplacement option. This paper reviews and demonstrates the importance of implementingstandardized membrane profiles and profiling as troubleshooting tools, and presents results of the findings atthe DATS facility that assisted operators in correcting "breeches" in membrane system integritythat are consistent with what are considered the standards for the industry. Includes 3 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2009

Number of Pages:

14

File Size:

1 file , 950 KB