Full Description

The Southeast Morris County Municipal Utilities Authority's (Authority) Clyde Potts Reservoirhas been serving the residents of Morristown New Jersey for over 70 years. Over that time, thetreatment facilities have evolved in response to new water quality regulations. The originaltreatment, constructed in 1935 was limited to chloramination and pH adjustment with lime. In1984, the Authority constructed a direct pressure filtration plant in response to the new turbiditystandards. In 1998, the Authority constructed a 0.5 MGD demonstration membrane treatmentplant to comply with the requirements of the Surface Water Treatment Rule. The demonstrationfacility enabled the Authority to assess the effectiveness of this relatively new technology andgain valuable experience and operating data. The demonstration facility was procured byperforming a desktop treatment evaluation and a series of pilot tests and then bidding of themembrane system. The membranes provided for the demonstration facility were a pressurizedtype. Based on the operation of the demonstration plant, in 2000 the Authority commenced withthe design of a full-scale 2.5 MGD membrane plant. The new plant, which uses immersedmembranes, was placed into successful operation in November 2004. The project presentedseveral challenges including the following:based on the Owner's experience with a pressurized membrane system, was a differentmembrane system warranted for the full-scale plant given advances in technology?;as part of the demonstration plant, the membranes were procured by bidding of themembranes separately from the installation contract, was there a "better" way toimplement the entire membrane project, and should the Owner consider design build or solesourcing the membranes?;given the rapid advancements in membrane technology, what design enhancementscould be made to the facility to prevent the system from becoming obsolete?; and,there were no sewers in the vicinity of the site and therefore all residuals needed to beeither recycled, disposed of in a local stream, or hauled off site. The full scaleplant recycles 99.9% of the raw water. Waste discharge is limited to recovery andmaintenance cleans.The Authority's response to these challenges is presented in this paper. In addition, the membraneoperating history is discussed. After 2 years of operation, the membrane cleaning hasexceeded design expectations. Currently recovery cleans are being performed every 3 months.Since the membranes that were used had only been recently introduced by the manufacturer atthe time of construction, approximately 2 years of operating data is available and isdiscussed. The Owner has also implemented a web based membrane management system withthe membrane vendor. The performance of this state of the art web based diagnostic system isalso discussed. Includes tables.

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Edition: Vol. - No. Published: 11/01/2006 Number of Pages: 9File Size: 1 file , 330 KB