Full Description

Each water treatment plant design requires consideration of numerous criteriato determine the optimum process for the unique application. The selection oflow-pressure membrane systems is no different. This paper presents the designconsiderations and general needs for successful low-pressure membranesystem selection. There are several options to consider when evaluating low-pressuremembrane filtration as a potential solution. Today, there are a range oflow-pressure membrane systems available with varying membrane chemistry,pore size, module configuration and operating restrictions. Each membraneprocess has specific operating characteristics inherent to its unique properties.For each application the overall system design and the scope of work requiredfrom the system supplier are equally important in the selection process.The evaluation process needs to determine the critical operating parameterssuch as flux, trans-membrane pressure (TMP), backwash interval, chemicalcleaning process and frequency, waste volume, and coagulation chemistry, ifrequired, for successful scale-up operation of the full-scale system. The full-scalesystem should be based on a pilot test or representative data for thespecific membranes that will be applied. There are other factors to be evaluatedthat are not easily quantifiable. A key consideration is the method to monitormembrane integrity and the ease of detection, isolation and repair of individualfibers or modules. Other considerations are robustness of the system design,availability of local service, and process support capability in the event of anunusual process upset. The evaluation should also consider the compatibility ofthe system to accept technological improvements. Includes 3 references.

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Edition: Vol. - No. Published: 03/05/2003 Number of Pages: 9 File Size: 1 file , 190 KB