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Pulsed arc electrohydraulic discharge (PAED) is a direct plasma technology that effectivelytreats a range of contaminants broader than those of other conventional and emerging watertreatment technologies. A review of the literature has indicated that PAED offers advantagesover indirect plasma methods in that it can cost-effectively provide comparable or superiortreatment of microorganisms, algae, volatile organics, nitrogenous municipal waste compounds,and some inorganics. Moreover, these benefits may be available concurrently from onetechnology. Also reported in the literature, preliminary investigations conducted with a limitednumber of target compounds have indicated that effective water treatment with PAED utilizesless than 50% of the kilowatt-hours required by other plasma technologies (e.g., UV) forequivalent levels of treatment. In this paper, plasma technologies are briefly reviewed with afocus on PAED efficacy and disinfection mechanisms. Preliminary data from laboratory-scaleinvestigations of E. coli inactivation by PAED are presented and indicate that 2.6-, 3.3-, and 3.6-log E. coli inactivation can be achieved after the respective application of 6, 18, and 30electrohydraulic discharges (corresponding to detention times of approximately 0.8, 1.5, and 5.8minutes respectively). Includes 14 references, tables, figures.

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Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 10File Size: 1 file , 330 KB