Operating Experiences at VOC Treatment Facilities Part 1: GAC

Dyksen, John E.; Raczko, Robert F.; Cline, Gary C.

doi:10.1002/j.1551-8701.1999.tb02160.x

Cited by 1 publication

(1 citation statement)

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“…Third, liquid loadings and volumetric A:W ratios were chosen to cover the range used in practice. A recent survey of existing air‐stripping applications, which were mostly used for TCE and PCE removal, reported that the liquid loadings ranged from 25 to 30 gpm/sq ft (17 to 20.4 L/m 2 /s) and the volumetric A:W ratio ranged from 25 to 50 (Dyksen et al, 1995). For a temperature of 10 °C , this yields a minimum stripping factor of ∼ 5.…”

Section: Experimental Methodsmentioning

confidence: 99%

Evaluating Aeration‐Stripping Media on the Pilot Scale

Narbaitz¹,

Mayorga²,

Torres³

et al. 2002

Journal AWWA

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A pilot-scale air-stripping study evaluated the performance of numerous full-size packing materials in the removal of 11 contaminants in up to 10 flow conditions within the range encountered in practice. The overall liquid phase mass transfer coefficients (K L a) were calculated based on the concentrations within the packing (i.e., excluding end effects). For the operating conditions tested, K L a was greatly affected by the liquid loading. The volumetric air-to-water (A:W) ratio and the stripping factor (R) had very limited effect on K L a, primarily because the stripping factors were significantly > 1. At the various A:W ratios, the authors found distinct relationships between K L a and pressure drop, which indicated that A:W = 25 was more effective than A:W = 50 and A:W = 100. Because the various packing materials performed quite differently, the optimal designs for the various packings will consist of air-strippers of somewhat different dimensions operating under different operating conditions. However, the packing materials' low contribution toward the overall cost and the similarity of the various designs reduce the effect of using different materials. Space and height restrictions, tendency to foul, and ease of cleaning may be more critical design factors in the selection of packing.

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Section: Experimental Methodsmentioning

confidence: 99%