Operation of counter-current air-stripping towers at higher loading rates

Nirmalakhandan, Nagamany; Speece, Richard E.; Peace, J.L.; Jang, Won

doi:10.1016/0043-1354(93)90144-7

Cited by 6 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several studies investigated the influence of operating parameters on the removal efficiency. In general, VOC removal efficiency was found to depend on temperature, air-to-water (A/W) ratio, hydraulic loading rates, packing materials, size, depth and diameter, gas pressure drop, and Henry's constant of the contaminant (Chuang et al 1992, Nirmalakhandan et al 1993, Alam and Hossain 2009, Mourad et al 2012, Abdullahi et al 2013b). …”

Section: Factors Affecting Air Stripping In a Packed Column Air Strippermentioning

confidence: 94%

“…Over 99% VOC recovery using air stripping has been reported in the literature (Chuang et al 1992, Nirmalakhandan et al 1993, Negrea et al 2008, Zareei and Ghoreyshi 2011. Air stripping has also been used along with other treatment methods such as adsorption, catalytic oxidation, pervaporation, and nonthermal plasma as an integrated system for the treatment of VOCs (Chuang et al 1992, Worrall and Zuber 1996, Zareei and Ghoreyshi 2011, Abdullahi et al 2013a.…”

Section: Introductionmentioning

confidence: 92%

“…Packing offers resistance to flow under given air and water loading rates. The packing media "hold up" a certain amount of liquid depending on the relative amount of space (gap) left between them, which is referred to as voidage (Nirmalakhandan et al 1993). …”

Section: Effect Of Shape and Height Of Packing Materialsmentioning

confidence: 99%

“…Alam and Hossain (2009) also reported an increase in ammonia removal from industrial wastewater with increase in A/W flow ratio. According to Nirmalakhandan et al (1993), the design of most countercurrent packed towers for air stripping in environmental application is for operation under low liquid and gas loading rates. Mourad et al (2012) reported that the typical gas-liquid ratio for packed bed air stripper will range from 10:1 to 30:1.…”

Section: Effect Of A/w Ratiomentioning

confidence: 99%

“…However, the operating cost may escalate because of the need to use high-performance, costly packing materials. Most countercurrent packed towers used for air stripping in environmental applications are generally designed to operate under low liquid loading and gas rates (Nirmalakhandan et al 1993). For a given packing material, the transfer efficiency of a given chemical increases with the air and water loading rates.…”

Section: Hydraulic Loading Ratesmentioning

confidence: 99%

See 4 more Smart Citations

Application of a packed column air stripper in the removal of volatile organic compounds from wastewater

Abdullahi

Hassan

Noor

et al. 2014

Reviews in Chemical Engineering

View full text Add to dashboard Cite

Addressing environmental degradation and ensuring environmental sustainability are inextricably linked to all methods of reducing volatile organic compounds (VOCs) from the environment. A packed column air stripper is a typical example of such technologies for the removal of VOCs from polluted water. The present review is devoted to the applications of a packed column air stripper and, in comparison with previous reviews, presents further elaborations and new information on topics such as modeling and simulation of the dynamic behavior of the air stripping process in a packed column air stripper. The paper observed that a knowledge gap still exists in the synthesis of this knowledge to formulate practically applicable mathematical relationships to describe the process generally. Therefore, further researches are still required in the area of air stripper performance optimization, particularly in the development of a mathematical model and the optimization of an air stripper using a statistical experimental design method. Such a determination is critical to the understanding of the interactive effect of process variables such as temperature, air-to-water (A/W) ratio, and height of packing on air stripper performance.

show abstract

Section: Factors Affecting Air Stripping In a Packed Column Air Strippermentioning

confidence: 94%