*This article may have affiliate links, which means we may receive commissions if you choose to purchase through links we provide (at no extra cost to you). For more details, please read our privacy policy/affiliate disclosure. Thank you for supporting the work we put into this blog!

Air strip­ping is the trans­fer­ring of volatile com­po­nents of a liq­uid into an air stream. It is a envi­ron­men­tal engi­neer­ing tech­nol­o­gy used for the purifi­ca­tion of ground­wa­ters and waste­waters con­tain­ing volatile com­pounds. Volatile com­pounds have rel­a­tive­ly high vapor pres­sure and low aque­ous sol­u­bil­i­ty char­ac­ter­ized by the compound’s Hen­ry’s law coef­fi­cient, which is the ratio of the con­cen­tra­tion in air that is in equi­lib­ri­um with its con­cen­tra­tion in water. Pol­lu­tants with rel­a­tive­ly high Henry’s Law coef­fi­cients can be eco­nom­i­cal­ly stripped from water. These include BTEX com­pounds (ben­zene, toluene, eth­yl­ben­zene, and xylene found in gaso­line, and sol­vents includ­ing trichloroeth­yl­ene and tetra­chloroeth­yl­ene. Ammo­nia can also be stripped from waste­waters and liq­uid diges­tates (often requir­ing pH adjust­ment pri­or to strip­ping). Since Henry’s law coef­fi­cient increas­es with tem­per­a­ture, strip­ping is eas­i­er at warmer temperatures.