▁carbon ates , ▁and ▁in ▁many ▁cases ▁a ▁high ▁fraction ▁of ▁heavy ▁ban anas ▁are ▁the ▁best ▁way ▁organ ic ▁ac ids . ▁ ▁Tre at ment ▁techn ologies ▁Sp ent ▁ca ust ics ▁are ▁mal odor ous ▁waste w aters ▁that ▁are ▁difficult ▁to ▁treat ▁in ▁conventional ▁waste water ▁processes . ▁Typ ically ▁the ▁material ▁is ▁dis posed ▁of ▁by ▁high ▁dil ution ▁with ▁bi ot re at ment , ▁deep ▁well ▁injection , ▁inc iner ation , ▁wet ▁air ▁ox id ation , ▁Hum id ▁Pero x ide ▁Ox id ation ▁or ▁other ▁special ity ▁processes . ▁Most ▁eth yl ene ▁spent ▁ca ust ics ▁are ▁dis posed ▁of ▁through ▁wet ▁air ▁ox id ation . ▁ ▁References ▁Su are z , ▁F . ▁" Pl uses ▁and ▁Min uses ▁of ▁Ca ust ic ▁Tre ating ", ▁H ydro car bon ▁Process ing , ▁pp ▁ 1 1 7 – 1 2 3 , ▁Oct ▁ 1 9 9 6 . ▁M aug ans , ▁C .; ▁Ell is , ▁C . ▁" Age ▁Old ▁Solution ▁for ▁Today ' s ▁SO 2 ▁and ▁NO x ", ▁Pol l ution ▁Engineering , ▁April ▁ 2 0 0 4 . ▁Carlos ▁T .; ▁M aug ans , ▁C . ▁" W et ▁Air ▁Ox id ation ▁of ▁Re fin ery ▁Sp ent ▁Ca ust ic : ▁A ▁Re fin ery ▁Case ▁Study ", ▁N P RA ▁Conference , ▁San ▁Antonio , ▁T X , ▁September ▁ 2 0 0 0 . ▁ ▁W