Ferraz, Fernanda M.
Vieira, Eny Maria
Total Authors: 3
 Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hydraul & Sanitat, Sao Carlos, SP - Brazil
 Univ Sao Paulo, Sao Carlos Chem Inst, Sao Carlos, SP - Brazil
Total Affiliations: 2
AUG 1 2013.
Web of Science Citations:
An old landfill leachate was pre-treated in a pilot-scale aerated packed tower operated in batch mode for total ammoniacal nitrogen (TAN) removal. The stripped ammonia was recovered with a 0.4molL(-1) H2SO4 solution, deionized water and tap water. Ca(OH)(2) (95% purity) or commercial hydrated lime was added to the raw leachate to adjust its pH to 11, causing removal of colour (82%) and heavy metals (70-90% for Zn, Fe and Mn). The 0.4molL(-1) H2SO4 solution was able to neutralize 80% of the stripped ammonia removed from 12L of leachate. The effectiveness of the neutralization of ammonia with deionized water was 75%. Treating 100L of leachate, the air stripping tower removed 88% of TAN after 72h of aeration, and 87% of the stripped ammonia was recovered in two 31L pilot-scale absorption units filled with 20L of tap water. (AU)