Ammonia removal from landfill leachate by air stripping and absorption

Autor(es)

Ferraz, Fernanda M. ^[1] ; Povinelli, Jurandyr ^[1] ; Vieira, Eny Maria ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hydraul & Sanitat, Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Chem Inst, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL TECHNOLOGY; v. 34, n. 15, p. 2317-2326, AUG 1 2013.
• Citações Web of Science: 32

Resumo

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)

• Processo FAPESP: 11/50627-4 - Estudo de tratabilidade de lixiviados de aterros sanitarios - enfase no tratamento consorciado com esgoto sanitario em sistemas aerobios.
• Beneficiário: Fernanda de Matos Ferraz
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/51955-2 - Estudo de tratabilidade de lixiviados de aterros sanitários: ênfase no tratamento consorciado com esgoto sanitário em sistemas aeróbios
• Beneficiário: Jurandyr Povinelli
• Linha de fomento: Auxílio à Pesquisa - Regular