Ammonia removal from landfill leachate by struvite formation: an alarming concentration of phosphorus in the treated effluent

Autor(es)

Tonetti, Adriano Luiz ; de Camargo, Cristal Coser ; Guimaraes, Jose Roberto

• Tipo de documento: Artigo Científico
• Fonte: WATER SCIENCE AND TECHNOLOGY; v. 74, n. 12, p. 2970-2977, DEC 2016.
• Citações Web of Science: 0

Resumo

This study examined the removal of ammonia nitrogen from the leachate of a landfill site using the chemical precipitation of struvite (MgNH4PO4 center dot 6H(2)O). This procedure achieved a reduction in the ammonia concentration that was higher than 99% when the molar ratio of 1.8:1.0:1.4 for Mg-2(+):NH4+:PO43- was adopted. The metal concentration found in the precipitate formed was lower than the limits set by Brazilian and American regulations (CONAMA 375/2006 and US EPA, 40 CFR 503.1993). This demonstrates the potential use for this practice in agriculture. However, the effluent obtained from the tests presented a phosphorus concentration higher than the one in the raw leachate. This shows that removing this compound from the effluent must be further studied. Otherwise, adopting the chemical precipitation of ammonia by the formation of struvite may become unfeasible. (AU)

• Processo FAPESP: 11/21919-7 - Aplicação em escala real e avaliação de um sistema de baixo custo para o tratamento de esgotos de comunidades isoladas
• Beneficiário: Adriano Luiz Tonetti
• Modalidade de apoio: Auxílio à Pesquisa - Regular