Aerobic co-treatment of landfill leachate and domestic wastewater - are slowly biodegradable organics removed or simply diluted?

Autor(es)

Campos, R. ^[1] ; Ferraz, F. M. ^[1] ; Vieira, E. M. ^[2] ; Povinelli, J. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Hidraul & Saneamento, BR-13566590 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: WATER SCIENCE AND TECHNOLOGY; v. 70, n. 12, p. 1941-1947, 2014.
• Citações Web of Science: 7

Resumo

This study investigated the co-treatment of landfill leachate/domestic wastewater in bench-scale activated sludge (AS) reactors to determine whether the slowly biodegradable organic matter (SBOM) was removed rather than diluted. The AS reactors were loaded with mixtures of raw leachate and leachate that was pretreated by air stripping. The tested volumetric ratios were 0%, 0.2%, 2% and 5%. For all of the tested conditions, the reactors performed better when pretreated leachate was used rather than raw leachate, and the best volumetric ratio was 2%. The following removals were obtained: 97% for the biochemical oxygen demand (BOD5,20), 79% for total suspended solids, 77% for dissolved organic carbon and 84% for soluble chemical oxygen demand. Most of the pretreated leachate SBOM (65%) was removed rather than diluted or adsorbed into the sludge, as confirmed by Fourier transform infrared (FTIR) spectroscopy analyses. (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
• Modalidade de apoio: 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
• Modalidade de apoio: Auxílio à Pesquisa - Regular