Leachate/domestic wastewater aerobic co-treatment: A pilot-scale study using multivariate analysis

Autor(es)

Ferraz, F. M. ^[1] ; Bruni, A. T. ^[2] ; Povinelli, J. ^[1] ; Vieira, E. M. ^[3]

Afiliação do(s) autor(es)

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

^[2] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-13566590 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13566590 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Environmental Management; v. 166, p. 414-419, JAN 15 2016.
• Citações Web of Science: 8

Resumo

Multivariate analysis was used to identify the variables affecting the performance of pilot-scale activated sludge (AS) reactors treating old leachate from a landfill and from domestic wastewater. Raw leachate was pre-treated using air stripping to partially remove the total ammoniacal nitrogen (TAN). The control AS reactor (AS-0%) was loaded only with domestic wastewater, whereas the other reactor was loaded with mixtures containing leachate at volumetric ratios of 2 and 5%. The best removal efficiencies were obtained for a ratio of 2%, as follows: 70 +/- 4% for total suspended solids (TSS), 70 +/- 3% for soluble chemical oxygen demand (SCOD), 70 4% for dissolved organic carbon (DOC), and 51 +/- 9% for the leachate slowly biodegradable organic matter (SBOM). Fourier transform infrared (FTIR) spectroscopic analysis confirmed that most of the SBOM was removed by partial biodegradation rather than dilution or adsorption of organics in the sludge. Nitrification was approximately 80% in the AS-0% and AS-2% reactors. No significant accumulation of heavy metals was observed for any of the tested volumetric ratios. Principal component analysis (PCA) and partial least squares (PLS) indicated that the data dimension could be reduced and that TAN, SCUD, DOC and nitrification efficiency were the main variables that affected the performance of the AS reactors. (c) 2015 Elsevier Ltd. All rights reserved. (AU)

• 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
• 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