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Treatment of a sanitary landfill leachate using combined solar photo-Fenton and biological immobilized biomass reactor at a pilot scale.
Water Res. 2011 Apr; 45(8):2647-58.WR

Abstract

A solar photo-Fenton process combined with a biological nitrification and denitrification system is proposed for the decontamination of a landfill leachate in a pilot plant using photocatalytic (4.16 m(2) of Compound Parabolic Collectors - CPCs) and biological systems (immobilized biomass reactor). The optimum iron concentration for the photo-Fenton reaction of the leachate is 60 mg Fe(2+) L(-1). The organic carbon degradation follows a first-order reaction kinetics (k = 0.020 L kJ(UV)(-1), r(0) = 12.5 mg kJ(UV)(-1)) with a H(2)O(2) consumption rate of 3.0 mmol H(2)O(2) kJ(UV)(-1). Complete removal of ammonium, nitrates and nitrites of the photo-pre-treated leachate was achieved by biological denitrification and nitrification, after previous neutralization/sedimentation of iron sludge (40 mL of iron sludge per liter of photo-treated leachate after 3 h of sedimentation). The optimum C/N ratio obtained for the denitrification reaction was 2.8 mg CH(3)OH per mg N-NO(3)(-), consuming 7.9 g/8.2 mL of commercial methanol per liter of leachate. The maximum nitrification rate obtained was 68 mg N-NH(4)(+) per day, consuming 33 mmol (1.3 g) of NaOH per liter during nitrification and 27.5 mmol of H(2)SO(4) per liter during denitrification. The optimal phototreatment energy estimated to reach a biodegradable effluent, considering Zahn-Wellens, respirometry and biological oxidation tests, at pilot plant scale, is 29.2 kJ(UV) L(-1) (3.3 h of photo-Fenton at a constant solar UV power of 30 W m(-2)), consuming 90 mM of H(2)O(2) when used in excess, which means almost 57% mineralization of the leachate, 57% reduction of polyphenols concentration and 86% reduction of aromatic content.

Authors+Show Affiliations

LSRE - Laboratory of Separation and Reaction Engineering, Departamento de Engenharia Química, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal. vilar@fe.up.ptNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21411117

Citation

Vilar, Vítor J P., et al. "Treatment of a Sanitary Landfill Leachate Using Combined Solar photo-Fenton and Biological Immobilized Biomass Reactor at a Pilot Scale." Water Research, vol. 45, no. 8, 2011, pp. 2647-58.
Vilar VJ, Rocha EM, Mota FS, et al. Treatment of a sanitary landfill leachate using combined solar photo-Fenton and biological immobilized biomass reactor at a pilot scale. Water Res. 2011;45(8):2647-58.
Vilar, V. J., Rocha, E. M., Mota, F. S., Fonseca, A., Saraiva, I., & Boaventura, R. A. (2011). Treatment of a sanitary landfill leachate using combined solar photo-Fenton and biological immobilized biomass reactor at a pilot scale. Water Research, 45(8), 2647-58. https://doi.org/10.1016/j.watres.2011.02.019
Vilar VJ, et al. Treatment of a Sanitary Landfill Leachate Using Combined Solar photo-Fenton and Biological Immobilized Biomass Reactor at a Pilot Scale. Water Res. 2011;45(8):2647-58. PubMed PMID: 21411117.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Treatment of a sanitary landfill leachate using combined solar photo-Fenton and biological immobilized biomass reactor at a pilot scale. AU - Vilar,Vítor J P, AU - Rocha,Elisangela M R, AU - Mota,Francisco S, AU - Fonseca,Amélia, AU - Saraiva,Isabel, AU - Boaventura,Rui A R, Y1 - 2011/02/22/ PY - 2010/12/20/received PY - 2011/02/07/revised PY - 2011/02/14/accepted PY - 2011/3/18/entrez PY - 2011/3/18/pubmed PY - 2011/6/15/medline SP - 2647 EP - 58 JF - Water research JO - Water Res VL - 45 IS - 8 N2 - A solar photo-Fenton process combined with a biological nitrification and denitrification system is proposed for the decontamination of a landfill leachate in a pilot plant using photocatalytic (4.16 m(2) of Compound Parabolic Collectors - CPCs) and biological systems (immobilized biomass reactor). The optimum iron concentration for the photo-Fenton reaction of the leachate is 60 mg Fe(2+) L(-1). The organic carbon degradation follows a first-order reaction kinetics (k = 0.020 L kJ(UV)(-1), r(0) = 12.5 mg kJ(UV)(-1)) with a H(2)O(2) consumption rate of 3.0 mmol H(2)O(2) kJ(UV)(-1). Complete removal of ammonium, nitrates and nitrites of the photo-pre-treated leachate was achieved by biological denitrification and nitrification, after previous neutralization/sedimentation of iron sludge (40 mL of iron sludge per liter of photo-treated leachate after 3 h of sedimentation). The optimum C/N ratio obtained for the denitrification reaction was 2.8 mg CH(3)OH per mg N-NO(3)(-), consuming 7.9 g/8.2 mL of commercial methanol per liter of leachate. The maximum nitrification rate obtained was 68 mg N-NH(4)(+) per day, consuming 33 mmol (1.3 g) of NaOH per liter during nitrification and 27.5 mmol of H(2)SO(4) per liter during denitrification. The optimal phototreatment energy estimated to reach a biodegradable effluent, considering Zahn-Wellens, respirometry and biological oxidation tests, at pilot plant scale, is 29.2 kJ(UV) L(-1) (3.3 h of photo-Fenton at a constant solar UV power of 30 W m(-2)), consuming 90 mM of H(2)O(2) when used in excess, which means almost 57% mineralization of the leachate, 57% reduction of polyphenols concentration and 86% reduction of aromatic content. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/21411117/Treatment_of_a_sanitary_landfill_leachate_using_combined_solar_photo_Fenton_and_biological_immobilized_biomass_reactor_at_a_pilot_scale_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(11)00075-3 DB - PRIME DP - Unbound Medicine ER -