Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH

E. Ortega-Gómez, B. Esteban García, M.M. Ballesteros Martín, P Fernandez Ibanez, J.A. Sánchez Pérez

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Enterococcus faecalis inactivation was carried out by solar photo-Fenton at initial neutral pH in com- pound parabolic collectors with 20 mg L−1 of Fe2+ and 50 mg L−1 of H2 O2 in different matrices [saline solution (0.9% NaCl), saline solution with resorcinol and a simulated secondary effluent from a munic- ipal wastewater treatment plant (SEWWTP)]. The effects of mechanical stress, acidic pH, solar light, solar light/H2O2 and Fenton reaction were determined. Sunlight led to a 2-log bacterial decrease while H2 O2 (50 mg L−1 ) with solar light decreased E. faecalis concentration from 106 to 102 CFU mL−1 and 1-log for Fenton reaction after 100 min of treatment. The chemical composition of water matrix was shown to have a marked influence on E. faecalis inactivation by solar photo-Fenton. The detection limit was reached within 55 min in the saline solution. The presence of resorcinol (Dissolved Organic Carbon: 10 mg L−1 ) reduced the treatment time by 10 min; whilst a 15 min reduction was observed in SEWWTP and the final pH returned to neutral. E. faecalis inactivation results were satisfactorily fitted to a modified version of the classical Chick–Watson model. The kinetic constants were 0.193 ± 0.005 min−1 for saline solution, 0.294±0.016min−1 forsalinesolutionwithresorcinol,and0.330±0.019min−1 forSEWWTP.
LanguageEnglish
Pages195-200
JournalCatalysis Today
Volume209
DOIs
Publication statusAccepted/In press - 12 Mar 2013

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Sodium Chloride
Wastewater treatment
Effluents
Organic carbon
Kinetics
Water
Chemical analysis
resorcinol

Keywords

  • Disinfection
  • Enterococcus faecalis
  • Neutral pH Photo-Fenton
  • Wastewater
  • Resorcinol

Cite this

Ortega-Gómez, E. ; Esteban García, B. ; Ballesteros Martín, M.M. ; Fernandez Ibanez, P ; Sánchez Pérez, J.A. / Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH. 2013 ; Vol. 209. pp. 195-200.
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abstract = "Enterococcus faecalis inactivation was carried out by solar photo-Fenton at initial neutral pH in com- pound parabolic collectors with 20 mg L−1 of Fe2+ and 50 mg L−1 of H2 O2 in different matrices [saline solution (0.9{\%} NaCl), saline solution with resorcinol and a simulated secondary effluent from a munic- ipal wastewater treatment plant (SEWWTP)]. The effects of mechanical stress, acidic pH, solar light, solar light/H2O2 and Fenton reaction were determined. Sunlight led to a 2-log bacterial decrease while H2 O2 (50 mg L−1 ) with solar light decreased E. faecalis concentration from 106 to 102 CFU mL−1 and 1-log for Fenton reaction after 100 min of treatment. The chemical composition of water matrix was shown to have a marked influence on E. faecalis inactivation by solar photo-Fenton. The detection limit was reached within 55 min in the saline solution. The presence of resorcinol (Dissolved Organic Carbon: 10 mg L−1 ) reduced the treatment time by 10 min; whilst a 15 min reduction was observed in SEWWTP and the final pH returned to neutral. E. faecalis inactivation results were satisfactorily fitted to a modified version of the classical Chick–Watson model. The kinetic constants were 0.193 ± 0.005 min−1 for saline solution, 0.294±0.016min−1 forsalinesolutionwithresorcinol,and0.330±0.019min−1 forSEWWTP.",
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Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH. / Ortega-Gómez, E.; Esteban García, B.; Ballesteros Martín, M.M.; Fernandez Ibanez, P; Sánchez Pérez, J.A.

Vol. 209, 12.03.2013, p. 195-200.

Research output: Contribution to journalArticle

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T1 - Inactivation of Enterococcus faecalis in simulated wastewater treatment plant effluent by solar photo-Fenton at initial neutral pH

AU - Ortega-Gómez, E.

AU - Esteban García, B.

AU - Ballesteros Martín, M.M.

AU - Fernandez Ibanez, P

AU - Sánchez Pérez, J.A.

PY - 2013/3/12

Y1 - 2013/3/12

N2 - Enterococcus faecalis inactivation was carried out by solar photo-Fenton at initial neutral pH in com- pound parabolic collectors with 20 mg L−1 of Fe2+ and 50 mg L−1 of H2 O2 in different matrices [saline solution (0.9% NaCl), saline solution with resorcinol and a simulated secondary effluent from a munic- ipal wastewater treatment plant (SEWWTP)]. The effects of mechanical stress, acidic pH, solar light, solar light/H2O2 and Fenton reaction were determined. Sunlight led to a 2-log bacterial decrease while H2 O2 (50 mg L−1 ) with solar light decreased E. faecalis concentration from 106 to 102 CFU mL−1 and 1-log for Fenton reaction after 100 min of treatment. The chemical composition of water matrix was shown to have a marked influence on E. faecalis inactivation by solar photo-Fenton. The detection limit was reached within 55 min in the saline solution. The presence of resorcinol (Dissolved Organic Carbon: 10 mg L−1 ) reduced the treatment time by 10 min; whilst a 15 min reduction was observed in SEWWTP and the final pH returned to neutral. E. faecalis inactivation results were satisfactorily fitted to a modified version of the classical Chick–Watson model. The kinetic constants were 0.193 ± 0.005 min−1 for saline solution, 0.294±0.016min−1 forsalinesolutionwithresorcinol,and0.330±0.019min−1 forSEWWTP.

AB - Enterococcus faecalis inactivation was carried out by solar photo-Fenton at initial neutral pH in com- pound parabolic collectors with 20 mg L−1 of Fe2+ and 50 mg L−1 of H2 O2 in different matrices [saline solution (0.9% NaCl), saline solution with resorcinol and a simulated secondary effluent from a munic- ipal wastewater treatment plant (SEWWTP)]. The effects of mechanical stress, acidic pH, solar light, solar light/H2O2 and Fenton reaction were determined. Sunlight led to a 2-log bacterial decrease while H2 O2 (50 mg L−1 ) with solar light decreased E. faecalis concentration from 106 to 102 CFU mL−1 and 1-log for Fenton reaction after 100 min of treatment. The chemical composition of water matrix was shown to have a marked influence on E. faecalis inactivation by solar photo-Fenton. The detection limit was reached within 55 min in the saline solution. The presence of resorcinol (Dissolved Organic Carbon: 10 mg L−1 ) reduced the treatment time by 10 min; whilst a 15 min reduction was observed in SEWWTP and the final pH returned to neutral. E. faecalis inactivation results were satisfactorily fitted to a modified version of the classical Chick–Watson model. The kinetic constants were 0.193 ± 0.005 min−1 for saline solution, 0.294±0.016min−1 forsalinesolutionwithresorcinol,and0.330±0.019min−1 forSEWWTP.

KW - Disinfection

KW - Enterococcus faecalis

KW - Neutral pH Photo-Fenton

KW - Wastewater

KW - Resorcinol

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M3 - Article

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