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Water, Air, & Soil Pollution

, Volume 223, Issue 2, pp 591–598 | Cite as

Evaluation of Non-Conventional Coagulants to Remove Turbidity from Water

  • R. Devesa-Rey
  • G. Bustos
  • J. M. Cruz
  • A. B. Moldes
Article

Abstract

Coagulation and flocculation are basic chemical engineering operations employed to remove suspended solids from water. The growing concern for environmental and ecological issues warrants the use of the biodegradable flocculants in wastewater and industrial effluent treatment. In this work, unconventional coagulant, namely lactic acid, calcium lactate, sodium lactate, and citric acid were studied in comparison with AlCl3, a usual coagulant widely employed to remove water turbidity. It was observed that lactic acid and calcium lactate were able to reduce the water turbidity similarly to AlCl3. This fact can be very interesting because lactic acid salts can be produced by biotechnological process, and contrarily to aluminium salts, they are biodegradable, reducing the risk for human and animal’s health.

Keyword

Total suspended solids Coagulation Flocculation Lactic acid Calcium lactate 

Notes

Acknowledgements

Rosa Devesa-Rey gratefully acknowledges the financial support from the Ángeles Alvariño Program and financial support of the Xunta de Galicia.

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • R. Devesa-Rey
    • 1
  • G. Bustos
    • 2
  • J. M. Cruz
    • 1
  • A. B. Moldes
    • 1
  1. 1.Departamento Ingeniería Química, E.T.S. Ingenieros Industriales. Campus As Lagoas, MarcosendeUniversidad de VigoVigoSpain
  2. 2.Unidad Académica Multidisciplinaria de Mante, Área de Ingeniería Bioquímica IndustrialUniversidad Autónoma de TamaulipasManteMexico

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