Valorization of Solid Wastes from Biomethanisation of Pig Breeding Effluents

Duarte, E. A.; Mendes, B.; Oliveira, J. S.

doi:10.2166/wst.1992.0670

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Research Article| November 01 1992

Valorization of Solid Wastes from Biomethanisation of Pig Breeding Effluents

E. A. Duarte;

E. A. Duarte

*Section of Agricultural Chemistry, I.S.A. Tapada da Ajuda, 1200 Lisbon, Portugal

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B. Mendes;

B. Mendes

**Group of Disciplines on Aquatic Ecology, Faculty of Sciences and Technology, New University of Lisbon, 2825 M. Caparica, Portugal

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J. S. Oliveira

**Group of Disciplines on Aquatic Ecology, Faculty of Sciences and Technology, New University of Lisbon, 2825 M. Caparica, Portugal

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Water Sci Technol (1992) 26 (9-11): 2097–2100.

https://doi.org/10.2166/wst.1992.0670

The biomethanisation of pig wastes produces a significant amount of biogas and reduces the organic load of the effluent. This effluent contains an important amount of nutrients that may be recuperated by coagulation-floculation, with cationic polymers. The optimization of this process was studied and the characteristics of the solid wastes produced determined. This product is a typical protein concentrate whose value is discussed, as well as possible reutilizations for feeding purposes.

Pig wastes, biomethanisation, cationic polymer, coagulation-floculation, protein concentrate, reutilization

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