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Energies 2017, 10(6), 765; doi:10.3390/en10060765

Treatment of Slaughterhouse Waste Water Mixed with Serum from Lacteal Industry of Extremadura in Spain to Produce Clean Energy

School of Industrial Engineering, University of Extremadura, Avda. de Elvas s/n, 06006 Badajoz, Spain
School of Mechanical and Electrical Engineering, The University of Southern Queensland, Toowoomba 4350, QLD, Australia
Author to whom correspondence should be addressed.
Academic Editor: Xidong Wang
Received: 3 April 2017 / Revised: 12 May 2017 / Accepted: 24 May 2017 / Published: 31 May 2017
(This article belongs to the Special Issue Energy and Water, Current and Future Crisis)
View Full-Text   |   Download PDF [1670 KB, uploaded 2 June 2017]   |  


The problem of slaughterhouse waste water can be resolved by mixing it with serum from lacteal industry to produce a biogas. The effect of serum addition on the anaerobic co-digestion of solid and liquid slaughterhouse waste has been studied. The experimental device consisted of a continuous digester by recirculation of biogas produced in the anaerobic digestion. The input effluent was a mixture of slaughterhouse waste from Badajoz city (Spain) and animal serum in a proportion of 20%. The anaerobic digestion was developed in a complete mixing continuous digester with a capacity of 6.2 L at 37 °C and a feed rate of 350 mL/day. From the results obtained for the co-digestion of the feeding effluent of the slaughterhouse waste, without and with serum added, in the same operating conditions, comparative data about the biological depuration and biogas production have been obtained. A 10 L biogas production was obtained with the slaughterhouse waste and 18 L with the slaughterhouse waste with serum added. In conclusion, the highest energetic yield (97.52% higher) was obtained in the second case, due to the positive action of catalytic enzymes present in the animal serum. View Full-Text
Keywords: slaughterhouse waste water; treatment; anaerobic biodigestion; lacteal serum slaughterhouse waste water; treatment; anaerobic biodigestion; lacteal serum

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MDPI and ACS Style

Marcos, A.C.; Al-Kassir, A.; Cuadros, F.; Yusaf, T. Treatment of Slaughterhouse Waste Water Mixed with Serum from Lacteal Industry of Extremadura in Spain to Produce Clean Energy. Energies 2017, 10, 765.

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