Applied Biochemistry and Biotechnology

, Volume 184, Issue 4, pp 1200–1218 | Cite as

Anaerobic Digestion of Cattle Manure Influenced by Swirling Jet Induced Hydrodynamic Cavitation

  • Michela Langone
  • Mariangela Soldano
  • Claudio Fabbri
  • Francesco Pirozzi
  • Gianni Andreottola


In this work, a modified swirling jet-induced cavitation has been employed for increasing anaerobic digestion efficiency of cattle manure. The hydrodynamic cavitation (HC) treatment improved the organic matter solubilization and the anaerobic biodegradability of cattle manure. The degree of disintegration increased by 5.8, 8.9, and 15.8% after the HC treatment at 6.0, 7.0, and 8.0 bars, respectively. However, the HC treatment at 7.0 bars had better results in terms of methane production. This result may be attributed to the possible formation of toxic and refractory compounds at higher inlet pressures, which could inhibit the methanization process. Further, total Kjeldahl nitrogen content was found to decrease with increasing inlet pressures, as the pH and the turbulent mixing favored the ammonia stripping processes. HC treatment decreased the viscosity of the treated cattle manure, favoring the manure pumping and mixing. Considerations on the energy input due to the HC pre-treatment and the energy output due to the enhanced methane yield have been presented. A positive energy balance can be obtained looking at the improved operational practices in the anaerobic digesters after the implementation of the HC pre-treatment.


Ammonia stripping Anaerobic biodegradability Cattle manure Hydrodynamic cavitation Viscosity 



This work was supported by the Fondazione Caritro, Trento, Italy (Young Researcher, Grant 2015). The authors gratefully acknowledge the Officine Parisi S.r.l. (Riva del Garda, Trento, Italy), and Eng. D. C. Waubert de Puiseau for technical support, and the CRPA (Reggio Emilia, Italy) for their analytical support.

Compliance with Ethical Standards

Conflicts of Interest

The authors declare that they have no conflicts of interest.

Supplementary material

12010_2017_2612_MOESM1_ESM.docx (39 kb)
ESM 1 (DOCX 39 kb)


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© Springer Science+Business Media, LLC 2017

Authors and Affiliations

  1. 1.Department of Civil, Environmental and Mechanical EngineeringUniversity of TrentoTrentoItaly
  2. 2.CRPA - Research Centre on Animal ProductionReggio EmiliaItaly
  3. 3.Department of Civil, Architectural and Environmental EngineeringUniversity of Naples Federico IINaplesItaly

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