1. Md.N.I. Siddique, Z.Ab. Wahid, Achievements and perspectives of anaerobic co-digestion: a review, J. Clean. Prod., 194 (2018) 359–371.
  2. H. Takeda, Cell wall dugars of some Scenedesmus species, Phytochemistry, 42 (1996) 673–675.
  3. H. Carrère, C. Dumas, A. Battimelli, D.J. Batstone, J.P. Delgenès, J.P. Steyer, I. Ferrer, Pretreatment methods to improve sludge anaerobic degradability: a review, J. Hazard. Mater., 183 (2010) 1–15.
  4. H. Carrère, G. Antonopoulou, R. Affes, F. Passos, A. Battimelli, G. Lyberatos, I. Ferrer, Review of feedstock pretreatment strategies for improved anaerobic digestion: from lab-scale research to full-scale application, Bioresour. Technol., 199 (2016) 386–397.
  5. F. Passos, E. Uggetti, H. Carrère, I. Ferrer, Pretreatment of microalgae to improve biogas production: a review, Bioresour. Technol., 172 (2014) 403–412.
  6. F. Passos, J. Carretero, I. Ferrer, Comparing pretreatment methods for improving microalgae anaerobic digestion: thermal, hydrothermal, microwave and ultrasound, Chem. Eng. J., 279 (2015) 667–672.
  7. E. Jankowska, A.K. Sahu, P. Piotr Oleskowicz-Popiel, Biogas from microalgae: review on microalgae’s cultivation, harvesting and pretreatment for anaerobic digestion, Renew. Sustain. Energy Rev., 75 (2017) 692–702.
  8. O. Córdova, J. Santis, G. Ruiz-Fillipi, M.E. Zuñig, F.G. Fermos, R. Chamy, Microalga digestive pretreatment for increasing biogas production, Renew, Sustain. Energy Rev., 22 (2018) 2806–2813.
  9. APHA, AWWA, WEF, Standard Methods for Examination of Water and Wastewater, 22nd ed. American Public Health Association, Washington, 2012, 1360 p.
  10. J.B. van Lier, N. Mahmoud, G. Zeeman, Chapter 16, Biological Wastewater Treatment: Principles, Modeling and Design, M. Henze, M.C.M. van Loosdrecht, G.A. Ekama, D. Brdjanovic, Eds., Anaerobic Wastewater Treatment, IWA Publishers, London, 2008.
  11. M. Dohanyos, J. Zabranska, P. Jenicek, Enhancement of sludge anaerobic digestion by using of a special thickening centrifuge, Water Sci. Technol., 36 (1997) 145–153.
  12. B. Ruffino, G. Campo, A. Cerutti, M.C. Zanetti, E. Lorenzi, G. Scibilia, G. Genon, Preliminary technical and economic analysis of alkali and low temperature thermo-alkali pretreatments for the anaerobic digestion of waste activated sludge, Waste Biomass Valor, 7 (2016) 667–675.
  13. I. Angelidaki, M. Alves, D. Bolzonella, L. Borzacconi, J.L. Campos, A.J. Guwy, S. Kalyuzhnyi, P. Jenicek, J.B. van Lier, Defining the biomethane potential (BMP) of solid organic wastes and energy crops: a proposed protocol for batch assays, Water Sci. Technol., 52 (2009) 927–934.
  14. V.A. Riggio, G. Campo, B. Ruffino, A. Cerutti, D. Panepinto, M.C. Zanetti, Evaluation of Thermal, and Thermal Alkali Pretreatments on Monospecific Micro-Algal Biomass to Improve Anaerobic Biogas Production, 6th International Symposium on Energy From Biomass and Waste, Venice, 2016.
  15. VDI Standard, VDI 4630, Fermentation of Organic Materials. Characterization of the Substrate, Sampling, Collection of Material Data, Fermentation Test, 2006, 92 pp.
  16. G. Campo, A. Cerutti, M.C. Zanetti, G. Scibilia, E. Lorenzi, B. Ruffino, Enhancement of waste activated sludge (WAS) anaerobic digestion by means of pre- and intermediate treatments. Technical and economic analysis at a full-scale WWTP, J. Environ. Manage., 216 (2017) 372–382.
  17. G. Campo, A. Cerutti, M.C. Zanetti, G. Scibilia, E. Lorenzi, B. Ruffino, Pretreatments and intermediate hybrid treatments for the improvement of the anaerobic digestion of sewage sludge: preliminary results, J. Environ. Eng., 143 (2017) 1–7.
  18. F. Ometto, G. Quiroga, P. Psenicka, R. Whitton, B. Jefferson, R. Villa, Impacts of microalgae pre-treatments for improved anaerobic digestion: thermal treatment, thermal hydrolysis, ultrasound and enzymatic hydrolysis, Water Res., 65 (2014) 350–361.
  19. L. Mendez, A. Mahdy, M. Ballesteros, C. Gonzalez-Fernandez, Methane production of thermally pretreated Chlorella vulgaris and Scenedesmus sp. biomass at increasing biomass loads, Appl. Energy, 129 (2014) 238–242.
  20. A. Mahdy, L. Mendez, M. Ballesteros, C. Gonzalez-Fernandez, Autohydrolysis and alkaline pretreatment effect on Chlorella vulgaris and Scenedesmus sp. methane production. Energy, 78 (2014) 48–52.