Biogas Production: Pretreatment Methods in Anaerobic by Ackmez Mudhoo

By Ackmez Mudhoo

This quantity covers the main state of the art pretreatment techniques getting used and studied this day for the construction of biogas in the course of anaerobic digestion tactics utilizing diversified feedstocks, within the most productive and in your price range equipment possible.  As an more and more very important piece of the "energy pie," biogas and different biofuels are getting used progressively more world wide in each possible zone of and will be a partial solution to the power challenge and the removing of worldwide warming.

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Therefore, the application of ultrasound may have a great potential to be used before actual treatment of residues. Several reviews about the role of ultrasound in the pretreatment of residues before anaerobic digestion have been recently published and they provide 12 BIOGAS PRODUCTION a deeper view of the mechanisms by which ultrasound may be useful as a pretreatment technique [93-96]. There are also several recent applications of ultrasound for the pretreatment of wide range of residues. It has been reported, for example, that ultrasonic pretreatment increased daily biogas production, methane production and significantly reduced volatile solids during the anaerobic digestion of waste activated sludge.

J. C. Y. Lin. International Journal of Hydrogen Energy, Vol. 35(24), p. 13445,2010. 40. T. Forster-Carneiro, M. I. Romero. Biomass & Bioenergy, Vol. 34, p. 1805, 2010. 41. T. Forster-Carneiro, M. I. Romero. Bioresource Technology, Vol. 98, p. 3354,2007. 42. A. -Güelfo, C. Alvarez-Gallego, D. I. Romero Garcia. Bioresource Technology, Vol. 102(2), p. 606,2011. 43. H. Carrere, C. Dumas, A. J. P. P. Steyer, I. Ferrer. Journal of Hazardous Materials, Vol. 183(1-3), p. 1,2010. 44. H. Bouallagui, Y. Touhami, R.

The thermochemical pretreatment, is a physical-chemical pretreatment and was studied for municipal solid waste anaerobic digestion by Owen [124]. The results showed a slight increase of COD (chemical oxygen demand) soluble of municipal solid waste when applied at temperatures between 150-225°C, markedly decreasing the hydrolysis above 225°C. Also three chemicals pretreatment (NaOH, ammonia, and urea) were reported by Zhong and collaborates [29]. NaOH, ammonia, and urea were added into the solution of corn straw in the flasks (1 litre) at concentrations 8%, 5%, and 4% (wt%), respectively And the resulting moisture contents were 48%, 22%, and 38% for the three groups, respectively.

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