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Bioresour Technol. 2017 Oct;241:10-20. doi: 10.1016/j.biortech.2017.05.054. Epub 2017 May 12.

Alkaline and oxidative pretreatments for the anaerobic digestion of cow manure and maize straw: Factors influencing the process and preliminary economic viability of an industrial application.

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ProCycla SL, Pau Casals 18, 4-4, 08240 Manresa, Spain.
ProCycla SL, Pau Casals 18, 4-4, 08240 Manresa, Spain. Electronic address:
Ainia Centro Tecnológico, Benjamin Franklin 5-11, E46980 Paterna, Spain.
ProCycla SPA, Gral Eugenio Garzón 6561, Vitacura 7640274, Región Metropolitana, Chile.


This paper studies the application of calcium oxide (CaO), peracetic acid (PAA) and a combination of both in order to reduce lignin content and increase biogas potential of cow manure and maize straw. Changes in organic matter were mainly affected by the type of reagent use and the dosage, with minimum influence of exposure time and dilution. Changes in pH may limit the application of chemicals. Increase in biogas production with a combination of CaO and PAA, and separate application of PAA and CaO was 156.5%, 39.1% and 26.1% for cow manure and 125%, 137.5% and 37.5% for maize straw, respectively, compared to unpretreated samples. Pretreating cow manure with the aforementioned reagents does not increase the profitability of a biogas plant due mainly to the increase in operational costs from the intensive use of chemicals.


Anaerobic digestion; Biogas; Chemical pretreatment; Lignocellulose; Preliminary financial study

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