Co-ensiling of cattle manure before biogas production: Effects of fermentation stimulants and inhibitors on biomass and methane preservation

RENEWABLE ENERGY

卷:121

Article

Franco, Ruben Teixeira¹  Buffiere, Pierre¹  Bayard, Remy¹ 

[1] Univ Lyon, INSA Lyon, DEEP Lab, EA7429, F-69621 Villeurbanne, France

关键词: Cattle manure;    Additives;    Storage;    Ensiling;    Anaerobic digestion;    Methane potential;   

DOI  :  10.1016/j.renene.2018.01.035

来源: Elsevier

【 摘 要 】

The impact of formic acid and glucose addition on the co-ensiling of cattle manure with straw was assessed during 4 months at laboratory scale. Feedstock deprived of additives lost 67% of its methane potential for prolonged ensiling. This was mainly due to the lack of water-soluble carbohydrates and to the high methanogenic activity of cattle manure. The use of co-substrates enhanced biomass and energy conservation during ensiling. The best result was obtained for co-ensiling of cattle manure with glucose (100 g/kg of feedstock). For this condition, lactate production was extensive, which enabled biomass acidification, suppressed ammonia emissions and led to full preservation of methane potential after 4 months. Therefore, in field-scale storage, co-ensiling with a sugar-rich co-substrate appears to be the most resourceful method to optimize cattle manure preservation. Application of this promising technique will have a major impact on the methane yield of agricultural biogas plants where cattle manure has to be stored for long periods. (C) 2018 Elsevier Ltd. All rights reserved.

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