Co-ensiling of cattle manure before biogas production: Effects of fermentation stimulants and inhibitors on biomass and methane preservation. (June 2018)

• Record Type: Journal Article
• Authors: Franco, Rúben Teixeira; Buffière, Pierre; Bayard, Rémy
• Is Part Of: Renewable energy. Volume 121(2018)
• Page Start: 315
• Page End: 323
• Publication Date: 2018-06
• Subjects: Cattle manure -- Additives -- Storage -- Ensiling -- Anaerobic digestion -- Methane potential; AA acetic acid -- AD anaerobic digestion -- ADF acid detergent fiber -- ADL acid detergent lignin -- BMP biochemical methane potential -- BU butyric acid -- CEL cellulose -- COD chemical oxygen demand -- FA formic acid -- HEM hemicellulose -- LA lactic acid -- LAB lactic acid bacteria -- LIG lignin -- NDF neutral detergent fiber -- NH3-N ammonia nitrogen -- TKN total Kjeldahl nitrogen -- TS total solids -- VS volatile solids -- WSC water soluble carbohydrates -- VFA volatile fatty acids; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2018.01.035
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: 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. Highlights: Ensiling of cattle manure with straw led to 67% methane potential losses. Ammonia emissions during ensiling were minimized with the use of co-substrates. Formic acid addition limited energy losses to 25% during ensiling. Full preservation of methane potential occurred for co-ensiling with 10% of glucose.