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.

中文翻译：

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沼气生产前牛粪共青贮：发酵促进剂和抑制剂对生物质和甲烷保存的影响

摘要 在实验室规模的 4 个月内，评估了甲酸和葡萄糖添加对牛粪与稻草共青贮的影响。没有添加剂的原料失去了 67% 的甲烷潜力，可用于长期青贮。这主要是由于缺乏水溶性碳水化合物和牛粪的高产甲烷活性。共基质的使用增强了青贮过程中的生物量和能源节约。将牛粪与葡萄糖（100 g/kg 原料）共青贮可获得最佳结果。在这种情况下，乳酸生产量很大，这使得生物质酸化，抑制氨排放，并在 4 个月后完全保留甲烷潜力。因此，在现场规模的存储中，与富含糖的共基质共青贮似乎是优化牛粪保存最有效的方法。这种有前途的技术的应用将对必须长期储存牛粪的农业沼气厂的甲烷产量产生重大影响。