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Waste energy recovery improves price competitiveness of artificial forage from rapeseed straw

机译：废能源回收提高了菜籽秸秆人工饲料的价格竞争力

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Increasingly frequent droughts are causing repeated shortages of forage and are creating imbalances in the livestock economy in many parts of the world. More and more rapeseed is being cultivated for biodiesel production, and its straw has to be removed from fields to minimize disease vectors. Despite good drought resistance, rapeseed straw cannot replace forage because of its poor palatability. Our work objective was to design a pilot plant that would be the first of its kind to turn rapeseed straw into artificial forage on a commercial scale and would enable a first techno-economical assessment. Rapeseed straw is intracellularly disintegrated (by steam explosion technology which uses waste heat from a biogas station to minimize the energy demands) and subsequently enzymatically hydrolysed. A series of in vitro and in vivo analyses of nutrition quality were accompanied by a cost breakdown. The findings obtained in pilot scale dimensions revealed for the first time that rapeseed straw can be turned into artificial forage that has, according to the world standard forage price indicator, a relative feed value rated at the same level as alfalfa hay. However, despite energy savings, the cost of processing makes the cost of the artificial forage about 61% higher than conventional forage of the same quality. On the other hand, the potential for further reduction of production costs has been identified. It can be assumed that the price competitiveness can be achieved during extended periods of drought.[GRAPHICS]
机译：越来越频繁的干旱导致草料反复短缺，并在世界许多地区造成畜牧经济失衡。目前正在种植越来越多的油菜籽以生产生物柴油，必须将稻草从田间移开，以最大程度地减少病媒。尽管具有良好的抗旱性，但油菜籽秸秆由于其适口性差而不能代替草料。我们的工作目标是设计一个试验工厂，这将是首例将油菜籽秸秆以商业规模转化为人工饲料的工厂，并将进行首次技术经济评估。油菜籽秸秆在细胞内分解（通过蒸汽爆炸技术，该技术利用来自沼气站的废热来减少能源需求），然后进行酶水解。营养质量的一系列体外和体内分析伴随着成本细分。在中试规模的研究结果中首次发现，菜籽秸秆可以转变为人工饲料，根据世界标准的饲料价格指标，其相对饲料价值与苜蓿干草相同。但是，尽管节省了能源，但加工成本使人工草料的成本比相同质量的传统草料高出约61％。另一方面，已经确定了进一步降低生产成本的潜力。可以假定在长期干旱期间可以实现价格竞争力。[GRAPHICS]

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