基于模拟的液体消化物循环再循环和尿素添加的优化,在小麦和牛共同消化小麦
Bomin Yuan1, Hendrik Etzold1, Arne Gröngröft1
1DBFZ Deutsches Biomasseforschungszentrum Gemeinnützige GmbH, Torgauer Str. 116, 04347, Leipzig, Germany.
Journal of environmental management
|January 9, 2026
概括
再循环液体消化剂和添加尿素可以显著提高农业系统中的沼气生产和利能力. 这种方法还大大减少了淡水需求,提高了沼气厂的可持续性.
科学领域:
- 农业科学 农业科学
- 环境工程 环境工程
- 生物化学工程 生物化学工程
背景情况:
- 农业残留物如小麦和牛的无氧共消化是废物利用的关键.
- 管理消化和优化生物气厂的效率,特别是甲产量和利能力,面临着持续的挑战.
研究的目的:
- 调查液体消化物循环 (LDR) 和尿素添加对生物气过程性能和经济可行性的联合影响.
- 优化尿素剂量和LDR比率,以最大限度地提高甲产量和毛利,同时最大限度地降低淡水需求.
主要方法:
- 一种基于模拟的方法,使用简化的无氧消化模型号. 在SuperPro Designer中使用ADM1框架.
- 响应表面方法 (RSM) 用于分析尿素剂量 (50-300 t a−1) 和LDR (0-100%) 对关键性能指标的影响.
主要成果:
- 预测的最大甲产量为5500t a−1 (0.316 Nm3 kg−1VS_Input),其中100%的LDR和251t a−1尿素.
- 在239t a-1尿素剂量下实现了124% (2.4万€ a−1) 的最佳毛利增长.
- 两种优化方案都将淡水需求降低了高达95%.
结论:
- 通过LDR进行营养物质回收和控制用尿素补充,可以大大提高农业沼气系统的效率和利能力.
- 该研究强调了整合战略的潜力,以提高生物气生产的可持续性.
- 建议进行进一步的实验验证,以证实研究结果,并在各种生物气过程中扩大应用范围.
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