通过热冲击预处理和初始pH调节,提高植物废物的酸化效率
Fanfan Cai1, Ming Lin1, Ligong Wang1
1College of Chemical Engineering, Beijing University of Chemical Technology, 505 Zonghe Building A, 15 North 3rd Ring East Road, Beijing, 100029, China.
Environmental science and pollution research international
|November 29, 2023
概括
热冲击预处理的注射剂有效抑制甲的产生,并促进挥发性脂肪酸 (VFA) 从植物废物积累. 在pH值为8.0的情况下,可以获得最佳的VFA产量,这为废物处理提供了有利可图的替代方案.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
- 废物管理 废物管理
背景情况:
- 植物废物 (VWs) 的无氧消化 (AD) 生产生物气,但由于发酵时间长,经济回报低.
- 生产高价值的挥发性脂肪酸 (VFA) 而不是甲可以提高AD的利能力,缩短加工时间.
- 来自大众汽车的VFA生产是可持续废物处理和资源回收的有希望的途径.
研究的目的:
- 调查热冲击 (HS) 预处理对注射剂的影响,以抑制甲基生成.
- 评估HS预处理和初始pH调节对VWs的VFA生产的综合影响.
- 在植物废物的无氧消化过程中优化增强VFA积累的条件.
主要方法:
- 将热冲击 (HS) 预处理应用于注射剂,以抑制甲的形成.
- 系统地调查不同初始pH值 (6.0,8.0,9.0) 与HS预处理相结合.
- 使用分析方法量化挥发性脂肪酸 (VFA) 度和产量.
主要成果:
- HS预处理有效地抑制了甲的产生,同时促进了VFA的积累.
- 在初始pH值为8.0和9.0的情况下,VFA产量显著增加.
- 最高的总VFA度 (14,883 mg/L) 和产量 (496.1 mg/gVS) 在pH 8.0和HS预处理 (80°C1小时) 中获得,比对照增加了26.98%.
- 度调节影响了VFA代谢途径,酸盐在pH值6.0时占主导地位,酸盐比例在pH值更高时增加.
结论:
- 热冲击预处理是一种有效的策略,可以将无氧消化转向从蔬菜废物中生产VFA.
- 优化初始pH与HS预处理一起显著提高VFA产量和度.
- 这种方法提供了一种可行且可能更有利可图的替代方案,而不是传统的植物废物生物气生产.
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