为新出现的污染物生物降解进行空气消化后堆肥:操作条件的影响
Victoria J Larson1, Jorge L Rico1, Lisa M Wolfe2
1Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, Colorado, USA.
Journal of environmental quality
|September 20, 2023
概括
在无氧消化 (AD) 后优化有氧堆肥 (AC) 有效地从中去除新出现的污染物,如药品. 特定的温度,pH值和碳来源最大限度地降解了关键污染物的生物降解.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 可持续的便管理需要先进的技术.
- 将无氧消化 (AD) 和有氧堆肥 (AC) 结合起来,为能源生产和污染物清除提供了一个有前途的方法.
研究的目的:
- 确定最佳的有氧堆肥 (AC) 条件,以降解牛消化剂中的新出现的污染物 (EC).
- 为了研究在AC过程中特定的兽医药品和激素的生物降解.
主要方法:
- 在基板级反应堆中模拟堆肥条件,使用来自AD系统的消化物.
- 不同的温度,pH值和碳源组成,以模仿共消化场景.
- 确定了可能参与污染物生物降解的微生物.
主要成果:
- 在35°C,pH值7的温度下实现硫甲醇 (SMX) 的最大生物降解,其中含有大量易于降解的碳.
- 雌激素 (E1) 的最大生物降解发生在35°C的温度下,低水平的易于降解的碳.
- 环素几乎完全被非生物去除;纳普洛森显示部分非生物降解.
结论:
- 特定的AC条件可以显著提高从消化的中去除ECs.
- 来自AD过程的微生物在AC过程中在SMX和E1的生物降解中发挥作用.
- 这种联合的AD-AC方法对于可持续的便处理和污染物减轻是有效的.
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