生物气泥与花园废物的共同堆肥下,的转化及其微生物机制
Xiao-Feng Liang1,2, Hong Wang2, Yu-Zhong Li3
1College of Mechanical Engineering, Chengdu University, Chengdu 610106, China.
Ying yong sheng tai xue bao = The journal of applied ecology
|September 11, 2023
概括
直接将花园垃圾与生物气泥共同堆肥有效地减少了气损失和环境影响. 这种方法提高了堆肥成熟度和发芽指数,提供了可持续的废物回收解决方案,不需要尿素或微生物添加剂.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 废物管理 废物管理
背景情况:
- 中国每年大量生产的花园垃圾需要有效的处置方法.
- 传统的用尿素和微生物注射剂进行堆肥导致大量的气损失和环境问题.
- 生物气泥含有丰富的和微生物,是减少堆肥过程中损失的潜在替代品.
研究的目的:
- 研究与生物气泥共堆肥花园废物的分解,转化和损失.
- 评估使用生物气泥作为尿素和微生物注射剂的替代品的有效性.
- 为了比较不同协同堆肥处理的环境影响和产品质量.
主要方法:
- 建立了三种共同堆肥处理方法:生物气泥 + 园林废物 (GB),GB + 尿素 (GBU) 和GB + 尿素 + 微生物注射剂 (GBUM).
- 对分解动态,温度,pH值和电导率 (EC) 的监测.
- 使用发芽指数 (GI) 分析转化,氨 (NH3) 和氧化 (N2O) 排放以及产品质量.
- 双同位素分析 (δ18O vs. δ15NSP) 用于确定转化途径.
主要成果:
- 在GB处理过程中,表现出更长,更稳定的高温堆肥期.
- GB处理导致了最高的发芽指数 (221.8%) 和最佳的pH和EC值.
- 与GBU和GBUM相比,在GB处理中NH3和N2O排放率显著降低 (分别降低了99.0%和50.0%).
- 双同位素分析表明,脱在GB和GBU中占主导地位,GB的贡献更高,而GBUM则有利于化.
- GB处理实现了更高的N2O减少 (83.7%),并显示了最低的气损失.
结论:
- 生物气泥和花园废物的直接共同堆肥是可行的,没有C/N比率调整或微生物添加.
- 这种共同堆肥方法显著减少了气损失和环境污染,特别是N2O排放.
- 该研究证明了废物回收和资源回收的可持续和资源高效方法.
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