虫活动减少了污水污泥中的细菌病原体负载
Manuel Aira1, Alejandro Garrido-Maestu2, Marta Prado2
1Grupo de Ecoloxía Animal (GEA), Universidade de Vigo, 36310, Vigo, Spain. aira@uvigo.es.
Environmental science and pollution research international
|October 19, 2024
概括
虫堆肥有效减少污水污泥中的有害细菌,如大肠杆菌和李斯特菌单细胞菌. 这个过程将废物转化为安全的有机肥料,表明其在城市废物管理方面的潜力.
科学领域:
- 环境微生物学 环境微生物学
- 废物管理 废物管理
- 土壤科学 土壤科学
背景情况:
- 污水处理厂 (WWTP) 产生大量的污水污泥,由于人类细菌病原体 (HBPs) 造成健康风险.
- 污水污泥的土地处置是常见的,需要方法来减轻病原体负载.
- 虫堆肥是一种潜在的生物处理方法,用于减少有机废物中的HBPs.
研究的目的:
- 为了确定土是否减少或消除污水污泥中的HBPs.
- 为了确定HBP降低是否发生在活跃 (造) 或成熟 (vermicompost) 阶段.
- 评估从污水污泥中提取的虫堆肥是否适合作为有机肥料.
主要方法:
- 量化PCR (qPCR) 用于分析HBPs (大肠杆菌O157,L.单细胞原体,沙门氏菌种类,总大肠杆菌).
- 样本包括来自三个水处理厂的污水污泥,新鲜的虫造物和虫堆肥.
- 在污水污泥,料和料之间比较HBP水平.
主要成果:
- 沙门氏菌 spp. 沙门氏菌 和大肠杆菌O157在任何样本中都没有检测到.
- 虫显著减少了污水污泥中的大肠杆菌和L. monocytogenes.
- 与原始污泥相比,土虫料和料中HBP的丰度较低,大肠杆菌的显著减少 (95%在料中,43%在料中).
结论:
- 虫堆肥有效减少污水污泥中的致病细菌.
- 该过程产生了符合微生物病原体含量有机肥标准的化肥.
- 昆虫堆肥为可持续的城市废物管理提供了一个有希望的战略.
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