城市污水污泥通过化-堆肥-虫堆肥过程稳定:使用作物-牲畜残留物
Luiz Carlos Floriano da Silva1, Luís Carlos Vinhas Ítavo2, Ricardo Martins Santos1
1Catholic University Dom Bosco (UCDB), Campo Grande, Brazil.
PloS one
|September 7, 2023
概括
这项研究表明,将30%的水合石灰添加到城市污水污泥中,可以有效地减少重金属和可活的虫蛋. 然后,农作物和牲畜残留物可以用作充填剂,用于安全的堆肥和潜在的混凝土堆肥.
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:
- 人口增长增加了对自然资源的压力,使得有效的废物管理至关重要.
- 城市污水污泥由于重金属和病原体等潜在污染物而对处置提出了挑战.
- 农作物和牲畜残留物在废物处理过程中具有充填剂的潜力.
研究的目的:
- 评估作物和畜牧业残留物作为填充剂与水合石灰用于城市污水污泥稳定和消毒.
- 为了确定水合石灰的最佳水平,用于废水污泥的化-堆肥.
- 评估化对重金属度和污水污泥中虫卵活性的影响.
主要方法:
- 城市污水污泥被用不同程度的水合石灰 (化) 处理.
- 农作物和畜牧业的残留物 (甘包,纳皮尔草,牛的含量) 被用作填充剂.
- 进行了堆肥试验,以评估重金属的减少,虫卵的活力和土的生存率 (Eisenia fetida).
主要成果:
- 石灰化显著降低了重金属度 (Ba,As,Pb,Cu,Cr,Mo,Ni,Zn) 的情况.
- 当与作物和牲畜残留物相结合时,30%的水合石灰 (SS-30) 减少了70%以上的活力虫卵.
- 在动态堆肥中,地的生存率是有希望的,至少80%的作物和牲畜残留物含量.
结论:
- 30%的水合石灰是稳定和消毒城市污水污泥的最佳方法,减少重金属和病原体.
- 农作物和牲畜残留物是性污水泥堆肥的有效填充剂.
- 化-堆肥过程显示出安全的污泥管理和随后的化堆肥的潜力.
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