Sewage sludge reuse in agriculture is increasing, however it can be an important route for contaminants to enter the environment. The aim of this study was to evaluate earthworm Eisenia fetida capability to reduce heavy metal content in the sewage sludge (SS) amended soil and increase soil fertility in terms of soil nutrients content. Adult earthworms were introduced into aged SS amended soil (0–200 Mg ha^-1) and left for 65 days. Earthworms have stabilized soil pH and accelerated organic matter mineralization. The concentrations of most heavy metals during the vermiremediation sharply decreased, K and Mg decreased to a moderate extent, whereas Ca content has increased. The highest removal efficiency was detected for Ni, Co and Mn (> 80%), bioconcentration factors were as follows Zn > Co > Cu > Ni > Mn > Cr. The content of major nutrients (S, P) was substantially higher compared to the initial values. The most efficient remediation and soil quality improvement was achieved under the doses of 25–50 Mg ha^-1. Higher (≥ 100 Mg ha^-1) doses might restrict this technique application because of earthworm mortality and retarded growth. Overall, the study shows that vermiremediation might be a sustainable technique for ecological stabilization of SS amended soil and converting to usable for agricultural needs.

污水污泥在农业中的再利用正在增加，但它可能是污染物进入环境的重要途径。本研究的目的是评估蚯蚓Eisenia fetida降低污水污泥 (SS) 改良土壤中的重金属含量和增加土壤养分含量方面的土壤肥力的能力。将成年蚯蚓引入老化的SS改良土壤（0-200 Mg ha ^-1) 并离开了 65 天。蚯蚓稳定了土壤的pH值并加速了有机物的矿化。蠕虫修复过程中大部分重金属的浓度急剧下降，K和Mg的下降幅度适中，而Ca的含量有所增加。Ni、Co和Mn的去除效率最高（> 80%），生物富集因子为Zn > Co > Cu > Ni > Mn > Cr。与初始值相比，主要营养素（S，P）的含量明显更高。^{在 25-50 Mg ha -1}的剂量下实现了最有效的修复和土壤质量改善。更高（≥ 100 Mg ha ^-1) 剂量可能会限制这种技术的应用，因为蚯蚓死亡率和生长迟缓。总体而言，该研究表明，蚯蚓修复可能是一种可持续的技术，可用于稳定 SS 改良土壤并转化为可用于农业需求的生态系统。