Biostabilization is a cost-effective method for the beneficial utilization of sewage sludge. However, during the operation of sludge biostabilization, some microbial species could be released into the atmospheric environment from the solid-phase of sludge easily and present a high risk to human health. This study aimed to evaluate the risk of bioaerosol during sludge biostabilization. We found a total of nine bacterial phyla, one archaeal phylum, and two fungal phyla in the bioaerosol samples. Among them, Proteobacteria, Actinobacteria, Bacteroidetes, and Ascomycota were the dominant phyla. In addition, the bioaerosolization indexes (BI) of prokaryotic phyla and fungal phyla ranged 0–45 and 0–487, respectively. Massilia, Pseudarthrobacter, Pseudomonas, Tremellales spp., and Fusarium were the preferentially aerosolized microbial genera with maximum bioaerosolization indexes of 19962, 10360, 1802, 3055, and 7398. The bioaerosol concentration during the biostabilization ranged from 160 to 1440 cell/m, and we identified species such as Stenotrophomonas rhizophila and Fusarium graminerum with high bioaerosolization indexes that could be threats to human health. Euryachaeota, which belongs to archaeal phyla, had the highest biostabilization index in our study. We also found that Pseudarthrobacter was the easiest to aerosolize during the sludge biostabilization process.

生物稳定化是有益地利用污水污泥的一种经济有效的方法。但是，在污泥生物稳定化操作过程中，某些微生物很容易从污泥的固相释放到大气中，对人体健康构成高风险。这项研究旨在评估污泥生物稳定过程中生物气溶胶的风险。我们在生物气溶胶样品中总共发现了9个细菌门，一个古细菌门和两个真菌门。其中，Proteobacteria，Actinobacteria，Bacteroidetes和Ascomycota是优势种。此外，原核生物门和真菌生物门的生物雾化指数（BI）分别为0-45和0-487。Massilia，假单胞菌，假单胞菌，银耳属。和镰刀菌属是优先雾化的微生物属，其最大生物雾化指数分别为19962、10360、1802、3055和7398。生物稳定过程中的生物气溶胶浓度范围为160-1440细胞/ m，我们鉴定了嗜麦芽单胞菌和镰刀菌等物种。graminerum高bioaerosolization指标，可能是对人类健康的威胁。Euryachaeota属于古细菌门，在我们的研究中具有最高的生物稳定指数。我们还发现，在污泥生物稳定过程中，假单胞菌最容易雾化。