Release Characteristics and Health Risks of Bioaerosol from Initial Degradation of Campus Food Waste
The unorganized release of bioaerosols from campus food waste posed a potential threat to the health of campus students and staff.In this study,an Anderson six-stage sampler and a medium-flow total suspended particulate sampler were used to collect air samples from the temporary storage process of food waste in the campus.The culturable and non-cultureable bioaerosols were analyzed by culture techniques and high-throughput sequencing.The results showed that food waste was an important source of bioaerosol release,and the concentration of fungi(224.78±27.69)CFU/m3 in bioaerosol was higher than that of bacteria(116.95±23.01)CFU/m3 and environmental background.That is,the bacterial environmental background value was(32.80±3.61)CFU/m3,and the fungal environmental background value was(54.57±17.24)CFU/m3.In terms of particle size distribution,bacterial aerosols were mainly distributed in stage Ⅰ(≥7.0 μm),and fungal aerosols were in stage Ⅳ(2.1～3.3 μm).The dominant phylum of bacterial aerosols mainly included Proteobacteria and Firmicutes.The former had a higher aerosolization level.The dominant phylum of fungal aerosols mainly included Ascomycota and Basidiomycetes,both of which were easily aerosolization.In terms of health risks,the non-carcinogenic health risk of both breathing and skin-contact were within the maximum acceptable level set by the US EPA.However,the annual exposure risk and disease burden of Pseudomonasand Fusariumwere higher than the corresponding limits.
万方数据
维普
