Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing, 100084, PR China.
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing, 100084, PR China; Beijing Key Laboratory of Radioactive Wastes Treatment, Tsinghua University, Beijing, 100084, PR China.
Chemosphere. 2022 Dec;308(Pt 1):136265. doi: 10.1016/j.chemosphere.2022.136265. Epub 2022 Aug 30.
The effective treatment of hospital sewage is crucial to human health and eco-environment, especially during the pandemic of COVID-19. In this study, a demonstration project of actual hospital sewage using electron beam technology was established as advanced treatment process during the outbreak of COVID-19 pandemic in Hubei, China in July 2020. The results indicated that electron beam radiation could effectively remove COD, pathogenic bacteria and viruses in hospital sewage. The continuous monitoring date showed that the effluent COD concentration after electron beam treatment was stably below 30 mg/L, and the concentration of fecal Escherichia coli was below 50 MPN/L, when the absorbed dose was 4 kGy. Electron beam radiation was also an effective method for inactivating viruses. Compared to the inactivation of fecal Escherichia coli, higher absorbed dose was required for the inactivation of virus. Absorbed dose had different effect on the removal of virus. When the absorbed dose ranged from 30 to 50 kGy, Hepatitis A virus (HAV) and Astrovirus (ASV) could be completely removed by electron beam treatment. For Rotavirus (RV) and Enterovirus (EV) virus, the removal efficiency firstly increased and then decreased. The maximum removal efficiency of RV and EV was 98.90% and 88.49%, respectively. For the Norovirus (NVLII) virus, the maximum removal efficiency was 81.58%. This study firstly reported the performance of electron beam in the removal of COD, fecal Escherichia coli and virus in the actual hospital sewage, which would provide useful information for the application of electron beam technology in the treatment of hospital sewage.
有效处理医院污水对人类健康和生态环境至关重要，尤其是在 COVID-19 大流行期间。本研究在 2020 年 7 月中国湖北 COVID-19 大流行期间，建立了电子束技术实际医院污水的示范工程作为高级处理工艺。结果表明，电子束辐照可以有效去除医院污水中的 COD、病原菌和病毒。连续监测数据表明，电子束处理后出水 COD 浓度稳定低于 30mg/L，粪大肠菌群浓度低于 50MPN/L，吸收剂量为 4kGy。电子束辐照也是灭活病毒的有效方法。与粪大肠菌群的灭活相比，病毒的灭活需要更高的吸收剂量。吸收剂量对病毒的去除效果不同。当吸收剂量在 30-50kGy 范围内时，电子束处理可完全去除甲型肝炎病毒（HAV）和星状病毒（ASV）。对于轮状病毒（RV）和肠道病毒（EV）病毒，去除效率先增加后降低。RV 和 EV 的最大去除效率分别为 98.90%和 88.49%。对于诺如病毒（NVLII）病毒，最大去除效率为 81.58%。本研究首次报道了电子束在去除实际医院污水中 COD、粪大肠菌群和病毒方面的性能，为电子束技术在医院污水处理中的应用提供了有用信息。
