新型SBR工艺是在传统SBR反应器中加一隔板,将反应器从空间上分成上下两个区域,上面是好氧区,下面为缺氧厌氧区。实验通过水力停留时间和上下区域体积比对脱氮除磷效果影响的研究,确定该工艺的最佳运行工况和反应器内挡板位置;同时与传统...新型SBR工艺是在传统SBR反应器中加一隔板,将反应器从空间上分成上下两个区域,上面是好氧区,下面为缺氧厌氧区。实验通过水力停留时间和上下区域体积比对脱氮除磷效果影响的研究,确定该工艺的最佳运行工况和反应器内挡板位置;同时与传统SBR工艺进行对比实验研究。结果表明,进水60 m in,曝气240 m in,沉淀30 m in,排水15 m in,闲置15 m in;上下区域体积比为1∶1时脱氮除磷效果最佳,TN和TP去除率达到88.7%和78.4%,其效果均好于传统SBR工艺。展开更多
针对受控生态生保系统(CELSS)中生活废水(含卫生废水和尿液废水)的水质特点,采用厌氧、好氧两级MBfR工艺,完成CELSS特征性生活废水的微生物转化处理,以达到循环回用作植物营养液的水质要求。本文研究了水力停留时间(HRT)、尿液强度对该...针对受控生态生保系统(CELSS)中生活废水(含卫生废水和尿液废水)的水质特点,采用厌氧、好氧两级MBfR工艺,完成CELSS特征性生活废水的微生物转化处理,以达到循环回用作植物营养液的水质要求。本文研究了水力停留时间(HRT)、尿液强度对该工艺有机物去除及氮素转换效率的影响。试验结果表明,当HRT≥1 d时,HRT对该系统TOC的去除效率无明显影响,其去除效率大于90%,出水TOC的浓度低于15 mg/L;HRT=1 d时,好氧反应器全程硝化能力达到最高,其容积负荷为0.418 kg N/(m^3·d);而HRT≥2 d时,能获得相对更为稳定的氮素转换效率。工艺系统最高能处理1/5尿液强度的生活废水,该条件下,系统TOC的去除率达94.3%,出水TOC浓度低于20 mg/L;系统氮素的全程硝化效率为90.6%,且反应器容积负荷较高为0.409 kg N/(m^3·d)。本文构建的两级MBfR工艺能较好地实现CELSS中特征性生活废水的有机物去除和氮素的有效转换,研究结果可为CELSS中生活废水微生物处理系统的设计和运行提供参考。展开更多
The paper provides an investigation and understanding of the significance of various wastewater flows on microplastics retainment and emission to the environment. WWTPs and sewer overflows as an important pathway of m...The paper provides an investigation and understanding of the significance of various wastewater flows on microplastics retainment and emission to the environment. WWTPs and sewer overflows as an important pathway of microplastics to the environment are assessed by considering the removal of microplastics in WWTPs with different treatment processes and several sewer overflow types and their contribution to microplastic loads to recipients. On the example of the Baltic Sea basin, presented results indicate a considerable discharge of microplastic from WWTPs despite the relatively good overall removal efficiency. Results show that the discharge of microplastics from sewer overflows can be in the same magnitude as from treated wastewater although the total flow is much lower than that of treated wastewater. Sewer overflow events frequently occur and are expected to increase due to climate change and urbanization, unless infrastructure is adapted. At the same time, sewer overflows are often neglected in conventional wastewater handling.展开更多
文摘新型SBR工艺是在传统SBR反应器中加一隔板,将反应器从空间上分成上下两个区域,上面是好氧区,下面为缺氧厌氧区。实验通过水力停留时间和上下区域体积比对脱氮除磷效果影响的研究,确定该工艺的最佳运行工况和反应器内挡板位置;同时与传统SBR工艺进行对比实验研究。结果表明,进水60 m in,曝气240 m in,沉淀30 m in,排水15 m in,闲置15 m in;上下区域体积比为1∶1时脱氮除磷效果最佳,TN和TP去除率达到88.7%和78.4%,其效果均好于传统SBR工艺。
文摘针对受控生态生保系统(CELSS)中生活废水(含卫生废水和尿液废水)的水质特点,采用厌氧、好氧两级MBfR工艺,完成CELSS特征性生活废水的微生物转化处理,以达到循环回用作植物营养液的水质要求。本文研究了水力停留时间(HRT)、尿液强度对该工艺有机物去除及氮素转换效率的影响。试验结果表明,当HRT≥1 d时,HRT对该系统TOC的去除效率无明显影响,其去除效率大于90%,出水TOC的浓度低于15 mg/L;HRT=1 d时,好氧反应器全程硝化能力达到最高,其容积负荷为0.418 kg N/(m^3·d);而HRT≥2 d时,能获得相对更为稳定的氮素转换效率。工艺系统最高能处理1/5尿液强度的生活废水,该条件下,系统TOC的去除率达94.3%,出水TOC浓度低于20 mg/L;系统氮素的全程硝化效率为90.6%,且反应器容积负荷较高为0.409 kg N/(m^3·d)。本文构建的两级MBfR工艺能较好地实现CELSS中特征性生活废水的有机物去除和氮素的有效转换,研究结果可为CELSS中生活废水微生物处理系统的设计和运行提供参考。
文摘The paper provides an investigation and understanding of the significance of various wastewater flows on microplastics retainment and emission to the environment. WWTPs and sewer overflows as an important pathway of microplastics to the environment are assessed by considering the removal of microplastics in WWTPs with different treatment processes and several sewer overflow types and their contribution to microplastic loads to recipients. On the example of the Baltic Sea basin, presented results indicate a considerable discharge of microplastic from WWTPs despite the relatively good overall removal efficiency. Results show that the discharge of microplastics from sewer overflows can be in the same magnitude as from treated wastewater although the total flow is much lower than that of treated wastewater. Sewer overflow events frequently occur and are expected to increase due to climate change and urbanization, unless infrastructure is adapted. At the same time, sewer overflows are often neglected in conventional wastewater handling.
