State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Bioresour Technol. 2022 Sep;359:127438. doi: 10.1016/j.biortech.2022.127438. Epub 2022 Jun 11.
Prolonged starved anammox sludge (SAS) obtained during initial rejuvenation was inoculated into a reactor together with activated sludge (AS), anaerobic granular sludge (AGS) and modified carriers consisting of honeycomb carrier with high biological interception and activated carbon carrier with high adsorption performance. SAS accounted for 5% of the inoculated sludge. The anammox process was started and operated at around 25℃. After 160 days, the nitrogen loading rate and nitrogen removal rate reached 1.12 kgN·m·d and 0.97 kgN·m·d, respectively. Obvious red anammox biofilms were observed on the modified carriers. Microbial community analysis showed that the relative abundance of anammox bacteria increased from < 0.1% to 22.96%. Candidatus Jettenia and Candidatus Brocadia were the dominating anammox species. This work demonstrates the potential to reuse SAS to improve the start-up efficiency of anammox reactors, which makes good economic sense.
在初始复苏期间获得的长期饥饿厌氧氨氧化污泥（SAS）与活性污泥（AS）、厌氧颗粒污泥（AGS）和由具有高生物截留能力的蜂窝载体和具有高吸附性能的活性炭载体组成的改性载体一起接种到反应器中。SAS 占接种污泥的 5%。在 25℃左右启动和运行厌氧氨氧化工艺。160 天后，氮负荷率和氮去除率分别达到 1.12kgN·m·d 和 0.97kgN·m·d。在改性载体上观察到明显的红色厌氧氨氧化生物膜。微生物群落分析表明，厌氧氨氧化菌的相对丰度从<0.1%增加到 22.96%。Candidatus Jettenia 和 Candidatus Brocadia 是主要的厌氧氨氧化菌。这项工作证明了可以重复使用 SAS 来提高厌氧氨氧化反应器的启动效率，这具有很好的经济效益。
