Abstract The source separation and decentralised treatment technology for domestic wastewater is an important method to improve sewage treatment rates and water reuse. The Living Machine (LM) system is a widely applied decentralised domestic wastewater treatment technology. In order to enhance the black water (toilet water) treatment performance, an underwater lamp was placed in the open aerobic reactor of the LM system, and treatment efficiency and micro-ecosystem changes with different light intensities were studied in this research. Compared to the control reactor (C), removal efficiencies of ammonia, total nitrogen (TN), and total phosphorus (TP) were increased from 22.07%, 16.03%, and 13.81% to 42.20%, 22.82%, and 17.20%, respectively, in the underwater light reactor (L) with an average intensity of 2083.00 LX, and COD removal was not obviously effected. The species and numbers of algae and the species of zooplankton and other aquatic animals were increased sharply in L, but their number did not fit a linear relation with light intensity. The bacteria group was prominently changed in L, whereas Malikia_spinosa, Emticicia_sediminis, and Rhodocyclaceae_bacterium_MORI13 were increased, and Rhodocyclaceae_bacterium_ICHIDE18 was obviously decreased. Although underwater illumination enhanced the wastewater reactor performance of the LM open aerobic reactor, further research is needed to learn more about the process optimization and relative mechanism.

中文翻译：

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水下光增强废水处理：活机开放式好氧反应器的效率和微生态系统改变

摘要 生活污水源头分离分散处理技术是提高污水处理率和中水回用的重要手段。Living Machine（LM）系统是一种广泛应用的分散式生活污水处理技术。为了增强黑水（厕所水）处理性能，本研究在LM系统的开放式好氧反应器中放置了水下灯，研究了不同光强下的处理效率和微生态系统变化。与对照反应器（C）相比，氨、总氮（TN）和总磷（TP）的去除效率分别从22.07%、16.03%和13.81%提高到42.20%、22.82%和17.20% , 在平均强度为 2083.00 LX 的水下光反应堆 (L) 中，COD去除效果不明显。藻类和浮游动物及其他水生动物的种类和数量在L中急剧增加，但它们的数量与光照强度不符合线性关系。L中菌群变化显着，而Malikia_spinosa、Emticicia_sediminis和Rhodocyclaceae_bacterium_MORI13增加，Rhodocyclaceae_bacterium_ICHIDE18明显减少。虽然水下照明增强了 LM 开放式好氧反应器的废水反应器性能，但需要进一步研究以了解更多关于工艺优化和相关机制的信息。L中菌群变化显着，而Malikia_spinosa、Emticicia_sediminis和Rhodocyclaceae_bacterium_MORI13增加，Rhodocyclaceae_bacterium_ICHIDE18明显减少。虽然水下照明增强了 LM 开放式好氧反应器的废水反应器性能，但需要进一步研究以了解更多关于工艺优化和相关机制的信息。L中菌群变化显着，而Malikia_spinosa、Emticicia_sediminis和Rhodocyclaceae_bacterium_MORI13增加，Rhodocyclaceae_bacterium_ICHIDE18明显减少。虽然水下照明增强了 LM 开放式好氧反应器的废水反应器性能，但需要进一步研究以了解更多关于工艺优化和相关机制的信息。