Themulti-soil-layering(MSL)systems is an emerging solution for environmentally-friendly and cost-effective treatment of decentralized rural domestic wastewater.However,the role of the seemingly simple permeable layer ...Themulti-soil-layering(MSL)systems is an emerging solution for environmentally-friendly and cost-effective treatment of decentralized rural domestic wastewater.However,the role of the seemingly simple permeable layer has been overlooked,potentially holding the breakthroughs or directions to addressing suboptimal nitrogen removal performance in MSL systems.In this paper,the mechanism among diverse substrates(zeolite,green zeolite and biological ceramsite)coupled microorganisms in different systems(activated bacterial powder and activated sludge)for rural domestic wastewater purification was investigated.The removal efficiencies performed by zeolite coupled with microorganisms within 3 days were 93.8%for COD,97.1%for TP,and 98.8%for NH_(4)^(+)-N.Notably,activated sludge showed better nitrification and comprehensive performance than specialized nitrifying bacteria powder.Zeolite attained an impressive 89.4%NH4+-N desorption efficiency,with a substantive fraction of NH_(4)^(+)-N manifesting as exchanged ammonium.High-throughput 16S rRNA gene sequencing revealed that aerobic and parthenogenetic anaerobic bacteria dominated the reactor,with anaerobic bacteria conspicuously absent.And the heterotrophic nitrificationaerobic denitrification(HN-AD)process was significant,with the presence of denitrifying phosphorus-accumulating organisms(DPAOs)for simultaneous nitrogen and phosphorus removal.This study not only raises awareness about the importance of the permeable layer and enhances comprehension of the HN-AD mechanism in MSL systems,but also provides valuable insights for optimizing MSL system construction,operation,and rural domestic wastewater treatment.展开更多
多脏器衰竭（Males absent on the first,MOF）是果蝇剂量补偿复合体医学信息沟通管（man-spicific lethal,MSL）的一个关键催化亚基,特异催化组蛋白H4第16位赖氨酸（H4K16）乙酰化,促进雄性果蝇X染色体转录活性双倍于雌性果蝇X染色体,...多脏器衰竭（Males absent on the first,MOF）是果蝇剂量补偿复合体医学信息沟通管（man-spicific lethal,MSL）的一个关键催化亚基,特异催化组蛋白H4第16位赖氨酸（H4K16）乙酰化,促进雄性果蝇X染色体转录活性双倍于雌性果蝇X染色体,从而达到剂量补偿效应[1]。展开更多
基金supported by the National Natural Science Foundation of China(No.42077163).
文摘Themulti-soil-layering(MSL)systems is an emerging solution for environmentally-friendly and cost-effective treatment of decentralized rural domestic wastewater.However,the role of the seemingly simple permeable layer has been overlooked,potentially holding the breakthroughs or directions to addressing suboptimal nitrogen removal performance in MSL systems.In this paper,the mechanism among diverse substrates(zeolite,green zeolite and biological ceramsite)coupled microorganisms in different systems(activated bacterial powder and activated sludge)for rural domestic wastewater purification was investigated.The removal efficiencies performed by zeolite coupled with microorganisms within 3 days were 93.8%for COD,97.1%for TP,and 98.8%for NH_(4)^(+)-N.Notably,activated sludge showed better nitrification and comprehensive performance than specialized nitrifying bacteria powder.Zeolite attained an impressive 89.4%NH4+-N desorption efficiency,with a substantive fraction of NH_(4)^(+)-N manifesting as exchanged ammonium.High-throughput 16S rRNA gene sequencing revealed that aerobic and parthenogenetic anaerobic bacteria dominated the reactor,with anaerobic bacteria conspicuously absent.And the heterotrophic nitrificationaerobic denitrification(HN-AD)process was significant,with the presence of denitrifying phosphorus-accumulating organisms(DPAOs)for simultaneous nitrogen and phosphorus removal.This study not only raises awareness about the importance of the permeable layer and enhances comprehension of the HN-AD mechanism in MSL systems,but also provides valuable insights for optimizing MSL system construction,operation,and rural domestic wastewater treatment.
文摘多脏器衰竭（Males absent on the first,MOF）是果蝇剂量补偿复合体医学信息沟通管（man-spicific lethal,MSL）的一个关键催化亚基,特异催化组蛋白H4第16位赖氨酸（H4K16）乙酰化,促进雄性果蝇X染色体转录活性双倍于雌性果蝇X染色体,从而达到剂量补偿效应[1]。
