Sludge reduction induced by adenosine triphosphate yield in electron transport pathways with different terminal electron acceptors

doi:10.1360/N092018-00414

	Sludge reduction induced by adenosine triphosphate yield in electron transport pathways with different terminal electron acceptors
	Yan, Peng 1; Guo, Jinsong 1,3; Xu, Yufeng 2; Chen, Youpeng 1; Fang, Fang 1; Yang, Jixiang 3
刊名	Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica
	2019
卷号	49 期号:8 页码:947-960
ISSN号	16747259
DOI	10.1360/N092018-00414
英文摘要	Existing sludge reduction technologies go against sustainable wastewater treatment because these technologies themselves involve energy inputs and chemicals consumption. Bacterial yield depends on adenosine triphosphate (ATP) synthesis in metabolism. The sludge minimization induced by ATP yield with different terminal electron acceptors was investigated to reduce energy and chemicals consumption in activated sludge process with low dissolved oxygen (LDO). The results indicated that anoxic bacteria accounted for 29.7% of the total microorganisms under LDO conditions. Anoxic bacteria utilized NOx- as electron acceptor instead of O2 obtaining a lower ATP yield due to the energy transfer efficiency of NOx- was only 2/3 of that associated with O2 during electron transport. 8.0% of extracellular protein as electron carriers participated in the electron transport process of bacteria in the LDO system; however, only 2.9% of them presented in the conventional activated sludge system. The abundance of catalytic activity proteins involving biological oxidation-reduction in the LDO system sample was twice as much as that of the control system sample. LDO level stimulated the energy metabolism of bacteria by enhancing ATP synthesis, electron transport chain activity, and dehydrogenase activity. More energy was dissipated when NOx- replaced O2 as electron acceptor, and then fewer cells were generated. Sludge reduction of the LDO system reached 15.4%. Sludge reduction induced by the different electron acceptors was successfully achieved based on bacterial energetics without extra energy and chemicals inputs. © 2019, Science Press. All right reserved.
电子版国际标准刊号	2095946X
语种	中文
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/9826]
专题	中国科学院重庆绿色智能技术研究院
作者单位	1.Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing; 400045, China; 2.College of Energy and Environmental Engineering, Hebei University of Engineering, Handan; 056038, China 3.Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing; 400714, China;
推荐引用方式 GB/T 7714	Yan, Peng,Guo, Jinsong,Xu, Yufeng,et al. Sludge reduction induced by adenosine triphosphate yield in electron transport pathways with different terminal electron acceptors[J]. Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica,2019,49(8):947-960.
APA	Yan, Peng,Guo, Jinsong,Xu, Yufeng,Chen, Youpeng,Fang, Fang,&Yang, Jixiang.(2019).Sludge reduction induced by adenosine triphosphate yield in electron transport pathways with different terminal electron acceptors.Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica,49(8),947-960.
MLA	Yan, Peng,et al."Sludge reduction induced by adenosine triphosphate yield in electron transport pathways with different terminal electron acceptors".Zhongguo Kexue Jishu Kexue/Scientia Sinica Technologica 49.8(2019):947-960.