气候变化领域集成服务门户(CCPortal): Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance

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DOI	10.1016/j.envres.2021.110744
	Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance
	Luo X.; Peng C.; Shao P.; Tang A.; Huang A.; Wu Q.; Sun L.; Yang L.; Shi H.; Luo X.
发表日期	2021
ISSN	139351
卷号	194
英文摘要	Due to cause the deterioration of water quality and can produce toxic nitrite, the nitrate constituted of great threatens to human health and eco-systematic safety. Among most well-known biotechnology to remove nitrate, the integrated heterotrophic and autotrophic denitrification (IHAD) process is promising, especially for the organic-limited polluted water. In this work, the IHAD coupled manganese oxidation (IHAD-MnO) process was developed by using Pseudomonas sp. SZF15 (Gram negative strain, and rod-shaped morphology with 2.3 μm in length) in the glass serum bottles. It was found that limited organic content could accelerate nitrate removal rate, and manganese oxidation efficiency can reach up to 60.08%. To further explain carbon conversion characteristics of the process, pure heterotrophic condition assays were conducted, the results confirmed that inorganic carbon will be generated by organic carbon metabolism in heterotrophic condition, the maximum accumulation content of inorganic carbon was 142.21 mg/L (when the initial organic carbon level was 293 mg-C/L). Subsequently, since the consumption of organic carbon, biogenic inorganic carbon can be further utilized by microorganisms to support autotrophic denitrification (AuDN). Besides, X-ray photoelectron spectroscopy (XPS) was employed to analyze precipitation products produced from the process. The magnified Mn 2p spectra results showed that a typical characteristic peak of manganese dioxide was observed with the intense peak at 641.8 eV and a satellite peak at 653.7 eV, respectively. This showed that Mn(II) was oxidized to manganese dioxide by the process, which may be a functional material with adsorption properties. The process posed a highly efficient and cost effective solution with less carbon consumption and less greenhouse gas emission for sustainable water treatment technologies. © 2021 Elsevier Inc.
英文关键词	Autotrophic; Heterotrophic; Manganese oxidized; Mixotrophic denitrification; Nitrate removal
scopus关键词	adsorption; denitrification; detection method; integrated approach; manganese oxide; metabolism; nitrate; organic carbon; oxidation; pollutant removal; precipitation (chemistry); wastewater; wastewater treatment; water treatment; Negibacteria; Pseudomonas sp.
来源期刊	Environmental Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177225
作者单位	Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, China
推荐引用方式 GB/T 7714	Luo X.,Peng C.,Shao P.,et al. Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance[J],2021,194.
APA	Luo X..,Peng C..,Shao P..,Tang A..,Huang A..,...&Luo X..(2021).Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance.Environmental Research,194.
MLA	Luo X.,et al."Enhancing nitrate removal from wastewater by integrating heterotrophic and autotrophic denitrification coupled manganese oxidation process (IHAD-MnO): Internal carbon utilization performance".Environmental Research 194(2021).