Simultaneous removal of organic matter and inorganic nitrogen in Baijiu wastewater by methanotrophic denitrification

IF 9.7 1区环境科学与生态学 Q1 AGRICULTURAL ENGINEERING Bioresource Technology Pub Date : 2025-02-01 DOI:10.1016/j.biortech.2024.131956

Zhaohan Chu , Xin Tang , Yancheng Li , Jiang Li , Wei Xiong , Yaohua Yin , Xinglin Pan

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Abstract

Methanotroph could facilitate nitrogen removal during methane oxidation, and promote conversion of organic compounds by producing methane monooxygenase. Co-metabolic effect and mechanism of aerobic methane oxidation on the removal of nitrogen and organic matter from Baijiu wastewater were investigated using an improved denitrifying biological filter. It was found that the average removal efficiency of chemical oxygen demand (COD), total nitrogen (TN) and chroma increased by 17 %, 22 % and 10 % in reactor B with methane compared to reactor A with air only. Three-dimensional fluorescence spectroscopy and Fourier transform infrared spectroscopy analysis revealed that methanotroph co-metabolism was accompanied by eliminating nitrogen and organic matter as well as forming alcohol compounds. Metagenomic analyses revealed that Methylocaldum, the dominant genera in Reactor B, exerted a pivotal role in removing nitrogen and organic matter removal by supplying energy and catalysis. Functional genes pmoABC-amoABC could facilitate nitrogen and organic matter removal.

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甲醇营养反硝化法同时去除白酒废水中的有机物和无机氮。

甲烷氧化菌可以促进甲烷氧化过程中氮的去除，并通过生成甲烷单加氧酶促进有机物的转化。采用改进的反硝化生物滤池，研究了好氧甲烷氧化对白酒废水中氮和有机物的协同代谢作用及其机理。结果表明，反应器B对化学需氧量（COD）、总氮（TN）和色度的平均去除率比反应器A对空气的去除率分别提高了17 %、22 %和10 %。三维荧光光谱和傅里叶变换红外光谱分析表明，甲烷化菌共代谢伴随着氮和有机物的消除以及酒精化合物的形成。宏基因组分析表明，B反应器的优势属Methylocaldum通过提供能量和催化作用，在脱氮和有机物脱除中发挥了关键作用。功能基因pmoABC-amoABC可以促进氮和有机物的去除。

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来源期刊

Bioresource Technology 工程技术-能源与燃料

CiteScore

20.80

自引率

19.30%

发文量

2013

审稿时长

12 days

期刊介绍： Bioresource Technology publishes original articles, review articles, case studies, and short communications covering the fundamentals, applications, and management of bioresource technology. The journal seeks to advance and disseminate knowledge across various areas related to biomass, biological waste treatment, bioenergy, biotransformations, bioresource systems analysis, and associated conversion or production technologies. Topics include: • Biofuels: liquid and gaseous biofuels production, modeling and economics • Bioprocesses and bioproducts: biocatalysis and fermentations • Biomass and feedstocks utilization: bioconversion of agro-industrial residues • Environmental protection: biological waste treatment • Thermochemical conversion of biomass: combustion, pyrolysis, gasification, catalysis.