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首页> 外文期刊>Waste Management >Anaerobic biodegradation of cellulosic material: Batch experiments and modelling based on isotopic data and focusing on aceticlastic and non-aceticlastic methanogenesis
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Anaerobic biodegradation of cellulosic material: Batch experiments and modelling based on isotopic data and focusing on aceticlastic and non-aceticlastic methanogenesis

机译：纤维素材料的厌氧生物降解：基于同位素数据的批处理实验和建模，并着重于破弹和非破弹甲烷化

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Utilizing stable carbon isotope data to account for aceticlastic and non-aceticlastic pathways of methane generation, a model was created to describe laboratory batch anaerobic decomposition of cellulosic materials (office paper and cardboard). The total organic and inorganic carbon concentrations, methane production volume, and methane and CO_2 partial pressure values were used for the model calibration and validation. According to the fluorescent in situ hybridization observations, three groups of methanogens including strictly hydrogenotrophic methanogens, strictly aceticlastic methanogens (Methanosaeta sp.) and Methanosarcina sp., consuming both acetate and H_2/H_2CO_3 as well as acetate-oxidizing syntrophs, were considered. It was shown that temporary inhibition of aceticlastic methanogens by non-ionized volatile fatty acids or acidic pH was responsible for two-step methane production from office paper at 35 ℃ where during the first and second steps methane was generated mostly from H_2/H_2CO_3 and acetate, respectively. Water saturated and unsaturated cases were tested. According to the model, at the intermediate moisture (150%), much lower methane production occurred because of full-time inhibition of aceticlastic methanogens. At the lowest moisture, methane production was very low because most likely hydrolysis was seriously inhibited. Simulations showed that during cardboard and office paper biodegradation at 55 ℃, non-aceticlastic syntrophic oxidation by acetate-oxidizing syntrophs and hydrogenotrophic methanogens were the dominant methanogenic pathways.
机译：利用稳定的碳同位素数据来解释甲烷生成的回弹和非回弹路径，创建了一个描述纤维素材料（办公用纸和纸板）的实验室分批厌氧分解模型。使用总有机和无机碳浓度，甲烷产量，甲烷和CO_2分压值进行模型校准和验证。根据荧光原位杂交观察，考虑了三类产甲烷菌，包括严格的氢营养型甲烷菌，严格的醋弹型甲烷菌（Methanosaeta sp。）和甲烷八叠球菌（Methanosarcina sp。），它们同时消耗乙酸盐和H_2 / H_2CO_3以及乙酸盐氧化的同养物。结果表明，非离子型挥发性脂肪酸或酸性pH值暂时抑制了乙腈产甲烷菌，是导致办公纸在35℃生成甲烷的两步反应，在第一步和第二步过程中，甲烷主要由H_2 / H_2CO_3和乙酸生成， 分别。测试了水饱和和不饱和的情况。根据该模型，在中间水分（150％）处，由于全时抑制了乙腈产甲烷菌，甲烷的产生量大大降低。在最低的湿度下，甲烷的产生非常低，因为很可能会严重抑制水解。模拟表明，在55℃的纸板和办公用纸生物降解过程中，主要的产甲烷途径是乙酸盐氧化菌和氢营养型产甲烷菌进行的非耐生橡胶合成菌氧化。

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  • 来源
    《Waste Management》 |2009年第6期|1828-1837|共10页
  • 作者

    X. Qu; V.A. Vavilin; L. Mazeas; M. Lemunier; C. Duquennoi; P.-J. He; T. Bouchez;

  • 作者单位

    State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China Cemagref UR-HBAN, Parc de Tourvoie, Antony cedex F-92163, France;

    Cemagref UR-HBAN, Parc de Tourvoie, Antony cedex F-92163, France Water Problems Institute, Russian Academy of Sciences, 3 Gubkina, Moscow 119333, Russian Federation;

    Cemagref UR-HBAN, Parc de Tourvoie, Antony cedex F-92163, France;

    Suez-Env, CIRADE, 38 Avenue Jean Jaures, 78440 Cargenville, France;

    Cemagref UR-HBAN, Parc de Tourvoie, Antony cedex F-92163, France;

    State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

    Cemagref UR-HBAN, Parc de Tourvoie, Antony cedex F-92163, France State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China;

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