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Dual-frequency ultrasound combined with alkali pretreatment of corn stalk for enhanced biogas production

机译：双频超声结合碱处理玉米秸秆提高沼气产量

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摘要

To solve the problem of standing wave produced by single-frequency ultrasonic pretreatment, the dual-frequency ultrasound was applied to pretreat the corn stalk. In this paper, the mechanism of dual-frequency ultrasound was studied, and digital simulation results showed that the cavitation of dual-frequency ultrasound was more violent than that of single-frequency ultrasound, and its energy was more efficient. The anaerobic fermentation of corn stalk that was pretreated by dual-frequency ultrasound combined with alkali (Group 1) lasted for 53 days. The results showed that the cumulative biogas yield of Group 1 was 11.1%, 28.2% and 56.6% respectively higher than that of single-frequency ultrasound combined with alkali pretreatment (Group 2), alkali pretreatment (Group 3) and without pretreatment (Group 4). The TS removal rate of Group-1 was 9.9%, 25.0% and 71.4% respectively higher than that of other pretreatment samples, and the VS removal rate was 7.4%, 28.9% and 77.1% respectively higher than that of other group samples. The net energy of Group 1 was 32.2%, 114.9% and 19.7% higher than that of Group 2, Group 3 and Group 4. (C) 2018 Elsevier Ltd. All rights reserved.
机译：为了解决单频超声预处理产生的驻波问题，采用双频超声对玉米秸秆进行预处理。本文研究了双频超声的产生机理，数字仿真结果表明，双频超声的空化作用比单频超声的空化作用更剧烈，能量效率更高。采用双频超声与碱（组1）联合预处理的玉米秸秆厌氧发酵持续了53天。结果表明，第1组的累积沼气产量分别比单频超声联合碱预处理（第2组），碱预处理（第3组）和不进行预处理（第4组）分别高11.1％，28.2％和56.6％。 ）。第一组的TS去除率分别比其他预处理样品高9.9％，25.0％和71.4％，VS去除率分别比其他预处理样品高7.4％，28.9％和77.1％。第1组的净能量分别比第2组，第3组和第4组高32.2％，114.9％和19.7％。（C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Renewable energy》 |2018年第11期|444-451|共8页
  • 作者

    Dong Cuiying; Chen Juan; Guan Ruolin; Li Xiujin; Xin Yuefeng;

  • 作者单位

    Beijing Univ Chem Technol, Coll Informat Sci & Technol, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Coll Informat Sci & Technol, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China;

    Beijing Univ Chem Technol, Coll Informat Sci & Technol, Beijing 100029, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Corn stalk; Dual-frequency ultrasound pretreatment; Combined pretreatment;

    机译：玉米秸秆;双频超声预处理;联合预处理;

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