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Effect of Mixing Driven by Siphon Flow: Parallel Experiments Using the Anaerobic Reactors with Different Mixing Modes

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Listed:
  • Takuro Kobayashi

    (Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan)

  • Ya-Peng Wu

    (Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan)

  • Kai-Qin Xu

    (Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
    School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Minghang District, Shanghai 200240, China)

  • Yu-You Li

    (Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan)

Abstract

The effect of mixing by siphon flow on anaerobic digestion, sludge distribution and microbial community were examined in parallel experiments using a siphon-mixed reactor (SMR), an unmixed reactor (UMR) and a continuously mixed reactor (CMR). The SMR performed well without the accumulation of fatty acids under COD loading rates varying from 3 to 18 kg/m 3 /day, while the UMR was totally acidified when the loading rate increased to 10 kg/m 3 /day. The methane yield of the SMR was at least 10% higher than that of the UMR, and comparable to that of the CMR. Furthermore, the SMR was found to markedly improve the dispersion of solids and reduce deposit formation compared to the UMR. Besides, during stable operation, the fatty acids level in the effluent of the SMR and UMR was lower than that in the CMR, and the archaeal community structure of the SMR was similar to that of the UMR.

Suggested Citation

  • Takuro Kobayashi & Ya-Peng Wu & Kai-Qin Xu & Yu-You Li, 2013. "Effect of Mixing Driven by Siphon Flow: Parallel Experiments Using the Anaerobic Reactors with Different Mixing Modes," Energies, MDPI, vol. 6(8), pages 1-16, August.
    • Handle: RePEc:gam:jeners:v:6:y:2013:i:8:p:4207-4222:d:28098
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    References listed on IDEAS

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    1. van Groenendaal, Willem & Gehua, Wang, 2010. "Microanalysis of the benefits of China's family-size bio-digesters," Energy, Elsevier, vol. 35(11), pages 4457-4466.
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    Cited by:

    1. Zhang, Jingxin & Mao, Liwei & Nithya, Karthikeyan & Loh, Kai-Chee & Dai, Yanjun & He, Yiliang & Wah Tong, Yen, 2019. "Optimizing mixing strategy to improve the performance of an anaerobic digestion waste-to-energy system for energy recovery from food waste," Applied Energy, Elsevier, vol. 249(C), pages 28-36.
    2. Pei Guo & Jiri Zhou & Rongjiang Ma & Nanyang Yu & Yanping Yuan, 2019. "Biogas Production and Heat Transfer Performance of a Multiphase Flow Digester," Energies, MDPI, vol. 12(10), pages 1-18, May.
    3. Takuro Kobayashi & Ya-Peng Wu & Zhi-Jiang Lu & Kai-Qin Xu, 2014. "Characterization of Anaerobic Degradability and Kinetics of Harvested Submerged Aquatic Weeds Used for Nutrient Phytoremediation," Energies, MDPI, vol. 8(1), pages 1-15, December.
    4. Susanne Theuerl & Johanna Klang & Annette Prochnow, 2019. "Process Disturbances in Agricultural Biogas Production—Causes, Mechanisms and Effects on the Biogas Microbiome: A Review," Energies, MDPI, vol. 12(3), pages 1-20, January.

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