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Adjusting the rheological properties of corn-straw slurry to reduce the agitation power consumption in anaerobic digestion
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China.
State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China.
State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing, China.
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2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 272, p. 360-369Article in journal (Refereed) Published
Abstract [en]

Agitation power consumption (P) in the anaerobic digestion of biogas plants is a major consumer of electric energy. To reduce P by adjusting the rheological properties, in this work, the rheological properties of the corn-straw slurry were studied systematically considering the effects of TS, temperature and particle-size, and P was calculated based on the rheological behavior of the corn-straw slurry. The investigation shows that the corn-straw slurry is a non-Newtonian fluid and exhibit shear-thinning behavior, and the rheological properties can be well described with the power law model. The size-reduction is more effective compared to the option of temperature-increase to improve the agitation power efficiency, and the value of P can be reduced by up to 48.11 %. Since the size-reduction can also increase the methane yield, the reduction of the particle-size is a promising option to save P, especially at relatively high TSs and for the thermophilic AD process.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 272, p. 360-369
Keywords [en]
Rheological properties, Corn-straw slurry, Agitation power consumption, Anaerobic digestion
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-71317DOI: 10.1016/j.biortech.2018.10.050ISI: 000451625700046PubMedID: 30384211Scopus ID: 2-s2.0-85055572951OAI: oai:DiVA.org:ltu-71317DiVA, id: diva2:1259471
Note

Validerad;2018;Nivå 2;2018-10-30 (svasva)

Available from: 2018-10-30 Created: 2018-10-30 Last updated: 2019-04-02Bibliographically approved

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Chen, JingjingJi, Xiaoyan

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