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Potassium Hydroxyde Pre-Treatment Enhances Methane Yield from Giant Reed ( Arundo donax L.)

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  • Ciro Vasmara

    (CREA—Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, Via Beccastecca 345, 41018 San Cesario Sul Panaro, Italy)

  • Stefano Cianchetta

    (CREA—Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Via di Corticella 133, 40128 Bologna, Italy)

  • Rosa Marchetti

    (CREA—Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture, Via Beccastecca 345, 41018 San Cesario Sul Panaro, Italy)

  • Enrico Ceotto

    (CREA—Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Via di Corticella 133, 40128 Bologna, Italy)

  • Stefania Galletti

    (CREA—Council for Agricultural Research and Economics, Research Centre for Agriculture and Environment, Via di Corticella 133, 40128 Bologna, Italy)

Abstract

The biogas production through the anaerobic digestion (AD) of giant reed ( Arundo donax L.) biomass has received increasing attention. However, due to the presence of lignin, a low CH 4 yield can be obtained. Aiming to improve the CH 4 yield from giant reed biomass, the effectiveness of a thermo-chemical pre-treatment based on KOH was evaluated in this paper. The usefulness of a washing step before the AD was also assessed. The pre-treatment led to a specific CH 4 yield up to 232 mL CH 4 g −1 VS which was 21% higher than that from untreated biomass; the maximum daily rate of production was improved by 42%, AD duration was reduced by 10%, and CH 4 concentration in the biogas was increased by 23%. On the contrary, the washing step did not improve the AD process. Besides, washing away the liquid fraction led to biomass losses, reducing the overall CH 4 production. The use of a KOH-based pre-treatment appears as a good option for enhancing the AD of giant reed, also presenting potential environmental and agronomical benefits, like the avoidance of salty wastewater production and the likely improvement of the digestate quality, due to its enriched K content.

Suggested Citation

  • Ciro Vasmara & Stefano Cianchetta & Rosa Marchetti & Enrico Ceotto & Stefania Galletti, 2021. "Potassium Hydroxyde Pre-Treatment Enhances Methane Yield from Giant Reed ( Arundo donax L.)," Energies, MDPI, vol. 14(3), pages 1-12, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:630-:d:487444
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    References listed on IDEAS

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    1. Giovanni Alessandro Cappelli & Fabrizio Ginaldi & Davide Fanchini & Sebastiano Andrea Corinzia & Salvatore Luciano Cosentino & Enrico Ceotto, 2021. "Model-Based Assessment of Giant Reed ( Arundo donax L.) Energy Yield in the Form of Diverse Biofuels in Marginal Areas of Italy," Land, MDPI, vol. 10(6), pages 1-24, May.
    2. Ciro Vasmara & Stefano Cianchetta & Rosa Marchetti & Enrico Ceotto & Stefania Galletti, 2022. "Hydrogen Production from Enzymatic Hydrolysates of Alkali Pre-Treated Giant Reed ( Arundo donax L.)," Energies, MDPI, vol. 15(13), pages 1-17, July.
    3. Siswo Sumardiono & Bakti Jos & Agata Advensia Eksa Dewanti & Isa Mahendra & Heri Cahyono, 2021. "Biogas Production from Coffee Pulp and Chicken Feathers Using Liquid- and Solid-State Anaerobic Digestions," Energies, MDPI, vol. 14(15), pages 1-15, August.
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    5. Yang Mo Gu & Seon Young Park & Ji Yeon Park & Byoung-In Sang & Byoung Seong Jeon & Hyunook Kim & Jin Hyung Lee, 2021. "Impact of Attrition Ball-Mill on Characteristics and Biochemical Methane Potential of Food Waste," Energies, MDPI, vol. 14(8), pages 1-10, April.
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