Anaerobic digestion of Crassulacean Acid Metabolism plants: Exploring alternative feedstocks for semi-arid lands

Khemmathin Lueangwattanapong, Fariza Ammam, P Michael Mason, Caragh Whitehead, Simon J McQueen-Mason, Leonardo D Gomez, J Andrew C Smith, Ian P Thompson

Research output: Contribution to journalArticlepeer-review


In this work, five Crassulacean Acid Metabolism (CAM) species from the five different genera (Agave, Ananas, Euphorbia, Kalanchoe, and Opuntia) were selected as alternative feedstocks and their biochemical methane potentials (BMP) were investigated. Batch assays were performed using sludge and rumen fluid as inocula under uncontrolled pH and at mesophilic temperature (39 °C). Mean methane yields from the CAM plants inoculated with AD sludge ranged from 281 to 382 ml/gVS. These values were not significantly different from the methane yield obtained from maize, a feedstock for biomethane and volatile fatty acid (VFA), suggesting that CAM plants may be viable as bioenergy crops on poor-quality soils in areas with low rainfall that are unsuitable for cultivation of food crops.

Original languageEnglish
Article number122262
Early online date14 Oct 2019
Publication statusE-pub ahead of print - 14 Oct 2019

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© 2019 Published by Elsevier Ltd. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy.

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