Sulu, M; Paul, R; Melville, L; (2017) Feasibility of seaweed and agricultural crop waste residues as co-digestion feedstock. In: Proceedings of the 15th IWA World Conference on Anaerobic Digestion. IWA World Conference on Anaerobic Digestion: Beijing, China.

Text Paul et al 2017- Feasibility of seaweed and agricultural crop waste residues as co-digestion feedstock.pdf Access restricted to UCL open access staff Download (438kB)

Abstract

This research aims to investigate the feasibility of wild and cultivated brown seaweed species Saccharina latissima as a novel feedstock for co-digestion process with agricultural crop waste residues including wheat, corn, grass, and sugarbeet-vegetable mix. Anaerobic digestion of seaweed has been an increasingly important area of research in recent years. Co-digestion of seaweed together with a further waste feedstock is a developing research area. These results indicate that seaweed offers potential as a co-digestion feedstock enhancing overall methane production. This is possibly because seaweed has lower cellulose, no lignin, and high sugar content which aids better digestion performance. Also, seaweed is cultivated in a marine environment, thus it does not compete with food production or potable water, which makes it an attractive biofuel feedstock. However, there are challenges involved for continuous AD operations including large scale cultivation and supply of seaweed, seasonal variability affecting the biochemical composition of seaweed, and the optimum carbon to nitrogen ratio for co-digestion using seaweed.

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