Waste paper and macroalgae co-digestion effect on methane production

Cristina Rodriguez, Abed Alaswad, Zaki El-Hassan, Abdul-Ghani Olabi

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)
156 Downloads (Pure)


The present study investigates the effect on methane production from waste paper when co-digested with macroalgal biomass. Both feedstocks were previously mechanically pretreated to reduce their particle size. The study was planned according two factors: the feedstock to inoculum (F/I) ratio and the waste paper to macroalgae (WP/MA) ratio. The F/I ratios checked were 0.2, 0.3 and 0.4 and the WP/MA ratios were 0:100, 25:75, 50:50, 75:25 and 100:0. The highest methane yield (386 L kg-1 VSadded) was achieved at an F/I ratio of 0.2 and a WP/MA ratio of 50:50. A biodegradability index of 0.87 obtained in this study indicates complete conversion of feedstock at an optimum C/N ratio of 26. Synergistic effect was found for WP/MA 25:75, 50:50 and 75:25 mixing ratios compared with the substrates mono-digestion.
Original languageEnglish
Pages (from-to)119-125
Early online date21 Apr 2018
Publication statusPublished - 1 Jul 2018


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